too much heat

[fatality]

My car does not have an overheating issue, but it seems like it is producing too much heat. I can actually see the heat coming off the engine through the cracks on the side of the hood. even when I shut it off for 20-30 minutes the heat doesn't dissipate too well. but the water temp gauge is right there 3/8 of the way from the bottom. max it will ever go up is half way to the red. is this normal for our cars and I'm being paranoid or is this abnormal.

Regardless, what would ya'll suggest as the best mod to remove heat from the engine bay.

 

[Bishop92t]

7m is a very hot motor, especially the turbo. It's normal to see heat waves coming out the sides of the hood. If you're really worried buy an aftermarket guage, the stock one is horribly inaccurate.

 

[supra90turbo]

Yes! Buy a good water temp gauge (I prefer Greddy) Defi is good, too.
You can always shim the back of the hood up. It will work at a standstill, but not while moving I believe...
Make sure all heat shields are in place as well. They help immensely!

 

[SupraDreamPDR]

check out these free and easy mods to help heat escape from under your hood.
http://www.jblmk3.com/id50.htm

 

[tonysupra]

A lot of people don't have an undertray under their car. Check to make sure yours have it and it's not ripped or missing a bolt. That plastic undertray is a big part of the cooling system. Members have told me an increase in 10C on the highway without it.

 

[fatality]

check out these free and easy mods to help heat escape from under your hood.
http://www.jblmk3.com/id50.htm

If I remove the gasket at near the hinges, wont water leak in when it rains or when I wash the car. Rain water at running temp might crack the block. or is the gap not big enough. That's a good website though. I didn't know that the first cat right under the turbo stores alot more heat than the second. I've got the second one under the car removed, but haven't saved up enough for a downpipe yet.

 

[SupraDreamPDR]

If I remove the gasket at near the hinges, wont water leak in when it rains or when I wash the car. Rain water at running temp might crack the block. or is the gap not big enough. That's a good website though. I didn't know that the first cat right under the turbo stores alot more heat than the second. I've got the second one under the car removed, but haven't saved up enough for a downpipe yet.

not sure on that one... although i know it would take alot of water to do it... like maybe driving through a deep, deep puddle or something.

 

[Horsepowerfreak]

It is true that the 7M is a motor that tends to run on the warm side. This is normal but there are many ways to lower under hood temps. One is to wrap any exhaust that you can. This can lower temps substantially as well as improve spool time and response. Like stated above, invest in a really good temperature gauge. This will help you monitor engine temps and is a good tool to help diagnose any issues that can arrive when idling or moving slow compared to freeway speeds. Another great tool is the infrared temp gun. They are relatively cheap now and in my opinion, belong in every tool box. They can help with heating and cooling issues as well as diagnosing something as simple as a bad wheel bearing.

 

[Bishop92t]

If I remove the gasket at near the hinges, wont water leak in when it rains or when I wash the car. Rain water at running temp might crack the block. or is the gap not big enough. That's a good website though. I didn't know that the first cat right under the turbo stores alot more heat than the second. I've got the second one under the car removed, but haven't saved up enough for a downpipe yet.

Nope. I've had that gasket removed for a couple years now with no ill effects. I drive through some pretty nasty rain storms too. The lip of the hood is far enough away from the firewall that rain doesn't get in. If you purposefully sprayed water directly in you might be able to get water on the engine, but rain has no chance. You wouldn't have to worry about cracking the block, it would take more then a little rain to do that. Worst case if you tried your hardest to get water in there you might get your spark wires wet and the car might not run until they dried.

 

[Bishop92t]

Kind of an old pic but it's the best I could find. Wrapping that upper intercooler pipe kept some of the exhaust heat out, and wrapping the downpipe reduced heat in the engine bay considerably.

 

[SupraDreamPDR]

man, i cant believe i didnt think to wrap my BIC DDP!! now i gotta remove it and wrap it. :cry:

 

[jdub]

Ceramic coatings on your exhaust parts does wonders for engine bay temps...looks good too :naughty:

 

[jkbmkiii]

Ceramic coatings on your exhaust parts does wonders for engine bay temps...looks good too :naughty:

Iam loving all my Ceramic coated parts! Jdub, how much to CC a DP for me ????

 

[Justin]

man i should have asked thsi on here instead of supraforums... i asked the same question and had people saying

"uhhh, its an internal combustion engine, of course it's hot"





Great thread though... i'm definatly going to wrap my DP and thinking about getting a turbo blanket... wonder if there are any that fit stock turbo

 

[Bishop92t]

Ceramic coatings will help, but they don't hold in heat perfectly. As visually criminal as it may be, a ceramic coat with some heat wrap would be a good combination especially on the exhaust side.

 

[supramike7m]

yep i removed my gasket and added washers, wrapped my new turbo and new manifold and keep thngs real cool under there. i remember when she was stock i would touch the intake mani, intercooler pipe and random shit. they would get really hot not no more. the wrap and remove of the gasket helps alot. and a little off topic, but bishop your car is soo sexy.
Mike

 

[fatality]

check out these free and easy mods to help heat escape from under your hood.
http://www.jblmk3.com/id50.htm

Man, that little trick does wonders, just tried it on my friends MK4 and it is running way cooler. Will do it to mine as soon as I get my crank pulley problem solved (now that it has been tested on any other car than mine :evil2: )

 

[Piratetip]

Links and prices on some common heat shielding.

Crappy blanket. $70+
http://www.innovativetuning.com/catalog/product_info.php?products_id=2857

Better blanket. $90+
http://store.summitracing.com/partd...923290+4294845359+4294787325+115&autoview=sku
and
http://store.summitracing.com/partd...HE-15002&N=700+400356+304217+115&autoview=sku

Best $150+
Boost logic blanket.
http://www.boostlogic.com/xcart/product.php?productid=45&cat=23&page=1
http://www.boostlogic.com/xcart/product.php?productid=46&cat=23&page=1