Question about 1994 Pontiac Bonneville

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How to locate the engine oil leak does the car need to be running

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Usually you won't see a leak until the car is parked. It's a good idea to put a piece of cardboard under the car after it's been driven to detect the leak or leaks. If you see any drops or puddle on the cardboard, crawl underneath the car and lookup under the engine to see where the leak is coming from. Look at the area above the puddle or dripping.

Posted on Nov 22, 2013

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Where is my leak coming from?


Juan, Oil could be leaking from a lot of different location, places to start looking are oil pressure switch, valve cover gasket, timing cover/crank seal, oil pan gasket, etc. Engine may have to be washed down to locate leak. Have a good tech. scan vehicle for trouble codes, diagnose why car dose not run and estimate repair. Check the attached links,instruction and guides, Good luck
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Michael
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1 Answer

Possible source of oil leak. Does not leak when not running. Checked drain plug and filter already. Any other source of leak? Not sure where located.


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1 Answer

I know that there is an oil leak but i cannot tell exactly where.


Oil leaks can be a pain to locate so I will give you a few tricks I've picked up along the way for locating oil leaks. Start by cleaning/degreasing the area. You want to remove as much of the old residue as possible. Then you can do several things from here.

1. Purchase and oil dye additive (this additive makes the oil glow when a black light i shined on it) and run the engine for a little while then re-inspect with black light to find locations where dye is concentrated.

2. After cleaning, spray the are that you suspect the leak is coming from with a spray on type foot powder(powdre sprays on white providing an excellent contrast to trace leak). Run the engine and follow the oil trail to source of leak.

Feb 23, 2011 | Dodge Stratus Cars & Trucks

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1996 cavalier bad oil leak when running


Overfilled is not good but it would have to be very high to cause leak,There are numerous places in rear of engine that could be leaking.could be leaking from rear of intake,the oilpump drive o ring,but most likly leaking from rear main seal that seals at the rear of the crankshaft and the transmission will need to come out to access this seal. you will need to have the oil leak diagnosed to locate the exact spot.

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1 Answer

My 2001 chevy cavalier has a oil leak and I can't


You can buy a florescent dye to add to the oil and a light to make the dye really shine.
Clean the engine with "brake clean" from a spray can at the oil leak areas ....then run the engine.
Check for the start location of the leak.
Start with a short run time ....... then longer run time if necessary until the leak(s) show.
With or with out the dye ......this brake cleaning method should help locate the leak(s).

Oil leak locations could be...in order of the most common on your car are........valve cover gasket,oil filter,oil pressure sending unit,drain plug,oil pan gasket,crank pickup sensor,rear seal.

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1 Answer

Oil leaking on front right side of the car near oil pan and oil filter


You need to clean the engine and then run the vehicle while watching the area. The most common failure is the oil sending unit located near the oil filter. I have also seen a leak develop between the oil pump housing, which is mounted directly behind the hamonic balencer and the engine block.

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