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Re: [GMCnet] Transmission vacuum modulator leaking? [message #327034 is a reply to message #327032]

Mon, 11 December 2017 23:02

GMC.LES

Messages: 505
Registered: April 2014

Karma:

Senior Member

Gordon,

Since you are certain that it is consuming coolant, you will need to protect the engine from the possibility of coolant sitting in the cylinders and causing rust over the winter storage period.

If procrastination wins, at a minimum, you need to drain the rad and engine block of coolant, and preferably fog the engine to protect the cylinder walls.

Draining just the rad won't totally eliminate the risk of coolant migrating into the cylinders. You need to pull the block drains as well.

Les Burt
Montreal
'75 Eleganza 26'

> On Dec 11, 2017, at 11:33 PM, Gordon Gibson wrote:
>
> Thanks to all for your helpful comments.
>
> But....(sigh)....looks like the diagnostic for an easy fix is incorrect. I pulled the modulator vacuum hose off the manifold and it was bone dry.
> Also, disconnecting it made no difference to the white smoke billowing out the exhaust pipe. The final "nail in the coffin" is probably that the low
> coolant warning light lit up after 15 minutes of idling.
>
> So I guess I have to accept that Prestone is finding its way into the combustion chambers somehow. AAAARGH I guess there is no quick fix and that
> the problem is either a blown head gasket, or a crack in the block or a cylinder head.
> --
> Gordon Gibson
> 1976 23" Norris Upfit
> Montreal West, Quebec, Canada
>
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[Message index]

		Re: [GMCnet] Transmission vacuum modulator leaking? By: jimk on Sat, 09 December 2017 23:27
		Re: [GMCnet] Transmission vacuum modulator leaking? By: GMC.LES on Sun, 10 December 2017 05:18
		Re: [GMCnet] Transmission vacuum modulator leaking? By: gibsongo on Sun, 10 December 2017 09:15
		Re: [GMCnet] Transmission vacuum modulator leaking? By: Ken Burton on Sun, 10 December 2017 10:15
		Re: [GMCnet] Transmission vacuum modulator leaking? By: gibsongo on Sun, 10 December 2017 11:18
		Re: [GMCnet] Transmission vacuum modulator leaking? By: bdub on Sun, 10 December 2017 11:28
		Re: [GMCnet] Transmission vacuum modulator leaking? By: GMC.LES on Sun, 10 December 2017 11:45
		Re: [GMCnet] Transmission vacuum modulator leaking? By: Larry on Sun, 10 December 2017 15:55
		Re: [GMCnet] Transmission vacuum modulator leaking? By: gibsongo on Mon, 11 December 2017 22:33
		Re: [GMCnet] Transmission vacuum modulator leaking? By: GMC.LES on Mon, 11 December 2017 23:02
		Re: [GMCnet] Transmission vacuum modulator leaking? By: Ken Burton on Mon, 11 December 2017 23:57
		Re: [GMCnet] Transmission vacuum modulator leaking? By: gibsongo on Tue, 12 December 2017 10:49
		Re: [GMCnet] Transmission vacuum modulator leaking? By: bdub on Tue, 12 December 2017 11:09
		Re: [GMCnet] Transmission vacuum modulator leaking? By: jimk on Tue, 12 December 2017 11:39
		Question By: gibsongo on Wed, 20 December 2017 09:36
		Re: [GMCnet] Question By: Kingsley Coach on Wed, 20 December 2017 11:23
		Re: Question By: Matt Colie on Wed, 20 December 2017 20:28
		Re: Question By: gibsongo on Sun, 24 December 2017 12:31
		Re: Question By: Matt Colie on Sun, 24 December 2017 18:56
		Re: [GMCnet] Question By: GMC.LES on Tue, 26 December 2017 08:25
		Re: [GMCnet] Question By: gibsongo on Tue, 26 December 2017 21:43
		Re: [GMCnet] Question By: GMC.LES on Tue, 26 December 2017 22:30
		Re: Question By: DetroitDan on Wed, 27 December 2017 14:49
		Re: [GMCnet] Question By: powwerjon on Wed, 27 December 2017 15:39
		Re: [GMCnet] Transmission vacuum modulator leaking? By: jhbridges on Wed, 20 December 2017 10:09
		Re: [GMCnet] Transmission vacuum modulator leaking? By: gibsongo on Thu, 15 February 2018 20:12
		Re: [GMCnet] Transmission vacuum modulator leaking? By: James Hupy on Thu, 15 February 2018 21:13
		Re: [GMCnet] Transmission vacuum modulator leaking? By: Matt Colie on Fri, 16 February 2018 07:55
		Re: [GMCnet] Transmission vacuum modulator leaking? By: gibsongo on Fri, 16 February 2018 20:54
		Re: [GMCnet] Transmission vacuum modulator leaking? By: James Hupy on Fri, 16 February 2018 21:18

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