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Old 02-16-2018, 07:15 PM   #1
Imprezaspeed07
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Member#: 154863
Join Date: Jul 2007
Chapter/Region: MAIC
Location: New Orleans
Vehicle:
2007 Impreza WRX
World Rally Blue

Default Very hot engine bay after rebuild

Hi,

I cracked a ringland last year on my 07 WRX and had my engine rebuilt by a local Subaru engine builder. He basically deleted all of the extras, like tgv, air pump etc. He also installed forged Pistons and upgraded rods and crank. It runs well but the engine bay is super hot now. I can barley touch the hood prop because it's so hot. Is this normal?

Also a side note I have a turbo blanket and ewg. It was hot before the ewg.
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Old 02-19-2018, 07:16 PM   #2
europa
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I couple of suggestions/best guesses: Are your coolant temperatures normal? Are your fans running, especially if you turn the A/C on? Have you tried to use a temperature sensor/heat gun to measure the temperatures? Otherwise, can you detect the area that the heat is being generated if you run the engine with the hood open?
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Old 02-21-2018, 01:18 AM   #3
I_R_A
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Join Date: Feb 2018
Default my bay was hotter with a built motor too

Heading a bit tongue in cheek.. not a jerk.

I just did a full ground up an engine (this is post 1/3 before I can post it for sale due to abandoning the build for personal reasons).

Don't forget you put on forged pistons and rods. If you tuned it up at all the heat duty on your engine, intercooler and everything else changed to make more horsepower with no changes to coolant system or airflow, your engine bay will be hotter with a performance engine.

Did you pull heatshield from the downpipe?

Get an IR gun from Amazon for 18 bucks and find what is hotter than normal.

Mine got hot once after a rebuild..... one of the fans was not plugged back in all the way. Finding that was a bitch... I always listen for the click now.
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Old 03-02-2018, 12:00 AM   #4
Imprezaspeed07
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2007 Impreza WRX
World Rally Blue

Default

I'll check the fans and see if that is the issue, but I am actually not making anymore power with forged internals it is just built to handle more power and track days. If I can find a fan not running I'll grab an ir gun
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