Dropping Oil pressure Help
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From: Virginia Beach, Va
Dropping Oil pressure Help Here is my problem. Just recently I replaced my timing chain and switched from the MMS 224v3 to the 229v2.1 . After putting the car together I noticed that the warmer the car got the lower the oil pressure would go, until it hit the first line and remained there. Before it was up at 38-42 almost all the time under normal and hotter temperatures. What I mean is, I start the car it warms up and the pressure drops a little like it normally would. Then I would be stuck in traffic or idle for a long while (10+ min), the oil pressure would slowly start going down until it rests a tad below the first line. When I rev the engine or start going the pressure will got back up to 38-40 until my rpms drop to below 1400 or so.
The o-ring is in the pump, made very sure of that. The oil has been changed. Always have run Mobil 1 synthetic 5w-30. What could possible be causing this. It has me very concerned.
Thanks in advance
John
The o-ring is in the pump, made very sure of that. The oil has been changed. Always have run Mobil 1 synthetic 5w-30. What could possible be causing this. It has me very concerned.
Thanks in advance
John
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Re: Dropping Oil pressure Help What year?
If it's not an '02, I'd replace the pump. If it was "disturbed" it may have gone to rest...
SC
Also, I use RP 5W30. Compared to that, M1 is warm **** water. It's WAY thinner than the RP.
<small>[ May 31, 2002, 10:52 PM: Message edited by: SS00Blue ]</small>
If it's not an '02, I'd replace the pump. If it was "disturbed" it may have gone to rest...
SC
Also, I use RP 5W30. Compared to that, M1 is warm **** water. It's WAY thinner than the RP.
<small>[ May 31, 2002, 10:52 PM: Message edited by: SS00Blue ]</small>
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From: Virginia Beach, Va
Re: Dropping Oil pressure Help I do agree it does get lower at higer temps, but this is very abnormal. I had the same oil filter and oil that was in the car before I changed the cam. Then I changed my oil and still had the same problem.
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Re: Dropping Oil pressure Help you might have a clogged pump. if you've ever taken one of these oil pumps apart, you know that the intake line is pretty small to start with and it's very possible that you might have a piece of crud lodged in the pickup or the pump itself. good luck
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From: Aub, Fl
Re: Dropping Oil pressure Help </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by TRYMYZ:
<strong>I do agree it does get lower at higer temps, but this is very abnormal. I had the same oil filter and oil that was in the car before I changed the cam. Then I changed my oil and still had the same problem.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Is the weather getting hotter maybe? mine always drops in hot weather, at an idle it will drop down to about 37-39 when it's hot and the motor is warmed up from sitting in traffic.
<strong>I do agree it does get lower at higer temps, but this is very abnormal. I had the same oil filter and oil that was in the car before I changed the cam. Then I changed my oil and still had the same problem.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Is the weather getting hotter maybe? mine always drops in hot weather, at an idle it will drop down to about 37-39 when it's hot and the motor is warmed up from sitting in traffic.
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From: Green Oak, MI
Re: Dropping Oil pressure Help Before you go and check everything under the sun get a real oil pressure gauge and check it again.
The stock gauges are only good to tell you its too late, your out, and you just spent alot of money <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
I've seen a stock gauge say 10psi but in reality it had 40.
The stock gauges are only good to tell you its too late, your out, and you just spent alot of money <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
I've seen a stock gauge say 10psi but in reality it had 40.
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From: Virginia Beach, Va
Re: Dropping Oil pressure Help I agree with the fact that the gauge may be inaccurate. But when the car is cold it give the correct pressure then slowly drop down to 20 (first line) or a tad below then will go back up when I give it gas.
John
John
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Re: Dropping Oil pressure Help </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Vents:
<strong>you might have a clogged pump. if you've ever taken one of these oil pumps apart, you know that the intake line is pretty small to start with and it's very possible that you might have a piece of crud lodged in the pickup or the pump itself. good luck</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I will agree on that its either clogged or your pump is going bad which I know you replaced but get it checked into at MMS if they did the install.I am sure they will correct it.They deal with these cars all the time.
<strong>you might have a clogged pump. if you've ever taken one of these oil pumps apart, you know that the intake line is pretty small to start with and it's very possible that you might have a piece of crud lodged in the pickup or the pump itself. good luck</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I will agree on that its either clogged or your pump is going bad which I know you replaced but get it checked into at MMS if they did the install.I am sure they will correct it.They deal with these cars all the time.
Re: Dropping Oil pressure Help </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by TRYMYZ:
<strong> But when the car is cold it give the correct pressure then slowly drop down to 20 (first line) or a tad below then will go back up when I give it gas.
John</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That's almost exactly what happens to mine. In traffic with hot idle, it only idles around 18 or so (according to the gauge). I thought my stock pump was going out, so I bought an ARE high volume pump and nothing changed (except for the fact that I was out an extra $215). It does read higher at WOT and cold idle startup than the stock pump though. I've heard it could be the oil sending unit but I haven't checked that out.
The car has been doing that for 2+yrs now. I've had the new pump in for over 1yr and have been driving it every day since...rain, snow, or sun.
<strong> But when the car is cold it give the correct pressure then slowly drop down to 20 (first line) or a tad below then will go back up when I give it gas.
John</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That's almost exactly what happens to mine. In traffic with hot idle, it only idles around 18 or so (according to the gauge). I thought my stock pump was going out, so I bought an ARE high volume pump and nothing changed (except for the fact that I was out an extra $215). It does read higher at WOT and cold idle startup than the stock pump though. I've heard it could be the oil sending unit but I haven't checked that out.
The car has been doing that for 2+yrs now. I've had the new pump in for over 1yr and have been driving it every day since...rain, snow, or sun.
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From: Virginia Beach, Va
Re: Dropping Oil pressure Help Ok I wasnt going to say it first, I wanted someone else to, but I have been talking to a few people and they say it is probably bearings. Either Cam bearing (more than likely most say) or rod bearings. There is no knock nothing abnormal, just low presure when hot. Gary thanks for the post I feel alot better now. Anyway, guys tell me what you think about the bearing scenario.
John
<small>[ June 03, 2002, 08:51 PM: Message edited by: TRYMYZ ]</small>
John
<small>[ June 03, 2002, 08:51 PM: Message edited by: TRYMYZ ]</small>
Re: Dropping Oil pressure Help Mine was doing the samething in warm weather at idle. I just recently installed the truck PCV and changed the oil and filter. Now it stays above 40 all the time and averages around 55 when warm and under normal driving conditions.
Re: Dropping Oil pressure Help </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by TRYMYZ:
<strong>So the truck PCV fixed the problem. Very interesting., What was the part # for that. I guess it is worth a try.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Either the PCV or the oil filter, I'm not sure which one fixed the problem. It's 100 degrees here today and idle is still above 40.
Part# 12572717 for the truck PCV $3.86 from my local dealer.
<strong>So the truck PCV fixed the problem. Very interesting., What was the part # for that. I guess it is worth a try.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Either the PCV or the oil filter, I'm not sure which one fixed the problem. It's 100 degrees here today and idle is still above 40.
Part# 12572717 for the truck PCV $3.86 from my local dealer.