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lost oil pressure Found the problem
#616066
02/17/10 08:04 PM
02/17/10 08:04 PM
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Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
rowin4
OP
master
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OP
master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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Lost oil pressure at the end of a run yesterday. Looked down as it was dropping to 0. Shut off the engine, coasted off the track. Checked the block , no holes, over full on the oil because of the accumilator, fired it back up , no oil pressure so I loaded it up. Today pulled the dizzy thought maybe the pump shaft may have broke or stripped, perfect shape, pulled the valve covers , thought maybe a rocker or push rod broke allowing a lifter to come out, every thing good there, pulled the pan, not a spec of anything in it. I have never heard of a big block pump going bad or do they. What should I look at next? Usually holds 45-50 at a hot idle and 70-75 hot at high rev's.  
Last edited by rowin4; 02/21/10 02:08 AM.
it's ok to butt heads, just don't do it with a butthead
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Re: lost oil pressure
[Re: rowin4]
#616067
02/17/10 08:35 PM
02/17/10 08:35 PM
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Joined: Mar 2003
Posts: 2,506
PA
moparacer
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master
Joined: Mar 2003
Posts: 2,506
PA
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How much oil did you drain out of it?
It didn't get low and uncover the pickup for a second did it?
67 Barracuda street/bracket car 11.27-119
68 Dart 502 BB 8.70s-152
414 cid SB Dragster 7.65-174
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Re: lost oil pressure
[Re: rowin4]
#616068
02/17/10 08:37 PM
02/17/10 08:37 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Lost oil pressure at the end of a run yesterday. Looked down as it was dropping to 0. Shut off the engine, coasted off the track. Checked the block , no holes, over full on the oil because of the accumilator, fired it back up , no oil pressure so I loaded it up. Today pulled the dizzy thought maybe the pump shaft may have broke or stripped, perfect shape, pulled the valve covers , thought maybe a rocker or push rod broke allowing a lifter to come out, every thing good there, pulled the pan, not a spec of anything in it. I have never heard of a big block pump going bad or do they. What should I look at next? Usually holds 45-50 at a hot idle and 70-75 hot at high rev's.
Well I guess your down to the pump or filter
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Re: lost oil pressure
[Re: Comp_Chassis]
#616074
02/17/10 09:44 PM
02/17/10 09:44 PM
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Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
rowin4
OP
master
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OP
master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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Drained out 2 1/2 galloons, pan 7 plus 3 accumitator. Lifter was the second thought, I checked them , all ok Both the gage's are mechanical , both 0. The filters a 2qt. wix racing remote, can't see that just plugging up. I'll pull the pump tomorrow and take a look.  
it's ok to butt heads, just don't do it with a butthead
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Re: lost oil pressure
[Re: 602heavy]
#616081
02/18/10 05:56 PM
02/18/10 05:56 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Oil pick up fallen off? 
Can that thing un-screw on a BB without crashing into
something(when the pan is on.... maybe broke off
but like some of the others I believe the by-pass
is stuck open
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Re: lost oil pressure
[Re: Rodney]
#616082
02/18/10 06:12 PM
02/18/10 06:12 PM
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Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
rowin4
OP
master
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OP
master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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Quote:
if the accumulator had oil in it wouldn't you have to have oil pressure for it have been full?
Yes that is correct , but as you lose pressure the accumulator empties to try to make up for the loss of pressure which it did. The engine has a external oil system , the pick up is a static mount , lines were all tight and nothing on the screen. I ordered a new pump today, don't want to have another problem with that one. Hope that's what the problem is. Thanks for the info guy's 
it's ok to butt heads, just don't do it with a butthead
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