If the noise disappears as soon as there is oil pressure it must be a
bearing, main, big end, possibly camshaft (however not likely) which may
have slightly high tolerances. When the oil is hot it is thin and drains
away from the bearings, hence the noise with a hot engine and a restart
after a few minutes. As it disappears as soon there is oil pressure I
would not worry to much.
You could try Lucas oil stabilizer and see if there is any difference.
Kees Oudesluijs
Op 21-11-2019 om 17:41 schreef healeymanjim:
> before i tear my engine down i am going out one more time to see if anyone
> has ever encountered this condition before and
> the remedy. after about 500 miles on rebuilt engine detected a knock near
> front of engine. two conditions have to be met
> for this knock to occur. engine oil must be hot and it must have set for
> 10-20 minutes. will not knock on cold engine or
> upon immediate restart. knock ceases immediatly when oil pressure builds
> have plastigaged rods and the two middle main
> bearings. have checked all new lifters, pushrods and valve train. installed
> a new timing chain tensioner and damper. oil
> pump about 5 years old. have had piston slap and wrist pin suggested as
> culprit. any ideas?
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