Big mystery....where did the oil go? 93SSE - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-25-2005, 11:45 AM   #1
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default Big mystery....where did the oil go? 93SSE

Talking about Jseabert'* 93SSE here:

L27, ran very low on oil without his knowledge in a short period of time. No stains on the driveway or in the work parking lot (other than normal mild stains). Ran very low to less than an inch in the pan. Spun some rod bearings (damage to the crank at #4). Most of the crank looks good to mildly scored, cam and lifters look great. Oil pump pickup strainer was not clogged. Cylinder walls are not scored. (inspected all 6).

No evidence of oil leaking from the heads or LIM. New torque converter has no oil on it which COULD possibly rule out a rear main seal leak, at least in that direction.

My thoughts is for the pan to be that empty, it has to be a pressure leak somwhere, not static, but I'll be damned if I can find evidence anywhere on his motor.

Anyone have any theories or guesses?
willwren is offline   Reply With Quote
Old 05-25-2005, 12:05 PM   #2
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Ames, Iowa
Posts: 3,066
Thanks: 0
Thanked 1 Time in 1 Post
bill buttermore is on a distinguished road
Default

I agree; I think it would have to be a stream at pressure that leaves little or no drip. The most likely exterior spot for this is around the oil filter. Maybe the oil sender leaks when hot and under pressure spraying a stream to the ground when moving under higher rpm only. This would not occur at idle or when starting up. We had a similar thread a while ago where the a lot of oil was lost quickly with no easy trail. The apparent cause was the oil filter.

EDIT: But if this were the case you would expect to see at least some evidence around the sender or the filter. Are these bone dry?
bill buttermore is offline   Reply With Quote
Old 05-25-2005, 12:16 PM   #3
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Not bone dry, some oil residue on both, but not a heavy coating on the sender threads that I could see. On the BODY of the sender, yes, but stuff blows. I'd buy a possible leak at the filter. May have to go over and take another look. It'* still installed on the car.
willwren is offline   Reply With Quote
Old 05-25-2005, 01:47 PM   #4
Senior Member
Certified Car Nut
 
Join Date: Jun 2003
Posts: 15,928
Thanks: 0
Thanked 0 Times in 0 Posts
BonneMeMN is on a distinguished road
Default

Has the engine been compression tested before you disassebled it? Is this the reman engine or the really old one that blew?
BonneMeMN is offline   Reply With Quote
Old 05-25-2005, 01:51 PM   #5
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

180k. I know where you're going, and he has no smoke or smell in the exhaust. New trans, old motor.
willwren is offline   Reply With Quote
Old 05-25-2005, 01:58 PM   #6
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Bill I saw something very similar in a buddy'* engine.

Here'* the scenario. Engine runs out of oil and smokes bearings. No leaks no indications of where it went. Had recent work done on the motor. Pull dipstick right after turning off and no oil. Wait 5 minutes...you got oil.

I believe when they worked on it some oil return hole got plugged, the oil sat there and cooked the motor since no oil was in the pan.

But if he'* just got disappearing oil period. It'* either in exhaust pipe (would show on plugs), in the tranny...on the ground, or in the coolant. Don't forget... oil pressure is higher than coolant pressure in some areas where the jackets are close to each other.
BillBoost37 is offline   Reply With Quote
Old 05-25-2005, 02:11 PM   #7
Senior Member
Posts like a Turbo
 
Join Date: Apr 2004
Location: Sheridan Wyoming
Posts: 210
Thanks: 0
Thanked 0 Times in 0 Posts
57chevythunder is on a distinguished road
Default

Say Wil, -I assume this motor is going to be totoally disassembled?

If so, I am really curious about the oil control rings. I had an engine one time that I unknowingly had "stuck" the oil rings, due to excessively high combustion chamber temperatures, which caused the upper half of the pistons (just down past the oil rings) to run too hot. -What happened was I was messing around with air/fuel ratios, and had run the car in an over-lean condition at highway speeds for probably a day. From that moment on, the sucker used oil at the rate of one quart every 200 miles.

Now here is the interesting part of that story: That engine performed perfectly, compression tested perfect, no leaks, no smoke, no smell. It was burning the oil so cleanly that it was not visible. And I think part of the reason for no smoke, was this: the only time that the "oil control" was totally lost, was with the engine running at highway speeds. Under town-driving conditions, lower speeds, lower temps, etc, the cylinder walls were not being "oil flooded." -but were under highway conditions.

-and by the way, the rest of that engine was in perfect condition. -no damage, wear, etc. -just oil rings stuck in their grooves, which made it impossible for them to scrape the oil off the cylinders.

I am WAY CURIOUS to know what you find on this one
57chevythunder is offline   Reply With Quote
Old 05-25-2005, 07:48 PM   #8
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

I'm curious to this as well... as well as the position of the Piston rings... Its amazing where you find the gap sometimes...

I have never seen a set of oil control rings freeze up on any 3800... I have seen the rings on plenty of 3.0 Mitsubishi V6'* do this... Have even seen the top compression rin on a Ford 302 upside down from the factory...

On of the problems some of the 93-94'* had was with valve stem seals... Some of these would burn oil like mad... And the fix was to repair the valve stem seals... The piston rings in a 3800 are pretty good, and most 3800'* will burn almost nothing for oil during their service life...

I am supprised at the car being down to 1 inch in the pan... I'd say that the equivelent of 1-1.5 quarts in the pan.... Leaving the engine starving for oil... Did he keep an eye on the oil or just drive it?

Let us know what you or he finds Bill..

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 05-25-2005, 09:18 PM   #9
Senior Member
Posts like a Camaro
 
Join Date: Dec 2002
Location: Northeast MS
Posts: 1,079
Thanks: 0
Thanked 1 Time in 1 Post
94SSEgold is on a distinguished road
Default

Quote:
Originally Posted by willwren
180k. I know where you're going, and he has no smoke or smell in the exhaust. New trans, old motor.
mine went on the 94 at around 180k and i replaced it and traded it at 190k for the grand prix. My oil pressure just dropped from 80 to 0 within 5 seconds and seized but there were no leaks at all also. to this day we cant figure out where the oil went to.
94SSEgold is offline   Reply With Quote
Old 05-25-2005, 09:47 PM   #10
Senior Member
True Car Nut
 
Join Date: Jun 2003
Location: Purgatory
Posts: 6,313
Thanks: 0
Thanked 0 Times in 0 Posts
PontiacDad is on a distinguished road
Default

I say its oil filter related, somehow?
There would have been signs otherwise, like high oil presure, smells, smoke, etc?
PontiacDad is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Mystery oil leak? Dealer can't figure it out. Ivory03 2000-2005 3 08-20-2005 07:50 PM
Mystery Oil leak ! - Clue!! 2000SilverBullet 2000-2005 30 06-25-2005 11:37 PM
Big Move...BIg Renovations...Big Time! Jim W Lounge 32 06-16-2005 12:02 AM
Big guy....Big Car....Big Possibilities Way_2Fast_Way_2Furious Introductions for new members 10 05-25-2005 01:06 PM
shifts hard, no supercharge 93sse amenson 1992-1999 2 05-12-2004 01:33 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 12:40 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.