Question about 1991 Pontiac Sunbird

1 Answer

91 Sunbird oil leak and gauge problems

I just bought this car for basic transportation. It's got 125k, manual tranny, and prior owner did all of his own maintenance. Got myself the Haynes repair manual and plan on trying to maintain the car myself and learn as I go (I'm what you would call a n00b as it goes for auto repair). The guy I bought it from said at one point oil was leaking from the pan. Oil pan gasket was replaced and the guy told me it was fixed. I notice that now after I drive the car that it will slowly leak small amounts of oil and it looks as though it's coming from the pan but I can't be sure.

The other thing that's off with this bird is that nearly every gauge is messed up...the speedo is off by 10-20 mph depending on how hard the motor is working, the oil pressure, temp, fuel, and battery gauges all seem to jump up and down (especially when shifting from gears 1-3). RPM is the only gauge that remotely works the way it should. Any idea what might be causing this? The guy I bought it from said it's been like that for over a year. He pulled apart the dash and said he couldn't figure out what the deal was.

More to come...don't want to bite off more then I can chew right away (that is if I haven't already....we'll see...). Any feedback is apprecaited. Thanks, Ryan

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Pontiac Master
  • 2,715 Answers

PAN GASKET.. "fused"...

That IS interesting ... I guess you should count yourself
lucky IF the previous owner was NOT into EPOXY...
(your challenge will be cleaning or REPLACING those anomalies... back into a useable/serviceable state)

I'm a pure AMATEUR mechanic ... As far as N00-b

Asking questions is a GREAT START...

Haynes is okay... but if you plan on keeping this
I highly recommend you attempt to find FACTORY
workshop... or "professional" grade MANUALS...


Even sets... Like MOTORS Repair Manuals
will give excellent detail...

For you... the really GREAT news is: "Grand Am' GAUGES share in the same VINTAGE ("91 & '92)...

FREE TSBs (& wiring diagrams) ,
TECHNICAL SERVICE BULLETINS...
That I found in a brief look... number up to 28 on your
INSTRUMENT CLUSTER ALONE...

(twenty eight...
( "Fluctuations" are specifically mentioned))...
You won't "SEE" anything because there are mass-storage device software updates involved...

Contact references are given inside for DEALER TECHNICIANS to contact Harco Industries, attention Bob Early... and gives both a 513 prefix number
(Englewood, OH) and a toll-free 800-523-0203..

Estimated Update time was 0.2 hours in 1992

Free TSBs & drawings at BBB Industries (below)
Registration is required (BECAUSE these are
Real PROPRIEARY documents.

I hope this information at least encourages your interest..

On-Board-Diagnostic (standards)
Keep in mind that STANDARDIZED OBD... had not yet been achieved in 1992... Which will pretty much assures there are COMMUNITIES of INTEREST out there
that have ALREADY (I would think) come together... to share information.

If not... you have that OPTION...!

(I've always admired those Sunbirds)....

As far as N00B... Just be aware you should use tubing wrenches... on tubes, anti-seize compounds on dissimilar metal fasteners... Liquid Wrench on all dirty and old bolts.. Six point sockets ruin less bolts...

(fusing things is not a GREAT IDEA... Especially when you are the mechanic who you will be following... My
'66 Austin (big) Healey came out to California from Illinois in 1970... but not before SOMEBODY used pliers on a couple of obvious spots... Since then it has been pampered pretty well (including DOT 5 Castrol Brake Fluid).

Summary... use the right tool for the job...
(pliers & vise-grips are generally ALWAYS NOT the ""RIGHT-TOOLS")...

The very first things you want to check are the coolant and brakes... IMMEDIATE FLUID Change-out..

The only exotic tool you need to flush the brakes is a couple of cans of FRESH FLUID... and a friends foot to press & release on command.
..

Good luck with your new treasures
(I still have 4 out of production cars...
(three roadsters))... endless hours of entertainment!!)

Use AMAZON & eBay when looking for those SPECIAL parts... and get yourself some EXTRA gauge clusters... (soon

BBB Industries Premium Alternators Starters Power Steering Products

Posted on Mar 03, 2017

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
toyo Man
  • 6 Answers

SOURCE: 1969 pontiac firebird oil pan.

you can take the oil pan off by just undoing the bolts just lift the car up then since it is just pin holes you can probly just spot weld them or maybe use a high streangth solder

Posted on Jun 25, 2008

  • 83 Answers

SOURCE: Temperature gauge shows hot

head gasket does the overflow bootle have bubbles in it when idleing warm if does most likey rear head gasket.

Posted on Jan 06, 2009

  • 1 Answer

SOURCE: temp gauge and gas gauge not working

I had the same problem with my 2001 Pontiac Montana and the intake manifold gasket. This is a major problem with these 3.4L engines, if you are in the states I'm pretty sure there is a class action law suite against GM for this. I had my manifold gasket replaced and it was about $1000 CAD. You need to get your vehicle looked at right away as this could cause major engine damage, coolant will leak into the engine and soon enough you will be replacing that too. Good Luck

Posted on Feb 01, 2009

  • 1118 Answers

SOURCE: gearbox oil leaking

Dip stick tube has a rubber boot it slips thru, that seals it to trans. If its got a kick down cable there is a rubber o ring on that too, or front pump seal on trans is leaking.

Posted on Feb 14, 2009

Molson02536
  • 3854 Answers

SOURCE: I have a code p1189 come up on a computer when the

P1189 Engine Oil Pressure Switch Circuit

The problem is the car does not have the Catalytic converter. You should have a check engine light for the lack of Catalytic converter since there should be a O2 sensor back there monitoring the exhaust system. The leak of Catalytic converter will also drop your back pressure which the new engines need to run 100%. Without the proper back pressure, it throws off the MAP sensor readings and is causing a conflict in your engine's management parameters. You can get an aftermarket Cat for under $80.00. Good luck and keep me posted.

Posted on Jan 12, 2010

Testimonial: "Very helpful. Thanks so much. I will let you know when I put one on if it helped it. Scary many mechanics say it wont make a difference. Thanks!"

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Wont shift into 5th gear


Linkage loose or broken motor mount.


You need to say auto or manual tranny I assumed manual
All other vectors point to a failing tranny.

Sep 28, 2015 | Cars & Trucks

1 Answer

Just had my 120000 service done on a XC90 which I just purchased. It was running just fine and then started to consume oil like crazy. Took it back to mechanic and he said the turbo is going out. No...


There is the possibility,the turbo was going out and the previous owner had thicker oil with oil treatment additive in the engine,hiding the turbo seal problem.Did your service include an oil and filter change? Your new regular (proper viscosity) oil may now be showing the leaky turbo seal.Did you have a oil change done at your service?Once you have the seal/turbo rebuilt,may sure to always idle the engine a minute before shut off after fast driving.This will increase the life of the turbo seals.

Jun 15, 2017 | 2005 Volvo XC90

1 Answer

How to repace oilpump in 91 sunbird


you will need to drop the oil pan to get to it.
best bet is to get a haynes total care book

Sep 10, 2011 | 1991 Pontiac Sunbird

1 Answer

Leaking oil very badly at what looks like a sensor located near oil filter mount on my 1993 Pontiac Sunbird LE 2.0 liter. Any help is greatly appreciated!


this sounds like the oil pressure switch(ops) is leaking.pickup a ops and replace the sensor and the leak will stop

Sep 04, 2011 | 1993 Pontiac Sunbird

1 Answer

Bought 3 mos ago 1997 Outback Limited Ed, 125k. Auto tranny has developed bad leak, can't find source. Also some fluid seems to be going into Differential as I can take out a QT. Drive a bit and it is...


mcdevito75, The tranny has a front pump to pump fluid back and forth to the torque converter, a seal must be leaking fluid into the diff. also the diff, has tranny fluid in front wheel drive cars so tranny fluid in the diff. is normal, Tranny will have to come out to check that front pump, or fron tranny seal.

Jun 08, 2010 | 1997 Subaru Outback

1 Answer

91 sunbird le 2.0 sparkplug gap under hood


I would go with the one under the hood because the owners manual is generic for all models for that year while the one under the hood is for your model.

Mar 02, 2010 | Pontiac Sunbird Cars & Trucks

1 Answer

Can i drain the transmission fluid on a 05 suzuki forenza my self?


yes. HOWEVER, whe you refill it. make sure that you put in the correct type of oil. refer to your owner manual prior to putting in any old automatice trranny fluid as some tranny's require a sopecial type of oil, put in the wrong one and you fry your transmission. If its a standard, put in the correct weight of gear oil. Not trying to scare you, but i want to make sure that your REFER TO YOUR OWNERS MANUAL for the correct type of oil to put in after you drain it.

good luck.

Sep 27, 2009 | 2005 Suzuki Forenza

1 Answer

Transmission slipping......


If its the main seal gone,you will have to remove the tranny regardless because the main seal is the torq converter seal.Even though it leaks,if its slipping when full of oil chances are your tranny is no good,if it shifts fine its not to late,just keep it full of oil and have the leak fixed.Look under the front of the car when its in park,with the e.brake on and running,look for the leak.If the leak is between the the motor and the tranny its probably the main seal.Check the transmission pan,axle seals and coolant lines for leaks also.Changing the transmission is no small job and should be done by a garage if your not sure how to do it.Hope this helps.

Mar 04, 2009 | 1999 Plymouth Neon

1 Answer

Oil pressure switch


Pressure switch is usually located near the oil filter and generally has two wires on it. Best way to check it is by putting a manual oil pressure gauge in it's place and reading actual oil pressure. If your symptoms are no oil pressure reading or abnormal readings, with no tapping noises (or worse) from engine then it likely is the switch. Most require a special socket to remove but the sending units are not terribly expensive.

Nov 29, 2008 | 1992 Pontiac Sunbird

1 Answer

Transmission problems


the best thing i can tell you and the cheapest is to try to change the screen and filter new fluid if this tranny was driven and never had a tranny change chances are from what your saying the damage is done the only chance you have is to try what i explained and hope the screen is just cached with debris and sludge good luck

Aug 23, 2008 | 1990 Honda Civic

Not finding what you are looking for?
1991 Pontiac Sunbird Logo

Related Topics:

65 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

76682 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8531 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...