Best Answer

Toc much preasure or even heat and preasure. It could be the gasket/ seal surrounding the oil filter aswell. You should change the oil filter, gasket/ seal and it should not leak.

Are you 100% sure the filter is leaking or possibly oil is running off the filter but is possibly coming from above, as in a leaking valve cover gasket. If the filter is indeed leaking it can only be a few things. Either the filter was installed incorrectly or the mounting surface was dirty or the old filter gasket was left on. Remove the filter, make sure the old gasket was removed, clean the mounting surface throughly, and take a close look at the surface. Make sure there are no scratches or pitting there. Now apply a light coat of oil to the new filter gasket. Install the filter and tighten it exactly 3/4 turn after it makes contact with the mounting surface. (NO MORE AND NO LESS!!!) I stress, 3/4 turn. This is where most people make a mistake and tighten the filter way too much. It may not feel tight enough, but I assure you that it is. After the filter gets hot, the gasket will swell and it will be plenty tight and create a good seal but be easy to remove the next time.

User Avatar

Wiki User

โˆ™ 2008-12-01 03:39:30
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What would cause a 1987 Chevy 305 to leak oil out of the oil filter?
Write your answer...
Related questions

Fuel injector filter on a 1987 Chevy Celebrity?

The fuel filter on a 1987 Chevy Celebrity is next to the fuel tank on the driver's side of the car/

What oil filter for 1987 Chevy truck?

stp s5 oil filter

How do you replace a fuel filter in 1987 4x4 Chevy Pickup?

Chevy S10 fuel filterI am looking for the fuel filter on a 1987 Chevy s10 blazer 4x4. I looked at the driver side frame rail and cannot find it. Can anyone help.

Where is the fuel filter on a 1987 Chevy Celebrity?

The filter is on the drivers side under the car near the fuel tank.

How many MPG would your 1987 Chevy silverado get with a new gas filter Air filter and oil change?

Fuel filter and clean oil may be a good idea, but your 8 to 10 mpg will not change.

What will a clogged fuel filter cause on a 1987 chevy 305?

It starts by missing and running rough when pulling a load, and worsens until the engine won't run at all.

What is the oil capacity for a 1987 Chevy truck 2500?

5 qts. with a new filter.

Why is your 1987 Chevy Celebrity hard starting and sluggish on takeoff?

I would suspect low fuel pressure would cause both conditions.

Where is the oil filter on a 1987 Chevy S10 truck?

The oil filter on a 1987 Chevy S10 truck is located on the bottom, right side of the engine. It is positioned on its side to allow for easy removal and replacement. If the S10 truck is a 4+4 with the 4.3 engine, the engine oil filter would be accessed from the top, under the hood in the drivers side front corner of the engine compartment.

Where is the fuel filter located on a 1987 Chevy s-10?

By the rear wheel, in the well.

Where is the fuel filter in a 1987 s10 Chevy blazer?

It is tucked in close to the power steering pump, not easy to get to.

Would your check engine light come on if your fuel filter is bad in a 1987 Chevy s-10 pickup?

Yes, this is possible. It could be many things.

What would cause a 1987 Chevy S10 Tahoe Blazer to serge run fine for a while then serge again- It's not the fuel filter-After 4 months of working on it I suspect it might be a vacuum problem HELP?

It most likely the fuell pump

Where is the fuel filter located on a 1987 Chevy Camaro?

Under right rear of the vehicle, In front of the rear axle...

Where is the fuel filter located on a 1987 Chevy El Camino?

check the frame rail under drivers floor.

Would a 1987 Chevy Monte Carlo door fit a 1983 Chevy Monte Carlo?


What would cause a 1987 Chevy s 10 to die while in idle but not die when excelerating?

carb problems, adjust the idle screw and see if that helps

Where is fuel filter on a 1987 Honda Accord?

where is fuel filter on a 1987 Honda accord

Where is the fuel filter for a 1987 Plymouth horizon?

where is the fuel filter on a 1987 plymouyh horizon?

Where is the fuel filter located on a 1987 Chevy truck?

The fuel filter is probally underneath bolted to the frame, the fuel line comes out of the gas tank and is secured to the inner part of the frame and the fuel filter should be bolted to the frame about the center of the truck.

How do you remove a complete engine from a 1987 Chevy G20 Van?

Carefully. Why would you bother?


Are the door interchangeable on an 1987 chevy truck and an chevy blazer 1988

Oil capacity of 1984 7.4 l Chevy motorhome?

My 1987, book says "engine code" W, from the vin, 6 quarts no filter, and with filter 7 quarts. God Bless, Hope this helps.

1987 Chevy head bolt torque 2.5L?

1987 Chevy head bolt torque 2.5L?

Does a fuel filter on 1987 Dodge Dakota cause the truck to start and then stop?

The fuel filter could cause a start and stall. Other causes could include the fuel pump, computer, various sensors, and ignition system.