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Old 09-15-2016   #11
BigJohn
 
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Default Re: Cyl Head coolant plug
Quote:
Originally Posted by secondchance View Post
Yes. But very few ZR-1 owner would let the car sit outside in freezing temperature with only water in the cooling system. Don't you think?
There is always that one unforeseen time!!!
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Old 09-15-2016   #12
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Default Re: Cyl Head coolant plug
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Originally Posted by BigJohn View Post
There is always that one unforeseen time!!!
Agreed!
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Old 09-15-2016   #13
DRM500RUBYZR-1
 
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Default Re: Cyl Head coolant plug
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Originally Posted by BigJohn View Post
There is always that one unforeseen time!!!
Unforeseen will quickly lead to Unforgettable, for all of the wrong reasons.
Yet, it likely should be done for the stated reasons.


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Old 09-15-2016   #14
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Default Re: Cyl Head coolant plug
Just for clarity, there is no chance in #$%^ i'm going to leave a $50k engine out in the cold to freeze, and without any antifreeze at that. Not going to happen. I don't want to spew water all over the dyno room at 7500 rpm, which has been known to happen with these particular plugs.
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Old 09-15-2016   #15
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Default Re: Cyl Head coolant plug
That little core plug at the end of the head won't do squat to protect the engine from freeze damage. Its main purpose is for emptying core sand from that end of the head after the head is cast. In the inprobable event an LT5 should ever experience serious coolant freezing the block and heads will be total scrap afterwards.
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Old 09-15-2016   #16
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Default Re: Cyl Head coolant plug
Up here in the backwoods of New England; we have times when there is no power for weeks at a time !
Is that not correct Steve?
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Old 09-15-2016   #17
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Default Re: Cyl Head coolant plug
Quote:
Originally Posted by Jagdpanzer View Post
That little core plug at the end of the head won't do squat to protect the engine from freeze damage. Its main purpose is for emptying core sand from that end of the head after the head is cast. In the inprobable event an LT5 should ever experience serious coolant freezing the block and heads will be total scrap afterwards.
100% correct. It's a sand casting hole and an expansion plug. The procedure done by the OP is a great way of prevent disaster down the road. Especially if you modify any engine beyond its original and predictable engineering design.
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Old 09-16-2016   #18
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Default Re: Cyl Head coolant plug
Quote:
Originally Posted by BigJohn View Post
Up here in the backwoods of New England; we have times when there is no power for weeks at a time !
Is that not correct Steve?
Oh yes it is, and there are days we leave the house at 50 or 60 degrees and come home in sub freezing temps. All that being said, I've always wondered how much good those small holes would do for an engine that froze.
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Old 09-16-2016   #19
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Default Re: Cyl Head coolant plug
Steve
What about those solar panels?
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Old 09-16-2016   #20
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Default Re: Cyl Head coolant plug
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Originally Posted by Mystic ZR-1 View Post
Steve
What about those solar panels?
Solar Panels!

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