GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.

Home » Public Forums » GMCnet » Re: [GMCnet] Transmission vacuum modulator leaking?
Question [message #327335 is a reply to message #327048] Wed, 20 December 2017 09:36 Go to previous messageGo to previous message
gibsongo is currently offline  gibsongo   Canada
Messages: 116
Registered: October 2012
Location: Montreal West, Quebec, Ca...
Karma:
Senior Member
Hello all,

Once again, thanks for the comments and suggestions. A couple of more questions if I may. I still haven't managed to locate a garage willing to work on my "white smoke problem". Several have indicated that they would be willing to take a look in January when their bread and butter business slows down a little.
Question 1: how long I have before facing serious rust resulting from what is probably a little anti freeze leaking into one or several combustion chambers. Are we talking months here....or weeks....or days? If it's days, I may already be too late.
Question 2: Should I be starting the engine regularly to keep things oiled, or does that worsen the problem since I may be drawing more antifreeze into the combustion chamber(s)?
Question 3: bdub suggested putting in some Bars Leaks and making a run to Bluevale. I'll admit this is a tempting option, but what are the chances of a can of this stuff actually temporarily stopping/slowing the lead enough to drive 500 + miles? And don't I run the risk of permanently gumming up the radiator, heater core and coolant passages in the engine block? i.e. Would this cure possibly be worse than the illness?

Frank from Borrmann's garage has suggested getting a radiator pressure tester kit, pressurizing the system, looking for a pressure drop then pulling spark plugs to see which cylinders are affected. It's supposed to warm up to just a few degrees below freezing on the weekend, so this is how I may be spending the day before Christmas....


Gordon Gibson 1976 23" Norris Upfit Montreal West, Quebec, Canada
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: [GMCnet] Way off topic: Largest rocket to ever be launched.
Next Topic: [GMCnet] Removing the radiator in a 78 GMC.
Goto Forum:
  


Current Time: Sun May 12 14:03:11 CDT 2024

Total time taken to generate the page: 0.00703 seconds