For the 1986 MR2 24 hours of lemons car we prepped, I did a lot of research on weak points of the 4AGE engine in the car. I decided that one of the biggest problems was oiling, both slosh in the oil pan as well as pooling in the head. Oil temperature is also always an issue. I decided to whip up a custom deep oil pan with internal swinging baffles.
I added an additional 1″ to the pan, and added four or five baffles with swinging doors to keep oil around the pickup. I also dropped the pickup around 1.25″ to compensate. Finally I added two additional side drains to the pan which were plumbed to hoses dumping out of the side of the valve cover. Sadly I didn’t take any photos of the swinging doors around the pickup. If I ever pull it off again I’ll snap some pics of it.
Our car lasted the whole race without oiling issues, so I guess it worked!
EDIT: We sold this pan since we are ditching 4AGE. Added some more photos of the inside.
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- 1″ of additional depth added to the pan. This added around a quart of extra oil capacity.
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- Flapper door
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- Flapper door
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- Flapper door to keep oil from migrating to the end of the pan.
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- Extended oil pickup
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- Extended oil pickup
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- Additional side drains on the oil pan
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- Closeup of side drains. Mcmaster barbed hose fittings were cut in half and welded on.
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- flapper doors on 4age custom oil pan
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- Another shot of flapper doors on 4age pan.
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- External oil drain connections
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- Interior shot of the 4AGE oil pan