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Post by kelsham on Sept 13, 2011 8:26:32 GMT
I was all set up for a journey to the Beaulieu Autojumble when I discovered that my modern car exhaust was disintegrating beneath it.
As the time was short I needed another car, cue the landcrab.
A quick check, oil, water, brake fluid and tyres. and I pronounced her ready for the coming 450 mile round trip.
Stowed a shopping trolley aboard and filled the boot with the cases that Yvonne says we cannot do without.
Friday morning we left mid Wales, I still have a 74 degree thermostat contolling the cooling. I noticed a slight hesitation when running on a trailing throttle.
Beaulieu acomplished, on the return journey loaded down with spares and much lighter in the wallet, the car ran well until we entered Wales.
It then suddenly began to miss on acceleration and up hills. It was bad enough to make me think it might fail completely.
I tried pulling out the choke, normal service resumed. Obviously an obstruction in the carb. Still slightly uneven running on trailing throttle.
I have bought a 82 degree stat while at the Autojumble. I will fit it and report back.
Regards Kels.
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Post by dave1800 on Sept 13, 2011 8:46:14 GMT
Hi Kels Sounds like you want to compete with Tommy  Hope you get it sorted regards David |
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Post by tommydp on Sept 13, 2011 11:20:31 GMT
Sounds familiar, perhaps they have the same illness..
I have given up, and put the damn thing inside the barn again. So there it is, shiny as new but impossible to use..
Good luck to you though:-)
Regards, Tommy.
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Post by kelsham on Sept 13, 2011 15:42:07 GMT
yes, I think Tommy and I have made the mistake of trying to mix and match parts from different set ups.
I have just fitted the new thermostat, I was disappointed to find it already had a 82 centigrade thermostat fitted. I had become confused and believed I had a lower switching value fitted.
Naturally it gave the same performance on the road as before. The car does not run as smoothly at steady speed as I expect. I will get round to another round of checks. Ignition and carb. I did have a problem with uneven compression readings last time I checked. I will probably start there.
I have to many cars and projects, One BSA trike 1932, one 1931 fourwheeler BSA both vee twin engined and an XJS Jaguar, Rover 100 cabriolet, not to forget the landcrab and a Rover 25.
My son has just phoned and told me he is bringing his car over because the brakes are noisy,
could not think quickly enough of an excuse.
Regards Kels.
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Post by Penguin45 on Sept 13, 2011 17:28:55 GMT
My son has just phoned and told me he is bringing his car over because the brakes are noisy, could not think quickly enough of an excuse. Supervise.......... These youngsters have to learn. Chris. |
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Post by tommydp on Sept 13, 2011 17:30:39 GMT
We will solve it one day, Kels:-) I'm sure! But who knows when!?
In my case the compression is spot on 180 on all cylinders. I'm 90 % certain the problem is from worn valve guides and oil fouling the plug makes it miss sometimes. Any oil getting to the firing end of the plugs on yours?
Is your engine a low compression unit, or do I remember wrong? If so, is your distributor suited to the engine?
Regards, Tommy:-)
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Post by dave1800 on Sept 14, 2011 2:51:59 GMT
Tommy you disappoint me, what would your students think. I'm sure you tell them never to give up!  Sounds familiar, perhaps they have the same illness.. I have given up, and put the damn thing inside the barn again. So there it is, shiny as new but impossible to use.. Good luck to you though:-) Regards, Tommy. |
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Post by dave1800 on Sept 14, 2011 2:55:18 GMT
Chris, I agree! As age catches up with me it is far easier to use what's left of the brain cells, while they still partially function, than spend hours crawling under the car and aching all over the next day!. The only way I learned was hands on. regards David My son has just phoned and told me he is bringing his car over because the brakes are noisy, could not think quickly enough of an excuse. Supervise.......... These youngsters have to learn. Chris. |
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Post by kelsham on Sept 14, 2011 7:48:54 GMT
As to my son I would rather take charge than visit him in hospital, he seems to think that attacking mechanical problems at high speed will confuse them and get them to give up.
He tried to take the front wheel off with the car not jacked up. He is clever in other ways and always grateful for help.
I have fitted high compression pistons and changed the distributor to suit, changed all electrical components in the ignition circuit. The carb has had a new needle and jet. I am running the later carb and manifold with the straight breather pipe into the carb.
Pulling out the choke always seems to work as a temporary measure. the problem is most noticeable when running at a steady speed, it presents as a slight hesitation as if the car wants to pull up. pressure on the accelerator clears the problem.
Two new petrol pumps have been tried one electronic points, currently on correct new S.U.
I have also replaced the rear rubber pipe from the pump.
S.U. cleaned till my fingers hurt. Jet adjusted on the bench for clearance. I have travelled over a thousand miles with this fault.
I have relations arriving today for a few days, I will then start again, Does any one have a later S.U. surplus to requirements? I suppose a replacement would eliminate the carb.
Regards Kels.
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Post by dave1800 on Sept 14, 2011 10:18:01 GMT
Air leak under high vacuum at steady speed running and or ignition timing needs adjusting (too retarded). Remember that under light throttle settings that the SU carb tends to (is designed to) run weak, contributing to its good economy, the downside is that you need a stronger spark to ignite a weaker mixture which will show up any problems with the spark plugs, plug leads, distributor cap, rotor arm, capacitor, coil, wiring etc - I do feel a "Tommy thread" starting here! Regards David |
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Post by tommydp on Sept 14, 2011 21:48:07 GMT
Dave: I have not given up for good:-) I really needed a break from it though:-) I'm getting back to it soon, looking at the cylinder head first. I really don't know what else to look for when it comes to fuel and ignition. Like Kels, I have been into everything obvious. Numerous times.
I must say Kels' trouble sounds a lot like mine. How are your plugs after a drive, Kels? number two and three still look weaker on mine, and number one gets fouled by oil at idle.. Is your car missing at idle too? Is there any blue smokewhen opening throttle after rolling downhill with throttle closed? Mine has the blue smoke. I suppose if the valve guides are worn to the point where oil is sucked in, they will allow unmetered air to enter the combustion chamber, making correct mixture impossible.
Regards, Tommy:-)
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Post by Penguin45 on Sept 14, 2011 23:05:55 GMT
Quick and easy fix for the valve guides is to get a set of the American ST2001 stem seals. They work (Unlike the standard BMC ones...).
Chris.
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Post by kelsham on Sept 16, 2011 12:44:15 GMT
Hi Tommy I have been wondering if you have the o rings fitted to the valve stems? just a passing thought.
My relatives arrived for a couple of days visit in a citroen which looked as if it was a competitor of the Smart car, lack of passenger space.
As Yvonne insisted we take them out to visit Stokesay castle, the landcrab was pressed into service once again. Curiously enough it ran without missing a beat there and back. It seems to be toying with me.
Regards kels.
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Post by tommydp on Sept 16, 2011 17:54:38 GMT
Hi Kels:-) Nothing beats the cabin space of a crab:-)
Our crabs must be closely related! It always seems as if mine is playing up with me too:-) Pulls like a train one day, the next day sluggish... Definetely the worst kind of trouble to solve! I really scratch my head!
I do have the valve stem oil seals in place.
Regards, Tommy.
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Post by dave1800 on Sept 17, 2011 0:27:53 GMT
LOCI members will see an article in the Autumn 2011 edition (pages 28-31) written by Christiaan Linford about his recent trips around the Dutch, Belgian and German hills in his Wolseley 18/85 S and guess what - a series of misfiring that has now disappeared without the cause really being diagnosed. Sound familiar?
I also wrote a short article (P38) about the number of Landcrabs left based on the website brought to our attention here by "rally1800s". I also took the opportunity to promote this forum.
regards
David
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