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Header gaskets again.....

Kain

Kain

3/4 ton status
Joined
Mar 16, 2011
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Location
Lubbock Texas
blew a header gasket yesterday so I changed it and took for a drive and made it 3 houses down and it blew again. so today i am going to pull it and put a strait edge on it to see if it is indeed strait.
if not get a hammer and fix it. be a few days before the gaskets come in.

I HATE HEADER GASKETS!!!!!!!
 
To head or collector flange ?

To head I use 2 sets of stock manifold gaskets from fel-pro and never leak .

Collector go ball socket and be done .if not then make sure the exhaust is hung dead perfect or they blow out .
 
To head I used that and it blew
Going to get the steel lamanite that lasted
My buddy uses rimflex but there out of stock
 
I have cheapo summit ones on my Yukon, they haven't blown out. Yet. But I put a thin layer of silly-cone on both sides of the gasket. I've done this to anything exhaust that uses a gasket and haven't blown anything out yet.
 
Is it possible the flanges are no longer straight? How thick are they?

I’ve noticed some companies are suggesting straight silicone without a gasket (my Sanderson’s do not have gaskets at the head).
 
Remflex are really good even if the flange isn't dead flat anymore. It's a compressible graphite that starts out 1/4" thick. No re-torque required either.
 
They will be in next Saturday but I put a strait edge on it and the 1 and 7 where higher than 3 and 5 so I took a flat file and made it even as I could get it

I got some cometic steel core laminate for now and I’ll just change em out

it was off an 1/8 of an inch, I am surprised it didn’t blow sooner

3A2E4C3F-6C4B-4B6D-B291-0EE467818227.jpeg
 
What about cutting the flanges so each part of the gasket acts independently?
 
well i got new gaskets on and it is acting weird. the throttle position sensor is not reading the o2 is still going bonkers and it is loping bad after 15 seconds of running. going to hook shop vac up make sure no leaks. just hook up to blow and use soapy water and should be no leaks but going to make sure. then ill call Edelbrock in the morning

sweetk30 thats what i did and it still blew em
 
I had a header leak last year. One hot rod shop told me that if the header flanges are perfectly flat and the head is clean, then you don't need gaskets. They put my headers on a beltsander, I've been gasket free for a year now with zero leaks
 
well im going to go down and have that done cause it blew in 20 min.
 
ktmoutfront said:
I have seen the same issue 3 times on 3 different engines. The bolts were bottoming out. Looked and felt like they were tightening down. Ran a flat ended tap in the holes and no more leaks.

Just something to think about.
Click to expand...
now you say that i was looking for header bolts this year for a project and there is different lengths of them . maybe you got the longer by mistake .

run a few in till bottom and check thickness gap and compare .
 
sweetk30 said:
now you say that i was looking for header bolts this year for a project and there is different lengths of them . maybe you got the longer by mistake .

run a few in till bottom and check thickness gap and compare .
Click to expand...

The length is the first thing I check. Bottoming out is the second.
 
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