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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

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Old 07-31-2007, 02:56 AM   #1
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exhaust manifold sealer?

Hey guys,

My 4Runner had an annoying little exhaust leak, so I decided to fix it the other day. Found another manifold, cleaned it, had it planed, fixed/helicoiled the studs in the head, got a new gasket and flange gasket donuts, and bolted it all down. Still leaked, but it was a completely different tone. Just a side note I was torqueing down the 14mm nuts from the center out with very gradually increasing torque (probably 5 or 6 runs, finishing at maybe 35 ft-lb or torque)

So yesterday I tried it again, reused the old gasket (had only driven like 10 miles with it) and it's the same story. The surface of the head may very well be a little warped and maybe that's why I'm having no luck.

For a final try here's my idea: take it all off again, get a NEW gasket and NEW flange gaskets and coat the gasket on either side with some sort of high-temp sealant like Ultra Copper Permatex.

I'd like to get some opinions on this project...
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Old 07-31-2007, 04:09 AM   #2
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maybe try these gaskets ? http://www.remflex.com/
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Old 07-31-2007, 04:18 AM   #3
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I assume machining heads is beyond the realm of 'what I want to do right now'?
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Old 07-31-2007, 04:27 AM   #4
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manifold leak

I seriously doubt any sealer, even the Permatex will hold up to the heat and pressure. If resurfacing the head surface isn't an option right now, on a budget I would be tempted to possibly used two gaskets and double them up.
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Old 07-31-2007, 04:29 AM   #5
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I seriously doubt any sealer, even the Permatex will hold up to the heat and pressure. If resurfacing the head surface isn't an option right now, on a budget I would be tempted to possibly used two gaskets and double them up.
and have you gona after it with the wetstone trick, granted if its leaking its probably more than you'd ever get like that, but worth a shot, for the effort, course thats probably harder to do in the truck. lol.
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Old 07-31-2007, 04:39 AM   #6
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manifold leak

Also worth a try 04 Rocko Taco, good thought.
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Old 07-31-2007, 04:47 AM   #7
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Come on, its oh so easy out of the truck... lol.
i know, just yank your motor out of there, and we'll tear into it when i come up...

Click the image to open in full size. Click the image to open in full size.

EDIT: I know I know, nitrile gloves and bare feet, only in the south. lol.
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Old 07-31-2007, 06:17 AM   #8
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if all else fails man, here is a good consition 22R head for sale. (guy also has another head that needs rebuilding, and a block, also)

http://www.yotatech.com/f107/fs-22r-head-120566/
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Old 07-31-2007, 07:52 AM   #9
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I used that permatex ultra copper on my downey headers and it held up fine. when I took the headers off two years later when I parted out the truck the permatex was still in excellent shape, actually still holding the headers on tight after i took the bolts out. the permatex wasn't dried out or burnt, still could peel it off (rubbery...)
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Old 07-31-2007, 08:25 AM   #10
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Quote:
Originally Posted by 04 Rocko Taco View Post

EDIT: I know I know, nitrile gloves and bare feet, only in the south. lol.
I hate to be the one to tell you this, but your gloves......uh, they don't match.

And just to note, "professional" southern men wear nitrile socks.
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Old 07-31-2007, 08:38 AM   #11
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Quote:
Originally Posted by 04 Rocko Taco View Post
Come on, its oh so easy out of the truck... lol.
i know, just yank your motor out of there, and we'll tear into it when i come up...

Click the image to open in full size. Click the image to open in full size.

EDIT: I know I know, nitrile gloves and bare feet, only in the south. lol.
I was gonna say, whenever I see peeps wearing exam gloves,

Run Forest Run!
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Old 07-31-2007, 10:39 AM   #12
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I just used the Ultra Copper Permatex on my header that was leaking like you wouldn't believe. So far it has been 2 weeks and all is quiet. I put a layer on the head, then gasket (toyota), another layer and finally the header. I also used it on the 3 EGR tube connections.
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I'd experience an O so big it'd show up on the richter scale.

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Old 07-31-2007, 03:43 PM   #13
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Sweet! Well I'll try that stuff then!


Dude, Chris, what are you doing in MY driveway dressed like THAT? And isn't that one of MY engines?!
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Old 07-31-2007, 03:43 PM
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