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dipstick tube pressure????

Old 11-23-03, 11:05 AM
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dipstick tube pressure????

Does anyone know what would cause the oil dipstick to be pushed out of the tube almost all the way. My engine actually squirted oil all over under the hood out of tha dipstick tube....any advice anyone??
John
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Old 11-23-03, 04:14 PM
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Well I hate to be the bearer of bad news but in most cases the pressure in the oil pan has been the result of missing side seals. When the motor turns and makes compression that pressure it trying real hard to get out. If you have a broken side seal it pushes right by the oil seals and into the pan. The normal breather is not lage enough to bleed off the preasure and the next weakest relief is the dipstick. Sorry
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Old 11-23-03, 05:44 PM
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Hey no problem, the motor is under warranty. Thanks for the info. Woud I be correct in guessing this would cause a stuttering idle and stuttering up to 4500 rpm until the revs are fast enough to at least sound smooth and a slight miss at idle?
John

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Old 11-24-03, 01:24 AM
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Yeah, I took apart a 12A that was shooting the dipstick to the ceiling in my garage when it was revved up. It had been overheated and a few side seals were pretty much welded into the rotor in the down position.
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Old 11-24-03, 09:28 AM
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Ok thanks.
John
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Old 11-24-03, 01:23 PM
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Originally posted by EProdRx7
Well I hate to be the bearer of bad news but in most cases the pressure in the oil pan has been the result of missing side seals. When the motor turns and makes compression that pressure it trying real hard to get out. If you have a broken side seal it pushes right by the oil seals and into the pan. The normal breather is not lage enough to bleed off the preasure and the next weakest relief is the dipstick. Sorry
Or it could just be what I had on my race car, and that is the fact that the breather was capped off (or maybe in your case clogged).
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Old 12-05-03, 09:22 AM
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Originally posted by EProdRx7
Well I hate to be the bearer of bad news but in most cases the pressure in the oil pan has been the result of missing side seals. When the motor turns and makes compression that pressure it trying real hard to get out. If you have a broken side seal it pushes right by the oil seals and into the pan. The normal breather is not lage enough to bleed off the preasure and the next weakest relief is the dipstick. Sorry
Thanks for the info- you were correct. What would cause this?
Thanks,
John
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Old 12-05-03, 10:13 PM
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Well the last time this happened to me it was because of some over agressive porting. ran great till the side seals on the rear rotor got hung up in the port and snapped. Result was compression straight into the crankcase and in this case it pushed all the oil out into the catch tank. On a stock motor this could be caused by carbon build up or carbon lock. If the motor had been dramatically over heated the side housings could be warped. If this were the case you would have regular over heating problems.
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Old 12-10-03, 10:33 PM
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Your having blow by caused by a pinched corner seal or collapsed side seal. Either case, you'll need to tear down your engine. Sorry to give you such bad news.
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Old 12-10-03, 10:34 PM
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Originally posted by Jodeny
Thanks for the info- you were correct. What would cause this?
Thanks,
John
Detonation can cause it.
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Old 12-11-03, 08:08 AM
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Originally posted by ErnieT
Your having blow by caused by a pinched corner seal or collapsed side seal. Either case, you'll need to tear down your engine. Sorry to give you such bad news.
ahh its not such bad news.... these cars aren't too bad to work on after 8 years...

Thanks for the info.

John
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Old 12-15-03, 08:51 AM
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John,
Check the PCV system - check valve, vacuum lines etc.
If there is no way to vent crankcase pressure the fist item to pop is usually the dipstick, Every engine pressurizes the crankcase so check the simple first before starting a complete engine teardown.
FWIW
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Old 01-11-04, 08:47 PM
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Update,
it was the black outer oil control ring seal. It got progressively worse from 0 miles to 900.
John
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