A Californian drying out in South Africa

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Re: A Californian drying out in South Africa

Post by The Nun » Wed Oct 09, 2019 8:02 am

If you dont use distilled water to fill up your cooling system but just ordinary tap water might that have trace elements of metal in it that could build up and form the rusting over time also?
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Re: A Californian drying out in South Africa

Post by 617sqn » Wed Oct 09, 2019 8:12 am

True. I always use de-ionised water and Blucol, even for occasional topping up.

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Re: A Californian drying out in South Africa

Post by African Imp » Thu Oct 10, 2019 6:05 am

The spare impeller with the stainless steel shaft tempted me to do a trial assembly, I still need new bearings, the used carbon seals that I have need bedding in though.

I did a trial run and can report that the idea works but the carbon is far harder than I would have imagined ?

The method used was to hold the carbon seal with my left hand while pressing it tightly against the cast iorn face of the impeller, it will require re doing before I can use the pump.
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Re: A Californian drying out in South Africa

Post by The Nun » Thu Oct 10, 2019 6:43 am

Are you doing stainless shafts for them now ?
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Re: A Californian drying out in South Africa

Post by African Imp » Thu Oct 10, 2019 6:55 am

The Nun wrote:
Thu Oct 10, 2019 6:43 am
Are you doing stainless shafts for them now ?
Not myself, it was supplied by someone on your side, I will email you the name just now.

The shaft shows no signs of being made on a lathe, it was cast in stainless and including the key slots, the quality is amazing :)

To The Nun, email sent.
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Re: A Californian drying out in South Africa

Post by African Imp » Fri Oct 11, 2019 1:36 pm

My oil free ( external ) transaxle casing makes me happy :D
I followed the lead from from forum member Noddy and fitted a second earth strap in a more visible position and next to the rear engine mount.
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Re: A Californian drying out in South Africa

Post by African Imp » Sat Oct 12, 2019 8:27 am

Imp owner Eric Wells has just been to see me, he brought his Imp and with the water pump assembly that I gave him fitted.

The fix on that one was new seals, new bearings and as the faces on the impeller where the carbon seal sits were worn or undercut and could not be turned on a lathe to clean them up anymore, I fitted a pair of stainless 316 grade washers to the impeller to carbon faces.

They work and there is no sign of a coolant leak :D

Please note, some washers are stamped out and are a long way from being flat, you need washers that are totally flat.

Images first posted January 2nd 2017
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Re: A Californian drying out in South Africa

Post by African Imp » Sat Oct 12, 2019 10:16 am

In defence of the original water pump design and my feelings that once rebuilt with new parts and as mentioned some machine work, there are some home mechanics out there that do themselves no good at all, the seal in my picture is new, it strangely leaked as soon as water was put into the radiator.

A friend imported a new impeller, seals and bearings and re assembled the pump, he has just asked me to have a look at it to see why it leaked?

They are hacksaw cuts, four of them, was this to lubricate the shaft bearing with water?

A case for some JB Weld epoxy as a repair?

The other side of the shaft and pump was ok.
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Re: A Californian drying out in South Africa

Post by 617sqn » Sat Oct 12, 2019 10:41 am

They look like they're shatter damage to me, not cuts. Perhaps it was dropped. Graphite is brittle. JB weld is good, but is it appropriate in this case ? I don't know ...

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Re: A Californian drying out in South Africa

Post by African Imp » Sat Oct 12, 2019 10:44 am

617sqn wrote:
Sat Oct 12, 2019 10:41 am
They look like they're shatter damage to me, not cuts. Perhaps it was dropped. Graphite is brittle. JB weld is good, but is it appropriate in this case ? I don't know ...

Andy G.
We are thinking along the same lines, I have just inspected the carbon side with a magnifying glass, indeed the cuts are uneven and they are not from a hacksaw.

The pump when assembled was tight, did the carbon bond to the impeller?
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Re: A Californian drying out in South Africa

Post by The Nun » Sat Oct 12, 2019 11:32 am

If the pumps been assembled by hammering/drifting rather than careful pressing it together you coukd damaged the seals? Some folk only have a hammer and screwdriver in their tool kit.
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Re: A Californian drying out in South Africa

Post by 617sqn » Sat Oct 12, 2019 11:39 am

This is true : I once saw a bloke hammering in a wheel bearing in a field at National one year. And I don't mean gently either. And he once worked on aircraft too, apparently. :o

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Re: A Californian drying out in South Africa

Post by African Imp » Sat Oct 12, 2019 11:55 am

The Nun wrote:
Sat Oct 12, 2019 11:32 am
If the pumps been assembled by hammering/drifting rather than careful pressing it together you coukd damaged the seals? Some folk only have a hammer and screwdriver in their tool kit.
Both water pumps that I opened had signs of a heavy hand on the bearing cases, my screwdriver points to the damage on one of them.

This one was assembled in the UK the work was done with a new impeller, new carbon seals and used bearings, it was sold via Ebay.
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Re: A Californian drying out in South Africa

Post by African Imp » Sat Oct 12, 2019 11:59 am

617sqn wrote:
Sat Oct 12, 2019 11:39 am
This is true : I once saw a bloke hammering in a wheel bearing in a field at National one year. And I don't mean gently either. And he once worked on aircraft too, apparently. :o

Andy G. Image Stan
How about leaving loose washers and a large circlip inside the impeller assembly?

This was today and one of the two pumps that I stripped.

The washers to the right where on the shaft and doing nothing.
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Re: A Californian drying out in South Africa

Post by African Imp » Sat Oct 12, 2019 12:57 pm

The pump that had the shattered carbon seal also saw some heavy action when the new bearing was fitted. :(

It seems that the bearing may have seized and damaged the carbon seal?
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Re: A Californian drying out in South Africa

Post by The Nun » Sat Oct 12, 2019 1:49 pm

Must be the bloke who wrote the song if I had a hammer :lol:
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Re: A Californian drying out in South Africa

Post by The Nun » Sat Oct 12, 2019 1:55 pm

617sqn wrote:
Sat Oct 12, 2019 11:39 am
And he once worked on aircraft too, apparently. :o

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Once being the operative word, then he got the sack. :lol:
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Re: A Californian drying out in South Africa

Post by African Imp » Sun Oct 13, 2019 7:02 am

A new mouse trap?

I need others to advise me here please, as I am living in a partial Hillman Imp vacuum I do not have a lot of information on the Imps and especially after October 1968 when I left England and moved to the country of South Africa.

Meaning new parts and changes to existing assemblies such as a water pump were not seen, unless I opened up a water pump and found a change?

This happened yesterday, a rebuilt but faulty water pump turns out to have a new type of impeller, I think it has blades cast from an alloy such as LM6 which has a center boss in possibly 304 grade stainless steel?

Who makes this item?

If it is LM6 grade alloy , it is suitable for casting and also anodising, it has a high silicone content and is grade BS 1490 1988 LM6.
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Re: A Californian drying out in South Africa

Post by 617sqn » Sun Oct 13, 2019 8:22 am

Yes, Roy. I'm told that there are 2 or 3 different styles. Even the casings cannot be inter mixed. This makes it awkward for people repairing more than one pump en-mass as its better to keep each shell with its partner and shaft/impeller.

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Re: A Californian drying out in South Africa

Post by The Nun » Sun Oct 13, 2019 9:19 am

Sounds to me if youve got a lot of dismantled pump parts/mixed up, its going to be hard to know which goes with what?
I wonder if thats what happens when folk buy refurbed pumps only the find they start leaking after a relatively short time, the parts its assembled with arent really compatible as a working unit as they arent supposed to go together??

I think in future I will only buy the full "new" remanufactured pump then theres a chance its all as it supposed to be and last for once.
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Re: A Californian drying out in South Africa

Post by African Imp » Sun Oct 13, 2019 9:26 am

The Nun wrote:
Sun Oct 13, 2019 9:19 am
Sounds to me if youve got a lot of dismantled pump parts/mixed up, its going to be hard to know which goes with what?
I wonder if thats what happens when folk buy refurbed pumps only the find they start leaking after a relatively short time, the parts its assembled with arent really compatible as a working unit as they arent supposed to go together??

I think in future I will only buy the full "new" remanufactured pump then theres a chance its all as it supposed to be and last for once.
Yes, Eric has just been to see me and his two water pumps which are now in parts, I have them is separate boxes for the seasons you mention, already we have noted that the two shafts are machined differently, I will keep and eye on what fits what when Eric supplies the new bearings and seals he will buy in next week.

Note, his water pump with the stainless washers in is still working fine, I will re assemble his two pumps so that he can use one and then have a spare, my pump now fitted to his car then comes back to me and as a tested unit :)

Note, James Spencer has access to the water pumps original drawings via the ARCC.
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Re: A Californian drying out in South Africa

Post by Bobbycham » Sun Oct 13, 2019 9:46 am

African Imp wrote:
Sat Oct 12, 2019 8:27 am


The fix on that one was new seals, new bearings and as the faces on the impeller where the carbon seal sits were worn or undercut and could not be turned on a lathe to clean them up anymore, I fitted a pair of stainless 316 grade washers to the impeller to carbon faces.

How did you actually fit the stainless washers ? were they a press fit on freshly turned diameter or did you bond them with something?

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Re: A Californian drying out in South Africa

Post by African Imp » Sun Oct 13, 2019 9:57 am

Bobbycham wrote:
Sun Oct 13, 2019 9:46 am
African Imp wrote:
Sat Oct 12, 2019 8:27 am


The fix on that one was new seals, new bearings and as the faces on the impeller where the carbon seal sits were worn or undercut and could not be turned on a lathe to clean them up anymore, I fitted a pair of stainless 316 grade washers to the impeller to carbon faces.

How did you actually fit the stainless washers ? were they a press fit on freshly turned diameter or did you bond them with something?

Bob Imp005
Finding washers the correct size both in diameter and hole size was probably not possible, however I do have a fair stock of stainless fasteners and washers so I may have been lucky?

Opening the hole up with a power rotary file would not have been difficult.

I will have bonded the washers to the impeller with an epoxy like JB Weld or used Loctite 648 as I have both in stock.

I suspect to ensure that the washer faces were true to the carbon seal faces that I assembled the pump to bring all parts together?
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Re: A Californian drying out in South Africa

Post by African Imp » Sun Oct 13, 2019 10:00 am

Bill who owns an imp at Durbanville near Cape Town got the water pump drawings from the ARCC and as he has a lathe and is also an engineer he made a new shaft and fitted ceramic washers to rebuild his water pump with.
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Re: A Californian drying out in South Africa

Post by African Imp » Sun Oct 13, 2019 1:00 pm

A few days back and Jean views the bay and beach where she used to live named Glen Beach with Camps Bay further on.
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Re: A Californian drying out in South Africa

Post by The Nun » Sun Oct 13, 2019 1:24 pm

Did Jean drive the car that time? Or dont you trust her? :?
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Re: A Californian drying out in South Africa

Post by African Imp » Sun Oct 13, 2019 1:36 pm

The Nun wrote:
Sun Oct 13, 2019 1:24 pm
Did Jean drive the car that time? Or dont you trust her? :?
Oh I can trust Jean to drive the car ok, as she drove our Singer Chamois as her daily driver for some thirteen years, so meaning she has driven an Imp more than myself in the past twenty years.

She has not driven the Californian since it came back home.

It was Jeans suggestion that we take the Imp to Glen Beach to see her old home which has a new owner and is being totally remodled and rebuilt.
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Re: A Californian drying out in South Africa

Post by 617sqn » Sun Oct 13, 2019 6:06 pm

That post sticking up out of the sunroof isn't too aerodynamic is it ? :o

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Re: A Californian drying out in South Africa

Post by oli » Sun Oct 13, 2019 9:10 pm

If you PM me Roy, I can explain exactly what you have ref the waterpump impeller, and I can probably help you with some other info ref waterpumps.
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Re: A Californian drying out in South Africa

Post by African Imp » Mon Oct 14, 2019 12:47 pm

A change of direction, I am now preparing the new ( 2012 ) Singer Chamois Sport engine to go into the Californian.

With its new Hepolite Powermax 0.060" pistons fitted it should be around 916cc and then I may at last loose that oil leak from the cranks scroll area?
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Re: A Californian drying out in South Africa

Post by African Imp » Tue Oct 15, 2019 5:58 am

A spin on oil filter has been a long time on my things to do list :)
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Re: A Californian drying out in South Africa

Post by African Imp » Wed Oct 16, 2019 3:14 pm

I will test the spin on oil filter for leaks with the motor on the bench, cranked with the starter motor I hope to have enough oil flow through the oil galleries to do this.

The hose is to replace the oil cooler.
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Re: A Californian drying out in South Africa

Post by African Imp » Wed Oct 16, 2019 3:16 pm

The new engine has a lightened and balanced flywheel and clutch pressure plate.
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Re: A Californian drying out in South Africa

Post by African Imp » Wed Oct 16, 2019 3:19 pm

When I can I am using Dowty seals on this engine.
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Re: A Californian drying out in South Africa

Post by African Imp » Thu Oct 17, 2019 7:28 am

I had written on the cam cover of the 1966 Singer Chamois Sport engine, R17 fitted March 2012, yesterday I removed it and fitted a Sport camshaft.
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Re: A Californian drying out in South Africa

Post by African Imp » Thu Oct 17, 2019 7:29 am

The R 17 camshaft now removed, this was due to an Imp Club member advising me that I require competition valve springs to run a 360" lift camshaft, as the standard sport Imps inner spring with its eight coils, can become coil bound and I do not need that kind of problem in my life.
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Re: A Californian drying out in South Africa

Post by African Imp » Fri Oct 18, 2019 5:58 am

With a new oil pump being on my desk the best thing to do with it was install it into the rebuilt Singer Sport engine .

The pump I removed had been in service but the rotor was still within measurements, as we can see, the wear on the drive gear was noticeable, I assume that when the new pumps are assembled they are dry run as the new pumps drive gear shows wear on the teeth.

Many thanks to Eric Wells for the pump, he told me that he is going to re join The Imp Club.
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Re: A Californian drying out in South Africa

Post by African Imp » Fri Oct 18, 2019 6:02 am

I removed the oil sump pick up filter from the pump in the engine and fitted it into the new pump, loctite 648 was used to secure the threads.
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Re: A Californian drying out in South Africa

Post by moose » Fri Oct 18, 2019 9:56 am

Impellers are available in three common designs, these are closed, semi-open and open.

Open, Semi-Open and Closed Type Impellers
Closed – closed type impellers have two shrouds. The vanes of the impeller are completely sandwiched between the two shrouds. This type of impeller is very efficient for pumping low viscosity fluids with few suspended bodies (water, sea water, etc.). The closed type impeller has the greatest mechanical strength of all impeller designs due to the support given to the vanes from the shrouds.

Closed Type Impeller
Semi-Open/Semi-Closed – this type of impeller is also known as a ‘partially open’ or ‘partially closed’ type impeller. Semi-open impellers have only one shroud. This type of impeller is used for pumping fluids with a moderate amount of suspended bodies. Semi-open impellers are not as efficient as fully enclosed impellers because the pumped fluid is not guided directly along the vanes.

Semi-Open Type Impeller
Open – open type impellers have no shrouds. This type of impeller is ideally suited for pumping high viscosity fluids (providing they do not foam when agitated) and fluids with many suspended bodies. Typical applications for this type of impeller would include sewage and paper pulp. Sometimes the centre of the impeller will also be fitted with a serrated knife to chop suspended bodies as they are drawn into the eye of the impeller.
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Re: A Californian drying out in South Africa

Post by 617sqn » Fri Oct 18, 2019 11:49 am

What's your point, Mike ? 🤔

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