1991 Geo Prizm Oil Filter

Tiny
ANTHONYS
  • MEMBER
  • 1991 GEO PRIZM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 78,000 MILES
I have a 1991 Geo Prizim and would like to replace the oil filter and can't find it while looking under the hood.

Any suggestions or tricks on locating it or changing it?

I have blue smoke at start up (very little) It goes away fast but does not burn oil at all. Could this be the spark plug seals I have read about? I don't think it's valve stem seals.
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Friday, September 26th, 2008 AT 10:06 AM

3 Replies

Tiny
MMPRINCE4000
  • EXPERT
You can jack up the car, put on stands, remove the stone/water shield on the passengers side. The filter is under and to the left of the exhaust manifold. The best access is from under the car. It screws into the block horizontally. If you use a Toyota filter, they come with celophane covering the seal, be sure to remove it first before installation.

The smoke on start up is the valve seals, not uncommon in a car this old.
You would have to remove the camshafts (intake and exhaust) to replace, and there is a special tool set you would need, since the valve springs are recessed in the head. You would also need shop air to hold the valve in place while removing the spring/locks.
The spark plug tube seals prevent oil from getting into the spark plug hole, but oil could only get into the engine if the spark plug was loose.
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Saturday, September 27th, 2008 AT 6:58 AM
Tiny
ANTHONYS
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I did manage to get the filter off and appreciate the tip.

I'd like to tune up the engine now but I'm not sure about ignition timing. I do remember on old car's, vacum advance hoses were plugged during the procedure. There is no advance on my car, should I just time it with a light?

1991 Geo Prizim
4 cyl 1.6
fuel injection
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Wednesday, October 8th, 2008 AT 1:33 PM
Tiny
MMPRINCE4000
  • EXPERT
You short Te1 and E1 on the diagnostic link on the drivers side shock tower. This will remove the computer advance, you can then set mechanical advance (10 degrees BTDC).
You will know that you are in diagnostic mode because the check engine light will flash every second while engine is running.
Turning the ign. To the "on" position with terminals shorted will display any error codes.
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Thursday, October 9th, 2008 AT 4:45 AM

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