This is topic BIG oil pressure problem in forum Tech Talk at Northern California Ford Owners  .


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Posted by 90hogg (Member # 5313) on :
 
Engine has less than 3k but Im on my third oil pump. After about 1000 miles it loses pressure at idle. Hit the gas and it goes up and back down. Ive had 2 melling hv pumps and now the fms one. All did the same thing. Please help.
 

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Posted by SilverLX351 (Member # 3207) on :
 
sounds like an internal problem, like bearings maybe...I would pull the motor and check it out.
 

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Posted by 90hogg (Member # 5313) on :
 
Could this have been a bad install? Dss 347 kit bored 40 in fms block.
 

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Posted by SilverLX351 (Member # 3207) on :
 
How does the oil look?? is there any metal in it, or at the bottom of the pan?
 

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Posted by JohnB (Member # 969) on :
 
After 3 pumps, I'd say it's not a pump.

Pull the engine, check the #5 main and #4/#8 rod bearings. If they look good, pull the cam and check those bearings. What were the clearances when the engine was assembled? Please say someone checked them...and didn't just put it together...
 

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Posted by 90hogg (Member # 5313) on :
 
I will check the oil and ask the installer if he checked the clearances. Thanx for the input thus far.
 

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Posted by 90hogg (Member # 5313) on :
 
Nothing in the oil and the installer said he clearanced eveything. May have to pull the engine and check those bearings.
 

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Posted by SilverLX351 (Member # 3207) on :
 

quote:

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Originally posted by 90hogg:
May have to pull the engine and check those bearings.

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Thats what I would do, GOODLUCK

[ May 24, 2005, 09:44 AM: Message edited by: SilverLX351 ]
 

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Posted by CDT (Member # 5004) on :
 
what are the pressures your getting??? Are you sure about the galley pulg at the back of the lifter valley?
 

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Posted by HungryHippo (Member # 537) on :
 
do you have a hardened oil pump shaft? maybe something is binding and breaking your oil pumps
 

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Posted by 93lx342 (Member # 1793) on :
 
oil pump drive shaft may be to long forcing it to grind into baseplate of pump which will cause the pump to work less efficiently.
 

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Posted by 90hogg (Member # 5313) on :
 
I do have an ARP hardened shaft. Should I change it because it may be too long?
 

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Posted by 93lx342 (Member # 1793) on :
 
just put distributor in and look at where it meets the block.if it is not seating all the way the shaft may be to long and causing the problem.
 

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Posted by 90hogg (Member # 5313) on :
 
Pulled the k-member and the pan. Pan had metal bits in it. The #4 and #8 rod bearings were damaged. Im going to replace the pump and the rod and main bearings. Should this get rid of my problem?
 

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Posted by TRIXSNK (Member # 2844) on :
 

quote:

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Originally posted by JohnB:
After 3 pumps, I'd say it's not a pump.

Pull the engine, check the #5 main and #4/#8 rod bearings.

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Posted by getjobdone (Member # 4666) on :
 

quote:

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Originally posted by TRIXSNK:

quote:

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Originally posted by JohnB:
After 3 pumps, I'd say it's not a pump.

Pull the engine, check the #5 main and #4/#8 rod bearings.

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i agree
 

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Posted by 90hogg (Member # 5313) on :
 
The number 3 main bearing was shot and the number 4/8 rod bearings were damaged, crank also had damage. The oil pump also had shavings from the bearings inside it. Can anyone tell me what caused this. And what to do so this problem is resolved. My installer replaced the pump, bearings and the crank with new ones. I just dont want to go through this Sh*t again.
 

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Posted by JohnB (Member # 969) on :
 
What caused it? 1 of 3 things...
1. Your installer did not check thrust clearances or crank clearances.
2. You bought REALLY CHEAP bearings...
or 3. You beat the beeee-jeeeezus outta it.

I hope he completely tore down that block and hot-tanked it, as well as replacing the cam bearings. In not, you're asking for trouble.
 

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