problem with oil pressure 0 in morning

butziporsche944 · 02-12-2006, 06:13 PM

ok now here is my problem I just bought my 86 944 5spd.2 months ago and it run great and all but 2 week ago I HAVE AN OIL PRESSURE PROBLEM WITH this 944

In the morning at cold star I get 0 oil pressure and takes exact 30 seconds to bum! full pressure"from here all day engine runs great actually it can be park for 2 hrs and be star again and the oil pressure is full at crank point, I noted a funny sound in valves like dry before get full oil pressure each morning, I check all over oil is brand new it is clear (could it be oil pump that is not keeping oil inside it during time car is park for long hrs )DOES ANYBODY KNOW WHAT THIS COULD BE AND HOW TO RECTIFY IT? I'm trying to figure out what might be the problem. can anyone help me out.

pd. do you guys think main bearing could be damage for the 2 weeks that car is being start and there is not full oil presuare for the first 30 seconds !

CJFusco · CJFusco's Garage

sounds to me the sensor might be malfunctioning?

butziporsche944 · 02-12-2006, 06:41 PM

honestly I don't think sensor! because you can hear the valves funny noise like they are without good lubrication in tower of engine for first 30 seconds ones I get full oil presure in gauge noise is gone after that. (I guess mean engine is running without real full preasure for half second until pump charge and send I guess?or what could be !!I want avoid new pump is too $$$$

SoCal Driver · SoCal Driver's Garage

Bad sender? Not when he hears the valve lifters rattle until the gauge indicates any pressure.

What brand filter did you use? Best to use the Mahl that is recomended for the car. Could also be a bad o-ring in the oil pressure regulator or even a cracked oil pick up tube.

Where in california are you?

When was the last time the timing and balance belts were changed?

CJFusco · CJFusco's Garage

oh i read the lifters part in the original part wrong... yeah, I retract my sensors suggestion

Granite 944 · 02-12-2006, 07:27 PM

Quote:

Originally posted by butziporsche944
ok now here is my problem I just bought my 86 944 5spd.2 months ago and it run great and all but 2 week ago I HAVE AN OIL PRESSURE PROBLEM WITH this 944

In the morning at cold star I get 0 oil pressure and takes exact 30 seconds to bum! full pressure"from here all day engine runs great actually it can be park for 2 hrs and be star again and the oil pressure is full at crank point, I noted a funny sound in valves like dry before get full oil pressure each morning, I check all over oil is brand new it is clear (could it be oil pump that is not keeping oil inside it during time car is park for long hrs )DOES ANYBODY KNOW WHAT THIS COULD BE AND HOW TO RECTIFY IT? I'm trying to figure out what might be the problem. can anyone help me out.

pd. do you guys think main bearing could be damage for the 2 weeks that car is being start and there is not full oil presuare for the first 30 seconds !

DAMAGE?.......No oil pressure for that long............HELLO!
How much.........who knows?

'86 car. Ya probably have the "early" OPRV. NOT an uncommon problem.

Take the OPRV out, clean it good, re-install.........all is good again. DON'T USE SANDPAPER TO CLEAN IT OUT WITH!!!!

Do a search here, its been beat to death on HOW to do it.

Hopefully, that will be the problem! I've seen it, a couple of times, and that was my problem. (I even have a "one peice OPRV to install, and NEVER HAD TO.......like SOME SAY TO DO).

Good luck!

butziporsche944 · 02-12-2006, 07:27 PM

well I spend $800 in full belts, rollers and tune up 2 days after bought car, my oil filter is MAHLE! , one mechanic check the car for 10 minutes he said was bad oil pump, need to be replaced charge $500 plus cost of pump.
the weird here is that oil keep good all days car runs great , is just in morning when I start , mechanic said pump is not keeping oil inside it like it should! drain all to pan!!or something like that , but oil pressure is good all day ,I take car for 80 miles trip to check and temperature ok and 4 bars oil all time , could be the oil pump slave bad! can I rebuilt pump what Else can be !!
pd I'm in San Francisco Bay

ae1969 · 02-12-2006, 07:32 PM

Quote:

Originally posted by butziporsche944
...........mechanic said pump is not keeping oil inside it like it should! drain all to pan!!or something like that ...........

Ding Ding Ding...........

As has been mentioned pull the OPRV out and have a look at it........

butziporsche944 · 02-12-2006, 07:35 PM

[QUOTE]Originally posted by Granite 944
[B]DAMAGE?.......No oil pressure for that long............HELLO!
How much.........who knows?

'86 car. Ya probably have the "early" OPRV. NOT an uncommon problem.

Take the OPRV out, clean it good, re-install.........all is good again. DON'T USE SANDPAPER TO CLEAN IT OUT WITH!!!!

sorry but what is the OPRV!! Can you be more specific please?

SlowToady · 02-12-2006, 07:48 PM

Oil Pressure Relief Valve.

If it fails, you get oil pressure problems. Like the one you're having.

butziporsche944 · 02-12-2006, 09:31 PM

Thanks ! just want to again show that my problem is at morning juts 30 seconds ( when I first crank car 0 presure and noise in lifters , but after 30 second get full pressure )and I drive the car all day non problem ! ones car is running idle pressure keep great 4 bars, (I search read other threats in ths forum with failure in OPRV everybody said they got good pressure at start and is when engine is warn that they notes drops low pressure or then from 4 to almost 0 !!my case is just at start , seem like when engine is stop for 8 or 10 hrs (at night park )all oil drop to oil pan !!!is this also OPRV FAIL ?IS DIRTY OR OPEN OPRV?OR IS OIL PUMP?
Sorry is that I don't want to buy a new oil pump $$$ if at the end the one in car is good and the problem will be dirty or bad oil presure valve!OR SOMETHING ELSE thanks

SlowToady · 02-12-2006, 09:45 PM

30 seconds, even at idle, is too long to be without oil pressure. I would stop driving the car, now, and check the OPRV out. I'm not a mechanic, and am not nearly as experienced as some other members here, but I would venture a guess that you've done harm to the rod bearings running it with no oil pressure. You may also have some piston/clyinder damage.

Before I scare the hell out of you, I'll let the pros chime in, since that above is nothing more than a semi-educated guess.

Except for what I said about 30 seconds with no oil pressure being too long. That's true. No oil pressure == very bad.

edit()

Try draining the oil into a large container with a magnet at the bottom (preferably a strong one, on the outside bottom of the container). Then pour that oil into a proper catch pan. Would be interesting to see if you have any metal shavings in the oil. If you do, they'll stick to the bottom of the container.

944 Ecology · 02-13-2006, 04:39 AM

Try tightening the front crankshaft bolt to 155 lb ft. Very common problem.

You should use the flywheel lock to do this.

CPorsche · 02-13-2006, 04:49 AM

Oil pumps rarely go bad on these cars. Seeing that after warm up you have pressure it is probably not the oil pump. 1st check the OPRV. If this is not the problem next check the pick-up tube and the pick-up tube O-ring. Also be sure the crankshaft bolt is torqued to 160 ft/lbs so that the oil pump drive sleeve is not slipping.

rammstein · 02-13-2006, 07:03 AM

I don't know anything about how to fix it, but I think you need to stop driving it until you fix the problem. $500 can turn into $2000 in the blink of an eye.

BTW- welcome to the board. Listen to guys like AE1969 or SoCal Driver. They are like Yoda.

SoCal Driver · SoCal Driver's Garage

Just had my Yoda Kola this morning.

Listen carefully to the FORCE Puke Skywater;

Pull the oil pressure relief valve and replace the o-rings!

(My last post to this thread)

butziporsche944 · 02-14-2006, 09:23 PM

Can you or somebody!!please
explain how take the OPRV OUT what areas clean and HOW TO PUT IT BACK PROPERLY please! help.......
p.d I alredy bought all o rings and washer!

earlr85944 · 02-15-2006, 03:37 AM

goto http://clarks-garage.com/
click garage shop manual on left side of page, and you will be at an extensive repair guide

goto LUBE-01, Oil Cooler General Information and Seal Replacement

modify the procedure to remove the pressure relief valve not the complete oil cooler. read the whole article and torque the valve to the required lbs,
but basically:
Remove plastic under-tray. (if you have it,
Remove two 8 mm. bolts (13 mm. head) from upper right sway bar mount and pull it down.
Remove oil pressure relief valve from oil cooler housing, using a 24 mm. socket.

you can clean it with gasoline, then clear water, replace o ring and seal ring, coat with light oil for reinstallation. no need for alignment tool if you don't loosen the housing.

hopefully this is not trolls work.

jwade944 · 02-15-2006, 06:01 AM

Definitely check the oil pressure relief valve and the crank pulley bolt. Since some mechanics remove the crankshaft pulley to replace the belts, I would definitely check the torque on the bolt. It takes a 24mm socket and the flywheel lock with a stout torque wrench to get it to spec. You don't say if this car has ever had the head off, but if so, there is a check valve in the head. The valve is basically just a small steel ball and is frequently lost when the head is removed. Without it there will be a few seconds before the lifters prime - but 30 seconds seems too long. You might also want to replace the oil filter. I know it is new, but the internal check valve on it may not be working properly. I would be very surprised if this was the oil pump.

butziporsche944 · 02-15-2006, 02:54 PM

Thanks guys I will check OPRV and try clean it good !!!! I WILL USED GASOLINE TO CEAN IT AND THEN PUT NEW O RINGS I really want thanks all people for big help !!!I will be posting the resoults in next 10 days!!