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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!cos!cos!bob1
- From: bob1@cos.com (Bob Blackshaw)
- Subject: Re: The case of the exploding distributor cap. Need help.
- Message-ID: <bob1.725144530@cos>
- Organization: Corporation for Open Systems
- References: <724870837.AA00000@blkcat.UUCP> <BzM5Ar.M50.2@cs.cmu.edu>
- Distribution: na
- Date: Wed, 23 Dec 1992 21:02:10 GMT
- Lines: 42
-
- In <BzM5Ar.M50.2@cs.cmu.edu> murthy+@EDRC.CMU.EDU (Sesh Murthy) writes:
-
- >|> SM> The rotor exploded and took entire distributor cap with it.
- >|> SM> At the same time, it set the distributor cap on fire right under the
- >|> SM> coil. I put out the fire but could not see the extent of the damage.
- >|>
- >|> My hypothesis is that the explosion was caused by ignition of gas fumes from the
- >|> fuel tank vapor recovery system. If so, this would indicate that the fuel vapor
- >|> recovery system cannister and/or the PCV valve require service/replacement.
- >|> Possibly this was exacerbated by a worn distributor shaft.Unless you take care
- >|> of these, you can expect another explosion to occur with the new (used)
- >|> distributor.
- >The distributor shaft looks just fine to me. How am I supposed to find out
- >if it is worn. I asked a GM mechanic and he said he could not find any problem.
-
- >There are no gasoline fumes in the egine compartment.
- >I doubt that the fuel recovery system is leaking. I am quite sensitive
- >to the smell of gasoline.
-
- >The PCV valve has been replaced earlier. I do not see a connection with the explosion.
-
- >I think the rotor broke apart due to centrifugal force. It was probably defective.
- >I think that before it broke up, it was warped and the friction set the cap on fire.
- >But this diagnosis has too many holes.
-
- >|>
- >|> Without going into detail, I don't think you have any reason for action against
- >|> the mechanic in this case.
- >That may be. Why do you say this?
-
- >Thanks for your reply.
- >Sesh
-
- Makes me think of a friend who owned a Studebaker (yeah, it was back in
- the late 50s). Sometimes when he started the car, the distributor cap
- would blow off. He eventually discovered that the vacuum advance dia-
- phragm was perforated and occasionally gas fumes would work into the
- distributor. First spark on startup and BANG. We all thought it was
- a fun car.
-
- Bob.
-
-