Exhaust Manifold - FordTough.ca - Home of Canadian Ford Truck Enthusiasts
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post #1 of 13 (permalink) Old 03-13-2012, 10:00 PM Thread Starter
 
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Exhaust Manifold

anybody have any idea how many bolts there are holding the passenger side exhaust manifold onto a 91 302, and their placement?
Haynes manual says nothing although it says also that there is no gasket on the manifold just a heat sealant of some sort. Is this possible? This really burns my ass, I know those bolts are gonna break, maybe I should lube them a couple of days in a row?
I wondring if I could get away with trying to squeeze some sealer in there. Leaking on the top.
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post #2 of 13 (permalink) Old 03-14-2012, 09:01 PM
 
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There's 8 bolts. Use heat to help them come out easier



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post #3 of 13 (permalink) Old 03-14-2012, 09:44 PM
 
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If you can get a torch in there with out burning everything heat up the manifold so the bolts will turn easier.

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2010 F150 Supercrew 4X4
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post #4 of 13 (permalink) Old 03-14-2012, 11:15 PM Thread Starter
 
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k cool thanks
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post #5 of 13 (permalink) Old 03-15-2012, 01:33 AM
 
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from my experience....................you may as well just torch the heads off and extract the studs after the manifold is off.
and yes there are 8, if you can find the heads of them.

this way you can attach a stud remover right against the cylinder head, less likely to snap off the stud.

310T and 310S for 20yrs in Nov.

cheers

forgot 1 thing: if you own an air chisel, hammer away on the heads of the bolts before you even get the torch out. this method has worked for me before using the torches, I was actually surprized when it worked. it was on a 93 5.8 EFI in a plow truck, without much head left on the bolts even.

good luck
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post #6 of 13 (permalink) Old 03-15-2012, 01:44 AM
 
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when you get the manifold off, send it to your local machine shop and get it resurfaced. after you clean the head surface, use copper(high heat) silicone clean out the bolt holes and bolt that sucker on w/new hardware.
Ford didn't use any gasket when new, and look how long it worked!!!!!!!!!

exhaust manifold gaskets are used to fix mistakes and they don't last
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post #7 of 13 (permalink) Old 03-15-2012, 10:12 PM
 
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Graphite grease makes a good sealant for exhaust manifolds. High grade stainless steel bolts are a good replacement for the original studs and bolts along with a little lock-tite or lock washers made from high grade stainless.

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post #8 of 13 (permalink) Old 03-17-2012, 12:24 PM
 
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Just looking at rock auto you can get them if you want em.
http://www.rockauto.com/catalog/x,ca...,parttype,5400

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post #9 of 13 (permalink) Old 03-25-2012, 08:08 PM Thread Starter
 
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Well I tackled this today, there was once a gasket in there but it was 99% gone, I ended up removing the entire manifold where it mates to the exhaust.
Only had 1 bolt break in the head and was able to get it out with a torch and vice grips. I installed the new gasket and applied copper sealer on both sides and torqued everything down.
Let it dry for 2 hours and now its worse.
The kit I got was the Fel-Pro kit but the donut nor the flange gasket fit my truck so I'm guessing they gave me the wrong kit. I'm hoping its the wrong kit and its leaking from the flange.
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post #10 of 13 (permalink) Old 03-25-2012, 08:23 PM
 
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If the flange and donut doesn't seat right it will leak like a bitch, when it's running at first start up run your hand around the flange to see if thats where the leak is.

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