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Exhaust presure in oil chamber

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Old May 9, 2003 | 03:53 PM
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Question Exhaust presure in oil chamber

After a engine rebuild, when getting turbo boost i get a exhaust presure in the oil pan. And the oil check pin hops out and oil flushes out og the hole.

When opening the oil filler cap and reving the engine so that i get boost presure, exhaust comes out of the oil filler hole.

Ive looked over the vacume hoses and cant find a problem. What i want to now is wich hoses/cables might have exhaust pressure. And maybe some one have pictures of rebuilding there engine. So that i can look at all hoses and so on.

The car goes terebily, when accelerating and getting boost there comes blue smoke out of the exhaust pipe.

The car is a 92 FD RX7 Japan spec.

Folowing mods
Greedy air intake.
Greedy front mount intercooler
Greedy Dump valve.

I hope someone can help.

Here's a vacume chart. Any sugestions?

http://www.apneablue.com/rx7/photos/...colorhoses.jpg

JT Pedersen
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Old May 12, 2003 | 01:31 PM
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exhaust pressure? the only thing i know of is getting compression to the oil by bad side seals. you should also have fuel in your gas. not sure how you would pressurize the oil with exhaust.
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Old May 13, 2003 | 05:44 AM
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Ok alittel uppdate. It's boost presure. Every time the turbos kick in, i get presure in the oil.

Maybe this clarifyes it.

JT Pedersen
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Old May 13, 2003 | 02:50 PM
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bad side seals. the compression is pushing past the side seals and pressurizing the oil chamber. rebuild is the only fix.
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Old May 14, 2003 | 10:34 AM
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hmm, the engine is just rebuilt, vell not replaced apex and side seals, but they where in perfect order.

How sure are u?
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Old May 14, 2003 | 10:37 AM
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Oh and another thing. the problem only occures when i get turbo boost. like above 3000 rpm.
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Old May 14, 2003 | 12:19 PM
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well i'm not dead positive but that is the only place i see the possibility of pressurizing the oil. by all means get other opinions and not just go on mine.
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Old May 14, 2003 | 01:11 PM
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Thanks for your imput. Im realy afraid of an answer like that again. The strain of stripping the motor again is not good.

Im hoping for it to be the turbo's but time will tell.

JT
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Old May 20, 2003 | 12:58 PM
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Could also be a bad corner seal, happened to my best friends car, cracked corner seals
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