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Discussion Starter · #1 · (Edited)
Short version: If you own an EVO 10 you must run the stock or some sort of exhaust manifold heat shield or you will eventually burn your firewall, valve cover, wiring, or the car to the ground.

Long version: Yesterday we had an EVO 10 on our dyno for tuning. During some preliminary cruising and getting things set up it was noticed there was smoke pouring out from the back of the engine bay near the turbo. Sure enough the material on the firewall was burning and a hole about the size of a golf ball had formed. I quickly got some water and put it out but the damage had already been done. The wire loom had melted off a wiring harness in the area and the firewall pad had been burned up pretty good. I have no doubt in my mind if this car had the plastic valve cover it would have melted also.

I noticed when spraying the area with water that the water was actually sizzling off of the strut tower brace. Needless to say it was HOT back there. And this was without doing any WOT pulls...

This isn't the first time heat has taken its toll on an EVO 10 engine bay I have seen ABS modules burn up and plastic valve covers melt.

If you have an EVO 10 RUN THE STOCK EXHAUST MANIFOLD HEAT SHIELD, IF YOU BUY A TURBO KIT MAKE SURE IT COMES WITH PROPER SHIELDING. Stock frame turbo, PTE turbo, Garrett turbo.. it doesn't matter. The area around the turbo on these cars does not do well with alot of heat like the 8s and 9s did.

My main goal with this post is to warn the owners of these cars about this as I don't want anyone to have their car burn to the ground or even worse. You will notice in our turbo kit we have both a manifold heat shield AND a firewall heat shield.




 

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WOW... Isnt this what happened to Ryan Gates?

Thanks for the heads up!
 

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Not many options out there for shields that i know of, mabye we can get good list going?

1. if you get t3 + kit some come with sheild.
2. stay with stock ported mani use stock shield.
3. Map makes a firewall heat shield.
http://www.evoxforums.com/forums/showthread.php?t=56814

Mabye good to list options with the write up to offer solution to avoid the above?
 

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Discussion Starter · #5 ·
Sorry about that, I edited the post to make it a little less confusing. I have seen alot of cars with swapped stock turbos on stock manifolds and the installer didn't bother putting the shield back on also.

JESUS! Please specify you are talking about a tubular manifold in the beginning. I nearly popped myself until I scrolled down a page to pics :(
 

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I along with countless others have been running a full race manifold without any issues

I've personally put on 15k kms on my HKS gtII/manifold combo along with some 1500km road trips and nothinG is melted or showing signs of it.

My manifold is dressed with 2000 degree coating.

I do still retain the stock firewall heat shield though.

I'm not arguing with u but there wasn't many options at the time and haven't experienced any issues whatsoever

AV
 

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Thanks for the tip, makes my decision to stick to stock replacement that much easier! AMS FTMFW!

Sent from my HTC Glacier using AutoGuide.com App
 

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I am hoping someone will produce a heat shield bracket that will bolt on to the stock heat shield to the valve cover or strut bar. Or someone should manufacture a heat shield designed to fit various aftermarket exhaust manifolds.
 

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Also note this happened on the dyno. Big difference then when you are driving and there is a ton of airflow over that area drawing any heat immediately away, air makes a very good insulator.
 

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Discussion Starter · #16 ·
You bring up a good point but I have seen this happen at the track also. We also have 4 fans running on the dyno at all times.

Also note this happened on the dyno. Big difference then when you are driving and there is a ton of airflow over that area drawing any heat immediately away, air makes a very good insulator.
 

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radiant heat coming off of manifold with no shield to check it is a bad thing... if the heat shield is burning at 3-4 inches from the manifold, imagine what all of the plastic around that area is doing. Plus any oils that are in the area not moving. Look at hiboosts car for an example as to what kind of damage an engine fire (different cause) can do.
 
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