C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old May 28, 2012 | 12:02 AM
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so my car is running hot. its a 87 and its running about 230 steady after I put a new motor in it. any ideas ? hmm
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Old May 28, 2012 | 01:05 AM
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Originally Posted by jesse_c4
so my car is running hot. its a 87 and its running about 230 steady after I put a new motor in it. any ideas ? hmm
A little more info? Engine, stat temp, timing, fans?
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Old May 28, 2012 | 01:39 PM
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Default more ino

ok, here is some more info. engine is a 350 5.7v8 L98
stat is a 180
stock fans that are working and hav been checked.

thank you for your input.
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Old May 28, 2012 | 01:41 PM
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Default 160 stat

got a 160 stat that im gonna pop in.
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Old May 28, 2012 | 01:46 PM
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OK, now how long does it take to reach that temp and under what conditions? You could have an air pocket, the timing could be off, the temp sensor could be bad and not kicking the fan on at 228. Do some more diagnostics and let us know what's goin on .
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Old May 28, 2012 | 08:50 PM
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im thinking its the timing because i set it myself, without a gun. fan is kicking on and the main fan is on a manual switch so its on. thank you for the reply.
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Old May 28, 2012 | 08:52 PM
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ohh and conditions are at idle. its been in the garage since i dropped the new motor in and i want to get the bugs out before I take it for a ride.
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Old May 28, 2012 | 09:08 PM
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Originally Posted by jesse_c4
im thinking its the timing because i set it myself, without a gun. fan is kicking on and the main fan is on a manual switch so its on. thank you for the reply.
You really need to get a timing light and do it properly, guessing doesn't work...Don't forget you have to unplug the "electronic timing advance" to get it timed right..its the tan and brown wire under the brake booster..Also a 160 degree thermostat won't make it run any cooler, and since you live in NY you may have a problem with it running to cool when the weather gets colder..I would leave the 180 stat in...Last but not least you should pull the radiator shroud and clean the area in front of the radiator, this area gets clogged up with leaves and trash and should be cleaned at least every other year........WW

Last edited by WW7; May 28, 2012 at 09:31 PM.
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Old May 28, 2012 | 10:24 PM
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Originally Posted by WW7
You really need to get a timing light and do it properly, guessing doesn't work...Don't forget you have to unplug the "electronic timing advance" to get it timed right..its the tan and brown wire under the brake booster..Also a 160 degree thermostat won't make it run any cooler, and since you live in NY you may have a problem with it running to cool when the weather gets colder..I would leave the 180 stat in...Last but not least you should pull the radiator shroud and clean the area in front of the radiator, this area gets clogged up with leaves and trash and should be cleaned at least every other year........WW
Get that timing right (no more than 8 degrees) than take a spin and see how it goes.
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Old Jun 1, 2012 | 09:10 AM
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Default time to time !

OK, I bought a timing light at autozone and got home and hooked it up. I could not see the mark so I started from scratch and pulled the dist. and set the timing again. It runs better and it has cooled down. with the 160 stat temp is seeing 170's which is nice. still think the timing is off as I can not see the mark on the harmonic balancer with the timing light. hmm i must be doing something wrong here.
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Old Jun 1, 2012 | 10:08 AM
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Originally Posted by jesse_c4
OK, I bought a timing light at autozone and got home and hooked it up. I could not see the mark so I started from scratch and pulled the dist. and set the timing again. It runs better and it has cooled down. with the 160 stat temp is seeing 170's which is nice. still think the timing is off as I can not see the mark on the harmonic balancer with the timing light. hmm i must be doing something wrong here.
Clean the mark and the indicator, mark the slit on the balancer with white paint. I'm thinkin that you may be off a tooth on the dizzy if you're missing the mark or you may be off that much. Set the timing at 8 degrees, don't forget to unplug the advance near the brake booster othewise you wont see the mark. Get back to us.
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Old Jun 3, 2012 | 07:17 AM
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Its possible your balancer has slipped. This happens with some of them when they get old...WW
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Old Jun 7, 2012 | 04:53 PM
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i put a new balancer on when i dropped the motor in. but thank you for the reply.


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Old Jun 7, 2012 | 04:55 PM
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ok, i tried to set the timing again and it has cooled down to 180ish and it seems to run ok but on the text drive I had no power so the timing is still off.
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