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- From: jskean@unlinfo.unl.edu (jonathan skean)
- Newsgroups: rec.autos.tech
- Subject: Re: Exhaust Moisture
- Date: 21 Dec 1992 16:52:07 GMT
- Organization: University of Nebraska--Lincoln
- Lines: 28
- Distribution: all
- Message-ID: <1h4snnINN9lj@crcnis1.unl.edu>
- References: <Dec21.005807.26476@yuma.ACNS.ColoState.EDU>
- NNTP-Posting-Host: unlinfo.unl.edu
-
- spatton@lamar.ColoState.EDU (Samuel Patton) writes:
-
- >I have a 78 Trans Am with a pontiac 400 and Borg Warner T-10 four speed
- >installed.
-
- >Lately I have noticed that on the drivers side exhaust ( its dual exhaust )
- >alot of water vapor comes out of the tailpipe while noe is coming out of
- >the exhaust from the other head...
-
- Don't have a '78 Firebird handy, but other rear-drive GM barges had
- an exaust heat riser control on the right side manifold which allowed
- exaust gas to flow through passages in the intake manifold to help
- vaporize the fuel. After the riser heats up, the exaust is diverted
- to the exaust pipe. (By this time the intake manifold should be
- warm enough not to need the exaust any more.) The heat riser valve
- has a iron counterweight about 1/3 the size of a pack of cigarettes and
- a spiral spring. It's located between the exaust manifold and the
- exaust pipe. Your auto parts store should have some graphite-bearing
- penetrating oil made exactly for this application. After soaking the
- valve in penetrating oil (while cold!) overnight, use a bit of violence
- to jar the damn thing loose. Having once siezed, it will be a pain
- again regularly. Just consider it a normal maintenace item for
- an old V8.
- --
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