My last message was a replt to Grant's exellent and informativee mail , and
after sending it I realised he just sent it to me , he must be modest ! Anyway
here it is for those interested.
Grant Galbraith wrote:
>
> Any suction side leak will pump air into the oil system. Lifters don't
> like air.
> Were you noisy lifters acting up after highway runs but quiet after
> idling a while Quiet when first started? This is a symptom of air in you oil
> system.
> If so you can try dropping the pan and sealing leaks in the pump and
> pickup tube. I pressure checked mine with leak tek (soapy water will work)
> Leaks occur at the cover, pickup tube joint and pressure relief valve.
> If your attempts to seal leaks don't quiet the lifters, mine didn't,
> there is one last thing to try that worked for me. Tom Langdon at Stovebolt
> Engine suggested it. I tried it, it worked and he has been giving me credit
> for it. I won't argue but it was his idea.
> In my case I had two or three lifters that were noisier than the others.
> I picked the one nearest the oil supply and removed for some re-operation.
> Grind a .003 to .005 flat in the side of it, from the recessed part up. This
> allows air to vent out instead of being pumped into the lifter. Doing this
> to just the first one worked to quiet down all the rest. I has almost given
> up on hydraulic lifters before I tried this. Tom say's this will drop your
> oil pressure 1 psi per lifter, but I didn't notice any difference on just
> one.
>
> Grant
> 50 Chevy 3100
> 52 GMC 150
>
>
>
>
>
>
>
>
>
>
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
|