Re: oil pressure

Posted by PackardV8 On 2011/12/17 11:41:10

THere is a number of possibilities causing the symptoms. The pressure relief spring could be faulty but that usualy causes low oil pressure as engine speed increases too. Could be a sticky or faulty pressure relief valve (like a little piston).

At this point u can either send the pump back to the rebuilder or disassemble the pump for an inspection.

First thing i would do if i had the pump in my hand is to check the wear at the input shaft. THere are some mechanics that can do this with reasonable accuracy of determining wear.

THe problem reported COULD be NOT pump related. Loose rod or main bearings, mite need LATE cam retainer, mite have early 55 rockers. Other possibilites.

If u decide to disassemble the pump for inspection we would all like to see pics of the parts and maybe we can determine the problem here. Otherwise u'll just have to take the mechanic and the vendors word/advice.


Edit: Note that the pressure relief valve piston for the LATE PUMP seems to be unobtainable. IT is NOT the same relief valve as used on mid-56 and earlier pumps nor is the spring.