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PostPosted: Mon Mar 18, 2013 4:29 pm 
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Joined: Tue May 01, 2012 6:26 pm
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Year and Trim: 1995 SSEi
Saturday was a great day for a drive so I took the old girl out for a good run. On the way back home I made a few hard acceleration passes and everything appeared to be working great.
At the first stop light back in town, my check gauges audio alarm and alarm light both came on. The oil pressure indicator was showing about 19 psi which was the lowest I've ever seen it. Normally it's between 35 and 55 psi after it's warmed up and depending upon throttle position. I accelerated from the light and the oil pressure climbed back to about 40 and the alarm light went out. Back in the driveway it dropped back to 20 psi but the alarms stayed off. Engine temperature was showing normal. I went out to start the car this morning and after the start-up test, the oil pressure gauge went to zero and stayed at zero. Definitely not good. Oil looks clean on the dipstick and the level is good. Is it safe to assume my oil pump just gave up? It sure looks like the next trip will be via a tow truck, which sucks.


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PostPosted: Mon Mar 18, 2013 4:32 pm 
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Location: Dearborn, MI
Year and Trim: '93 SSEi
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'97 LeSabre
First verify with a mechanical gauge.

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'97 Chevy Camaro - 3800, T5, T-tops, Getting ready for some major upgrades!
'05 Cadillac STS - V8, AWD, her DD
'92 Olds Trofeo - Fair weather DD
'84 GMC Sierra Classic - Twin turbo 3800
'97 Buick LeSabre - L67 project, future winter DD
'92 Pontiac Bonneville SSE future project

Doesn't run:
'87 Buick LeSabre T-type - future victim
'67 Buick LeSabre - future victim


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PostPosted: Mon Mar 18, 2013 4:53 pm 
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Location: Central Illinois
Year and Trim: 1992 SSE
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The oil pumps are pretty solid, really, and work pretty mush like a rotary engine. It would take A LOT of wear to not develop any pressure. While not impossible, it's more likely to be a bad oil pressure sender (hopefully) or bearing wear.

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PostPosted: Tue Mar 19, 2013 11:02 pm 
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Year and Trim: 95 SSEi
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The oil pressure sender is a $30 part on the back of the engine that you
can replace in 15 minutes. I would do that first and see if the gauge
shows pressure. If you have no oil pressure you would know it pretty
quickly in a bad way if you drive it. If the car has less that 200k miles
and was well taken care of, I doubt the pump is bad.

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PostPosted: Wed Mar 20, 2013 7:17 pm 
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Year and Trim: 1995 SSEi
143k miles and well taken care of. I haven't found the time to look at it yet. It's sitting in a fresh bank of snow as of this morning.


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PostPosted: Wed Apr 10, 2013 2:42 pm 
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Year and Trim: 1995 SSEi
Pulled the connector for the oil pressure sender and cleaned it with contact cleaner. Reinstalled and started the motor for about 30 sec. The oil pressure is still at zero but it also appears that the valve cover gasket is leaking oil onto the front exhaust manifold. Looks like I'm ordering a valve cover gasket too, along with the oil pressure sender.


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PostPosted: Wed Apr 10, 2013 5:21 pm 
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Location: Racine, Wisconsin
Year and Trim: 97.2 40th SLE
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94 SSEi
Is the engine making any unusual noises? If it seems to be running ok, its most likely the oil pressure sender.

But if you've got any noise coming out of that motor, I would suspect bearings.

On our 1994 SSEi, oil pressure started bottoming out at stops. Then start getting light noise, ending up spinning 2 bearings and sending metal through EVERY part of the motor. In the end it was complete junk, not even worth a rebuild.

Hopefully its just your sender, though.

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PostPosted: Mon Apr 22, 2013 6:09 pm 
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Year and Trim: 1995 SSEi
Some good news. I put a new oil pressure sender in today and the oil pressure gauge is showing 40 psi at idle.
The bad news is I still have oil burning off on the front exhaust manifold even after replacing the front valve pan cover gasket. If I leave it much more than a minute or two I have major smoke. I think it may be time for a hoist to see what's going one..... oil pressure is a good thing for sure. One problem at a time.


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PostPosted: Mon Apr 22, 2013 6:24 pm 
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Location: Racine, Wisconsin
Year and Trim: 97.2 40th SLE
68 w/400
94 SSEi
Mine smoked and stunk for a while. When the gaskets leak it takes a while to get all that nasty old oil burnt off. Maybe try either wiping it down real good with some engine degreaser or power washing it (I hear mixed opinions on this). That should help. Hopefully its not another problem with the engine.

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1997.2 40th SLE-138k
1968 Bonneville 400ci w/TH-400-40k
1999 GMC Suburban SLT-191k
2005 Escalade 253k-GINA


nos4blood70 wrote:
Literally, cars are drugs.


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PostPosted: Mon Apr 22, 2013 9:33 pm 
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Year and Trim: 1995 LX(went to the shredder)*sniffle*
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If the engine is cold, I wouldn't be afraid to hose off the manifold(oily spots) with some carb cleaner and allow it to then evaporate. Might not get all of it, but it should help some. A pressure washer might work, but I personally don't enjoy the chances of water getting into connectors and causing gremlins.

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PostPosted: Mon Apr 22, 2013 9:54 pm 
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Location: Dearborn, MI
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'97 LeSabre
If pressurized water causes a gremlin, it was there all along. And it's the best way to tell if you have a bad ignition coil!

:lol:



Glad to see it was just a the oil pressure sensor.

_________________
I don't know how much boost it takes to blow the tires off. But I know how much I'm going to use!
Image

Runs:
'93 Pontiac Bonneville SSEi - Twincharged, manual, racecar! Build thread
'97 Chevy Camaro - 3800, T5, T-tops, Getting ready for some major upgrades!
'05 Cadillac STS - V8, AWD, her DD
'92 Olds Trofeo - Fair weather DD
'84 GMC Sierra Classic - Twin turbo 3800
'97 Buick LeSabre - L67 project, future winter DD
'92 Pontiac Bonneville SSE future project

Doesn't run:
'87 Buick LeSabre T-type - future victim
'67 Buick LeSabre - future victim


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PostPosted: Mon Apr 22, 2013 11:00 pm 
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Year and Trim: 1995 LX(went to the shredder)*sniffle*
1999 SE
Don't make fun of the gremlins. My CKPS has one when it rains!

_________________
I have a Bonneville, it's white and N/A! :twisted:
Image
Mod List: Hood and Fender "adjustment" - "Enhanced" A/C compressor clutch - Extra loud PS Pump - Mega sensitive CKPS - Audible Rear Drums - Lowered headliner - Custom stained upholstery - "Brown Devil" weight reduction kit - Low Friction Belt. More to come!


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PostPosted: Tue May 14, 2013 6:32 pm 
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Year and Trim: 1995 SSEi
Managed to stop the oil leaking onto the exhaust manifold by replacing the front valve pan cover gasket. The bad news is that she's started knocking and the oil pressure won't stay up unless I keep the rpms up. Looks like the main bearings are done. The super charger is also making a death rattle so I know the end is here. 143,000 miles and she's done!

Thanks for the help!


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