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Re: [GMCnet] Transmission vacuum modulator leaking? [message #329222 is a reply to message #329221]

Fri, 16 February 2018 21:18

James Hupy

Messages: 6806
Registered: May 2010

Karma:

Senior Member

No I was just stating what should be obvious. These engines are 40 years
old, they have been "rode hard and put away wet" to coin an old phrase. If
you have a choice and know the history of the heads you intend to use, then
the fewer heat/cool cycles they have experienced, the better for you. All
we can do is the best we can. No guarantee about cracks, the previous
history of the heads is largely unknown.
Jim Hupy

On Feb 16, 2018 6:55 PM, "Gordon Gibson" wrote:

> James - proper torque certainly makes good sense, but I'm not sure I
> understand the comment about avoiding heat-cycled castings. Any used head
> is
> going to have experienced lots of "heat up to operating temp. - cool down"
> cycles. Are you suggesting using new aluminum heads? Does anyone have
> experience - positive or negative - with these?
> --
> 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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