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  #201  
Old 11-05-2018, 06:29 PM
Jorski Jorski is offline
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In a Corvette this engine runs up to 228 degrees before the fans turn on
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  #202  
Old 12-10-2018, 01:09 PM
88 PS190 88 PS190 is offline
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Quote:
Originally Posted by Jorski View Post
In a Corvette this engine runs up to 228 degrees before the fans turn on
Just for the general knowledge bank - there is a vast difference between pressurized and open loop cooling.

Plain water boils off at 212 at sea level - less at altitude.
Pressure on that water increases the boiling temp, but to reach 228 degrees you need about 8 lbs of pressure in the system.

A corvette has both pressure (probably a 15 lb system) and Antifreeze - assuming 15 lbs and 50-50 antifreeze water mix that coolant should remain "liquid" to at least 260 degrees.

But you also have to remember - the temperature is not the temperature everywhere in the system, it is the temperature at the fan switch/coolant temperature sensor. It can be way hotter in pockets so you have to have a safety margin such that there is no world in which you reach "boiling" anywhere in the system as that boiling water doesn't cool the engine and can form air pockets leading to overheating.
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  #203  
Old 08-04-2019, 06:29 PM
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teddy teddy is offline
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I have a 93 LT1 with the same high mounted alternator bracket @jersydave has pictured in Post 62. No overheating to date. I was about to do this fix as a preventative measure. I pulled the bracket and it appears to me that to drill a hole where the plug is in the front of the head will compromise the bracket's structural integrity. Has anyone done this fix on an early LT1 with the high mount alternator bracket.
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  #204  
Old 03-28-2020, 09:40 PM
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Rocketboy Rocketboy is offline
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How can you tell the 160 from the 143? I was thinking my 160 up by the air cleaner had holes drilled in it.......

Also- this update that is being done- it is connecting heads to exhaust manifold? All in one path? Is that correct?
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  #205  
Old 04-07-2020, 02:26 PM
zzpich zzpich is offline
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What a fantastic thread! I recently purchased a 94 Prostar 205 with LT-1 and am considering plumbing the front heads to improve the cooling performance... Only question is do you think trying to remove the plugs on front of the heads of a 25yr old engine is asking for trouble?
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  #206  
Old 04-07-2020, 03:31 PM
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Rocketboy Rocketboy is offline
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Originally Posted by zzpich View Post
What a fantastic thread! I recently purchased a 94 Prostar 205 with LT-1 and am considering plumbing the front heads to improve the cooling performance... Only question is do you think trying to remove the plugs on front of the heads of a 25yr old engine is asking for trouble?
If you find the kit to do this let me know. Can't seem to find it anywhere.
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  #207  
Old 04-07-2020, 03:57 PM
zzpich zzpich is offline
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I plan on buying the parts, seems straightforward... If the plugs come out
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  #208  
Old 04-09-2020, 12:52 AM
waterskibrad waterskibrad is offline
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my plugs came out no problem but my issue was my impeller pump was worn out. symptom over heating at hot start would put engine in limp home mode. I noticed when running on trailer not a bunch of water pouring out exhaust, I first installed a new impeller same low water flow, than I replaced the whole impeller pump ASSY, than lots of water flow. I guess the brass pump ASSY itself just wore out---all good now for 3 seasons
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  #209  
Old 04-20-2020, 05:20 PM
zzpich zzpich is offline
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I made a first attempt to remove the plugs and failed miserably - I broke my (supposedly impact) 3/8 to 1/4 adapter while trying to remove the first plug with a breaker bar. It broke so quickly that I am inclined to attribute it to bad adapter and I still think the plugs may be removable... Anyone have a recommendation for a good 1/4 to 3/8 or 1/4 to 1/2 adapter?
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  #210  
Old 05-17-2020, 11:33 PM
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Rocketboy Rocketboy is offline
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I did this update today. Just went and got a bunch of brass fittings and some hose and did it.

The old bypass seem to be plugged as it was nasty!

My only worry is the kid at the parts store sold me gas line- will that handle that hot temps of the water??

Other than that it was easy and ran 160 after that. I did a mile WOT and then pull back to idle and it hit 180 and dropped back down. In the past this year that is when it would spike.

Hope this was the fix!!
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