I'm crossposting this to british-cars@autox.team.net
=================
-----Original Message-----
From: Jack W. Drews <vinttr4@geneseo.net>
To: shop-talk@autox.team.net <shop-talk@autox.team.net>
Date: Sunday, March 26, 2000 7:45 PM
Subject: Help for vintage car
>Please forgive me if this is the wrong list for this question, and if
>so, please direct me to the proper place.
Try british-cars@autox.team.net and riley@autox.team.net
The subscription method is the same as you used for shop-talk.
>I work on vintage race cars, and they are usually either nearly perfect
>or nearly disasters, either of which is easily diagnosed. I have a
>question
>regarding a car that is neither -- it is somewhere inbetween, and maybe
>somone can give me some helpful advice.
>
>A friend has a 1950 Riley that received a ground-up restoration 15 years
>ago.
>It has been driven about 500 miles a year since. It runs okay but leaves
>a continuous trail of blue smoke from the tailpipe. I'm trying to help
>my friend
>determine what is wrong and what needs to be done.
>
>Here's what I've checked so far:
>
>Timing and carburetor mixture are proper.
>Compression readings are 120 on all four cylinders
>Leakdown is about 15% on all cylinders.
>When accelerated, and then throttle closed, smoke does not increase when
>
>throttle is closed, usually indicating that valve guides are okay.
>
>Questions: Would the leakdown rate indicate enough ring wear to cause
>the smoke? With the low mileage the car has been driven, it would seem
>unlikely but
>possible. If the cause is carbon buildup because of the low and slow
>useage, is there something I can pour through it that might clean it up?
>
>Thanks in advance.
>--
>
>TR6 -- Spring!
>TR4 -- Sprang
>uncle jack -- Sprung
>
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