David, Now that's an interesting theory! I've never had a PCV valve fail before on any of my cars or truck. I understood that they are extremely low maintenance. But you'd know more than me about this stuff, so let me pick your brain. :-) Is it common for PCV valves to fail while a car is sitting? Or could it have been on the way to failure and the fact that it happened when and where it happened (after an 800-mile trip and a two-day rest) could have been a mere coincidence? Farrar Hudkins #2613 "Sparky" David Teitelbaum wrote: > > > I have another possible theory. Assume this happened on a carbureated > car. If the car did not have proper crankcase ventilation the > crankcase *could* have built up positive pressure which could include > oil vapors and gas fumes. They could travel through the bearings into > the top of the distributer where the sparks between the rotor and cap > could have ignited them. I have to consider the carbureator conversion > could be responsible. That or again, maybe a fuel leak dripping onto > the distributer ignited by an improperly inserted #2 spark plug wire > which was sparking inside the well of the distibuter cap. Just > intelligent guesses. An electrical fire IMHO would not have caused > this all by itself. There had to also be "fuel" added to it. It DOES > point out the weak link of not having a protected primary ignition > circuit but that is pretty common on a lot of cars. But that is not > what burned. > David Teitelbaum > vin 10757 ------------------------------------ To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/