A Californian drying out in South Africa

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Re: A Californian drying out in South Africa

Post by Bobbycham » Tue Aug 06, 2019 1:47 pm

African Imp wrote:
I am now no longer allowed to post images :(
What happened there then?
Only a slight hiccup in visual effects.
As it seems to be up and running again.

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Re: A Californian drying out in South Africa

Post by African Imp » Wed Aug 07, 2019 5:21 am

Bobbycham wrote:
African Imp wrote:
I am now no longer allowed to post images :(
What happened there then?
Only a slight hiccup in visual effects.
As it seems to be up and running again.

Bob Imp005
Indeed, I find a picture says more about what the issue or problem is and helps make some sense of things?
Another system of image posting is now in use, the same system as the British Seagull site I am on uses, once understood its ok to use?
Last edited by African Imp on Fri Aug 30, 2019 6:58 am, edited 1 time in total.
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Re: A Californian drying out in South Africa

Post by moose » Wed Aug 07, 2019 12:49 pm

Have you tried changing the rotor arm? only thing that has stayed the same? could be arcing out
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Re: A Californian drying out in South Africa

Post by African Imp » Wed Aug 07, 2019 12:52 pm

moose wrote:Have you tried changing the rotor arm? only thing that has stayed the same? could be arcing out
Yes, it is three now, plus two distributors, with very little change between any of them.
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Re: A Californian drying out in South Africa

Post by African Imp » Wed Aug 07, 2019 1:01 pm

Bobbycham wrote:
African Imp wrote:
I am now no longer allowed to post images :(
What happened there then?
Only a slight hiccup in visual effects.
As it seems to be up and running again.

Bob Imp005

Bob, again I can no longer post images and todays was to be a classic one :D
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Re: A Californian drying out in South Africa

Post by The Nun » Wed Aug 07, 2019 2:23 pm

Have you done a compression test to rule out anything on the valve sealing side?
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Re: A Californian drying out in South Africa

Post by Bobbycham » Wed Aug 07, 2019 5:44 pm

Maybe you should change your avatar for the latest picture?

Classic picture ?????????
was it Bob Ferris & Terry Collier out on the pull or Trigger offering Del a pork pie?
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Re: A Californian drying out in South Africa

Post by African Imp » Wed Aug 07, 2019 6:01 pm

Bobbycham wrote:Maybe you should change your avatar for the latest picture?

Classic picture ?????????
was it Bob Ferris & Terry Collier out on the pull or Trigger offering Del a pork pie?
Bob Imp005
No, it was Eric Wells on the pull.
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Re: A Californian drying out in South Africa

Post by African Imp » Thu Aug 08, 2019 6:08 am

The Nun wrote:Have you done a compression test to rule out anything on the valve sealing side?
No, Other than by placing my finger over the plug hole that is not possible for me.

Two days later:

What a difference a day can make, I have now been given a compression tester!
Last edited by African Imp on Fri Aug 09, 2019 10:19 am, edited 1 time in total.
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Re: A Californian drying out in South Africa

Post by moose » Thu Aug 08, 2019 10:21 am

You will get a better answer carrying out a cylinder leak down test rather than compression test.
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Re: A Californian drying out in South Africa

Post by African Imp » Thu Aug 08, 2019 10:44 am

moose wrote:You will get a better answer carrying out a cylinder leak down test rather than compression test.
Please explain how a down test is done?
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Re: A Californian drying out in South Africa

Post by moose » Thu Aug 08, 2019 11:39 am

Reverse of a compression test. Piston at TDC on compression stroke, lock engine in postion (big spanner on crank pulley) using a test kit T piece with two gauges and isolation valve. Open valve fill cambustion chamber with 100 PSi. on gauge 1 you will see 100 psi. On the other gauge you will see the gauge fall as pressure leaks out of engine (there is a calibrated orifice between gauges) some gauges give you the percentage some another figure and you have to do maths. Hiss out of carbs inlet valve and seat passing. Hiss out of oil filler cap hole/breather system rings are passing. You can buy the kit to do it easily.

up to 20 % loss is acceptable for a road engine any more and re-build time

1 to 10 % loss for a competition engine

As with all tools the really cheap ones are a waste of time and you can pay a fortune for something you may not use often so buy a brand you know do not just go for lowest price.
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Re: A Californian drying out in South Africa

Post by African Imp » Fri Aug 09, 2019 7:45 am

Moose, thanks on the information on the compression test. :D
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Re: A Californian drying out in South Africa

Post by African Imp » Fri Aug 09, 2019 7:52 am

With a Hillman Imp in my Imp Californians normal parking place it is time to cover the Californian with a dust sheet cover and get on with the other Imps work list.

The engine came out yesterday, to day I rebuild the water pump assembly ( new pump ) then clean and flush out the radiator ready for the refit of the cars correct numbers engine on the licence papers.

That engine was used in the Californian, the Singer and also the Mk2 Imp, the years fly by and engines get changed etc.
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Re: A Californian drying out in South Africa

Post by African Imp » Fri Aug 09, 2019 10:12 am

I have just been gifted with a brand new Equus compression tester, so many things are now possible?

Excepting for me posting an image that is :(
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Re: A Californian drying out in South Africa

Post by moose » Fri Aug 09, 2019 10:45 am

A compression tester will tell you if you have a problem by comparing the 4 cylinders but will not tell you what is causing the problem i will make some figures up to get the info across

number 1 200 psi compression test (this will be classed as OK)

number 2 185 psi compression test (this will be classed as within tolerance but could be leaking on inlet valve side so that port is contaminated with unburnt air/fuel mixture and exhaust gasses passing back into inlet port contaminating the next mixture coming in to fill cylinder. The lack of compression also prevents a complete burn and the contaminated mixture changes the colour you will read on a plug)

Number 3 190 psi compression test ( as above but oil contamination in the bore due to worn rings similiar issues to the above)

Number 4 175 psi classed as outside acceptable tolerance but what is causing it.

That is a broad statement and obvioulsy made up to prove how good a leak down test is for diagnostics compared to a compression test.
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Re: A Californian drying out in South Africa

Post by African Imp » Fri Aug 09, 2019 5:50 pm

Moose, many thanks, am I correct that before I test for cylinder compression I would need to go for a drive to bring the engine up to normal running temperature?
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Re: A Californian drying out in South Africa

Post by moose » Sat Aug 10, 2019 6:52 am

To carry out a leak down test and gain results that relate to how the car is running yes it is best to carry out at normal running temp. This can show up a tight tappet gap that prevents a valve fully seating when valve and head etc are hot an have expanded. It also ensures the piston rings and pistons have expanded into the bores and have a coating of oil. You can do it cold and on a fresh correctly built engine you will get a good figure lets say 10% or less that should stay the same or improve on an engine at temp. On a used engine you may have 25% leak down that comes to 18% at temp so the engine is fine to use this does not apply to competition as you will be losing performance ifyou are not in the sub 10% area.
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Re: A Californian drying out in South Africa

Post by African Imp » Mon Aug 12, 2019 6:21 am

Moose, As I now have the Equus Compression Tester I will start with that first.

As I am now into an engine change on a friends 1967 Hillman Imp that will be a job for the comming weeks only.
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Re: A Californian drying out in South Africa

Post by African Imp » Wed Aug 14, 2019 9:45 am

Have you noticed that I no longer post pictures?

This is due to the program red lining them now.

I have just met the owner of a carburetor service shop, I was introduced to him as a Hillman Imp owner.

The discussion turned to Strombergs of course, he agrees with me that they are good for the job , if you set them up correctly.

This confirms my own feelings on them :) Imp027
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Re: A Californian drying out in South Africa

Post by African Imp » Wed Aug 14, 2019 12:03 pm

Are picture posts a thing of the past now?

It would be a shame if that is the case and will be the time for me to venture to some other forum that allows them?
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Re: A Californian drying out in South Africa

Post by African Imp » Tue Aug 20, 2019 7:36 am

All my posts are now hidden, I mailed the contact address and as yet I see no reply?
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Re: A Californian drying out in South Africa

Post by eebiegeebie » Tue Aug 20, 2019 8:07 am

African Imp wrote: All my posts are now hidden
Hidden in what way Roy? I can see them.
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Re: A Californian drying out in South Africa

Post by The Nun » Tue Aug 20, 2019 8:22 am

I can see everything what you wrote. :D
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Re: A Californian drying out in South Africa

Post by African Imp » Tue Aug 20, 2019 8:52 am

The thread A Californian drying out in South Africa is here, I cannot see the link to my various other posts though.
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Re: A Californian drying out in South Africa

Post by eebiegeebie » Tue Aug 20, 2019 9:01 am

I've looked on the various other forum sections and I can see loads of threads from you. If I click on your name, then "Search user's posts", all sorts of things come up, including threads other than this one. It doesn't look like anything is being hidden??

Try this link, which essentially searches the forum for all topics by you.....

search.php?keywords=&terms=all&author=a ... mit=Search
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Re: A Californian drying out in South Africa

Post by African Imp » Tue Aug 20, 2019 3:05 pm

The Nun wrote:
Wed Aug 07, 2019 2:23 pm
Have you done a compression test to rule out anything on the valve sealing side?

As I now have a new Equus compression taster I will be testing the bores as soon as the 1967 Mk2 rebuild is finished ( not my own ) petrol tank in and then out, gear shift assembly taken out, changed the transaxle, fitted an L4 cylinder head to the rebuilt motor, all done, well I still have to refit and test the engine ! Imp011

Three weeks of near daily work later and the car was driven away by Eric who once more has an Imp to drive :(
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Re: A Californian drying out in South Africa

Post by African Imp » Wed Aug 28, 2019 12:45 pm

Three weeks ago today I took delivery of an RSA built 1967 Hillman Imp with the idea of doing some works to help the owner who is a long time good friend, I was not to know that one job would then become another and that would then be followed by another.

The petrol tank was removed twice, the entire gear shifter and linkage came out as the flexi joint was solid on the transaxle selector shaft, the transaxle was also swopped for a second one, new seals had to be fitted of course, the series 180 Sport head was changed for an L4 and the very nice Janspeed type exhaust manifold was changed for a brand new Sport type which was more suitable for the engine.

The L4 cylinder head was fitted with better valve guides and also new valves. The Stromberg carb set with the lower hex jet adjusters was changed for a later type, then back to the ones I removed. A new water pump was fitted, I later found out that it was an imported ebay special, which possibly explains why it leaks?

It was a long hard three weeks, with one day off and one working session that I need a rest from?

Eric drove his car away yesterday and I then parked the Imp Californian back where it belongs, the Imp Californians engine had not been used the past month, it started first time since being parked and the car covered with a dust sheet.:D
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Re: A Californian drying out in South Africa

Post by African Imp » Wed Aug 28, 2019 1:43 pm

By way of a change and a rest, I have restarted the square (almost) rear number plate, the original paint job required flatting down with waterpaper, I then etch primed it with four coats of sprayed on primer.

I now need a satin black to finish the black coating with, a rattle can paint may be the best idea for the paint?

Please excuse the poor paint finish and the white letters and numbers that I cut out of paper :)

That was my demo layout to see how the printing shop will do the actual layout.

Note, the rattle can paint was rubbish, just not enough body or grip to the four coats of spray applied twin pack primer. I have now had a rethink on the process and if I am to refinish the alloy and GRP panel with black paint it needs to be from a decent source, not a rattle can :(
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Re: A Californian drying out in South Africa

Post by African Imp » Thu Aug 29, 2019 6:55 am

For those who are wondering why I have posted the info and picture of a white Hillman Imp, there was a gift of the owners stock of Imp related parts and tools that came with the deal, most unexpected really but as he was about to sell the car he was not about to need those parts anymore?

As things worked out the car remains unsold and some parts are in a box ready to return to him.

One part that came to me is a new Rootes engine mounting for the Hillman Imp, part number 7100346, I will fit the assembly later today :D
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Re: A Californian drying out in South Africa

Post by African Imp » Thu Aug 29, 2019 7:09 am

The new rear number plate took a step forward yesterday, I had wet sanded it and applied the four coats of etch primer.

Next was to apply the black satin cover coats, which turned out to be a failure as the thickness of the paint was just too thin, it would not bond to the primer well either.
This job is now taking a rest.
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Re: A Californian drying out in South Africa

Post by African Imp » Thu Aug 29, 2019 2:20 pm

A compression test of my original bore engine has been discussed recently.

As I now have a nice new Equus compression tester I have just tested pistons number one and number two, I was expecting number two to show a lower pressure?

I was quite wrong as if anything it shows a very small increase over piston number one :D

The engine was run for just a short while to get some warmth into it, what is a good pressure supposed to be?

I will test piston three and four tomorrow.

One and two pistons read just over 800 Kpa on the scale.
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Re: A Californian drying out in South Africa

Post by The Nun » Thu Aug 29, 2019 2:34 pm

what is a good pressure supposed to be?

185 to 200 lbs/sq in thats per the workshop manual, if the reading falls outside this the engine needs overhaul or renewing which can be obtained from you local Rootes dealer. :D
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Re: A Californian drying out in South Africa

Post by African Imp » Thu Aug 29, 2019 2:48 pm

I have checked, 810 Kpa is 117 pounds so I am way way down on compression, the engine still runs rather well and uses no oil though.
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Re: A Californian drying out in South Africa

Post by Dave ' Linwood ' Lane » Thu Aug 29, 2019 3:54 pm

African Imp wrote:
Thu Aug 29, 2019 2:48 pm
I have checked, 810 Kpa is 117 pounds so I am way way down on compression, the engine still runs rather well and uses no oil though.
That is low :shock: , thats around 7 to 1 comp ratio compared to the 10 to 1 its supposed to be , even a low comp van engine is 8 to 1 ( 140psi ) , last time i tested one of mine all 4 were on 175 psi
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Re: A Californian drying out in South Africa

Post by moose » Thu Aug 29, 2019 4:02 pm

Did you carry out the test with the throttle wide open?
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Re: A Californian drying out in South Africa

Post by African Imp » Fri Aug 30, 2019 3:01 am

I will re test compression today and with the help of Jean who can keep the throttle peddle down to the floor for me while I test at the engine end :) Imp027
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Re: A Californian drying out in South Africa

Post by African Imp » Fri Aug 30, 2019 6:50 am

At the time Jean was not available, Mr Sledge Hammer was, the pressure has now increased to 1000 Kpa, better by nearly 200 Kpa but still well off what it needs to be :(
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Re: A Californian drying out in South Africa

Post by African Imp » Fri Aug 30, 2019 6:51 am

This Equus pressure gauge is a new device to myself, I now know more than I did before :)

With a warm engine (not hot) the throttle held open, piston one now reads nearly twenty five percent higher and at 1000 Kpa.

So now I have 145 pounds pressure, I am still short by 40 pounds, there is little I can do if I do not want to rebuild the engine with the spare 0.030" piston set that Bob Allan sent me, near new and with new Repco pistons rings that I have in stock.
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Re: A Californian drying out in South Africa

Post by moose » Fri Aug 30, 2019 7:55 am

You still do not know what is letting the pressure escape. Could be worn exhaust valve seats, could be worn inlet valve seats, could be valve clearances, could be piston rings, could be oval bores, could be tapered bores, could be all of them.
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