New Crate Motor Overheating
09-26-2018, 12:47 PM
#23
Safety Car
That's my 93 I really work on them this will be my 4th C-4 I have fixed the over heating problems on , Big *** radiator new pump 160% stat 160% fan switch .I am in Houston 110% here for 6-7 mounts out of the year ,I know heat .. If cats were plugged up enough to over heat the thing I don't think it would ne running right anyway .. Just saying .
09-26-2018, 02:55 PM
#25
I am fairly sure you have a plug cat. Your symptoms were the same as mine. Here is my thread as I was figuring my note. Good luck to you.
https://www.corvetteforum.com/forums/c4-tech-performance/4035003-oil-temp-261-coolant-temp-241-no-airdam-the-cause-3.html#post1597493196
https://www.corvetteforum.com/forums/c4-tech-performance/4035003-oil-temp-261-coolant-temp-241-no-airdam-the-cause-3.html#post1597493196
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Jake Knight (09-27-2018)
09-26-2018, 11:35 PM
#26
[QUOTE
When I press on the gas, the temperature goes up. When I let it coast, or idle, it goes down.
[/QUOTE]
Sounds like a coolant flow problem. Not enough coolant through the engine at speed. I'm assuming the correct amount of coolant is in the system, and the hoses are not blocked.
When I press on the gas, the temperature goes up. When I let it coast, or idle, it goes down.
[/QUOTE]
Sounds like a coolant flow problem. Not enough coolant through the engine at speed. I'm assuming the correct amount of coolant is in the system, and the hoses are not blocked.
09-27-2018, 07:42 AM
#28
Solution!!!!
does your car have a plugged cat or multiple plugged cats? i recently had my 86 doing what you describe and the way i pinpointed it was i took a laser temp reader gun and got it before and after the cats and the temps were so far apart (much lower behind the cat than in front) i knew my issue was this.
my trans tunnel would get so hot and my oil temps would go sky high.
is it your oil going high? coolant? both?
my trans tunnel would get so hot and my oil temps would go sky high.
is it your oil going high? coolant? both?
This is solved. I removed the O2 sensor from before the cat and drove it. I was able to get the car up to 80mph with no issues and was on the road for 20 mins. Temp stayed low and car ran fine, albeit loud
I'm going to swap out the cat or something like that.Here is my take-away: The cat is able to be partially blocked causing a gradual heat build up in the engine. And since the exhaust runs next to the oil cooler, when the exhaust overheats, then the oil temp will go up as well. I had plenty of power, although because of the heat issue, I couldn't get up over 60mph without the temp rising to 258 or above.
I appreciate all of the help on this problem that has plagued me for a year!!
Jake