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Old 06-12-2021, 07:44 PM   #1
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Leaking exhaust gasket - any fix short of replacing ??

2007 w24.

a very small leak on driver side rear that is blowing some hot air onto spark plug wire and making boot brittle just discovered and likely a long time issue0 - a small amt of hardening of boot on plug next to it.

a slight sound diff from passenger side, not loud at all mostly just a diff sound.

the noise, would not be noticed if not really listening, so a small leak.

honestly have not found the actual 'hole' visually hard to get to tried a camera to take photo0, but if can be found and accessed, is there something that can be done to 'plug' it ?

was thinking of small pieces of metal in conjunction with asbestos/heat rope/cloth but if the metal not shoved in and holding cloth will certainly not last and be blown out - just trying to delay replacement.

just seems so hard to get to and so hard to remove if any of the exhaust bolts are rusted on, even the head shield could be nearly impossible to remove - seems a real PIA for a diy job.

any guidance is appreciated.

as always would be pretty easy on a pickup but 10x worse due to little access on mh of course.
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Old 06-12-2021, 08:29 PM   #2
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I would be worried about exhaust heat erosion. When the engine is working hard I would bet there is fire coming out.
It is a tossup where the erosion takes place on the head or the manifold.
Myself I would repair it.
The exhaust system removes heat from the engine. And to do it job correctly there should be no leaks.
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Old 06-13-2021, 01:40 AM   #3
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Purchase a designated length of the following sheath and then cut from it equal lengths for each wire. Remove the boot and wrap the sheath & hold in place (flush with end of boot) when replacing the boot back onto the plug.

The following sheaths are already cut to certain length. Purchase of the product can be made for 1 yard or more than cut to your length. It's also sized accordingly in diameter as well.

https://www.summitracing.com/parts/dei-010409
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Old 06-14-2021, 03:03 AM   #4
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thanks for suggestion but have already bought some maybe better than those - https://www.ebay.com/itm/383287768321

got new wires and new 'fake' iridium 41-101 plugs, so need time.

those you linked are like what is already on the wires, seem just a single layer, those ref above are much thicker and longer, will add to the back 2 wires before driving again, eventually will add to all cylinders, now it seems rain everyday so hard to have much time to get it done.


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Originally Posted by udidwht View Post
Purchase a designated length of the following sheath and then cut from it equal lengths for each wire. Remove the boot and wrap the sheath & hold in place (flush with end of boot) when replacing the boot back onto the plug.

The following sheaths are already cut to certain length. Purchase of the product can be made for 1 yard or more than cut to your length. It's also sized accordingly in diameter as well.

https://www.summitracing.com/parts/dei-010409
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Old 06-14-2021, 06:13 AM   #5
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Fix it correctly, it can affect your fuel mixture and lead to bigger issues. IMO any simple external patch won’t last. When climbing a hill, these manifolds glow red. When I did mine, I replaced the crappy GM studs and nuts with stainless ARP exhaust studs. They are designed for this type of abuse. Never had a problem again.
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Old 06-14-2021, 06:58 AM   #6
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Quote:
Originally Posted by SmilingSam View Post
thanks for suggestion but have already bought some maybe better than those - https://www.ebay.com/itm/383287768321

got new wires and new 'fake' iridium 41-101 plugs, so need time.

those you linked are like what is already on the wires, seem just a single layer, those ref above are much thicker and longer, will add to the back 2 wires before driving again, eventually will add to all cylinders, now it seems rain everyday so hard to have much time to get it done.
What you are proposing equates to putting a Band-Aid on a broken arm. Find the source of the leak and repair it properly before it gets worse. If you have a leak around the manifold where it bolts to the cylinder head it will eventually burn a spot in the cylinder head and you'll be in for a really extensive and expensive repair. Once the leak becomes bad enough you will see the check engine lamp come on because the exhaust flow isn't correct passing by the upstream oxygen sensor.
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