Exhaust Manifold on 3600 Gas

Curt Cooke · Sep 29, 2014

Have a leak at the head. Before I go after it, what's the experience of actually being able to remove bolts? 50/50?

Ultradog MN · Sep 29, 2014

Which bolts?
Head bolts? Manifols bolts?
I've never had any trouble with any of them.

Curt Cooke · Sep 29, 2014

Manifold, bolts that hold manifold to head

Ultradog MN · Sep 29, 2014

Sorry,
I don't know what's up but I'm just not reading these posts carefully enough the last few days.
Anyway, I've never had any trouble removing the manifold bolts on these 3 cylinder engines. I did have one on a vertical 4000 manifold once - they use one long 6" bolt in the middle - that broke off but not in the head. It unscrewed fine once I got the manifold pried away from the head.
You should have no trouble removing them.

RickB · Sep 29, 2014

Exhaust manifold bolts are generally a lot less problematic than expected. Please not your mileage may vary. A lot.

sotxbill · Sep 29, 2014

use a good six sided socket to remove them.

Sean in PA · Sep 29, 2014

When I replaced the exhaust manifold on my 3 cylinder 4000, the manifold was rusted clean through on the bottom and the bolt heads were rusted all to heck, so I sprayed them a few times a day with PB Blast for several days before I tried to remove any of the bolts, and when I finally tried they came out so easy I wondered why I bothered with the PB Blast ritual in the first place. The threads on the bolts and in the manifold were clean and rust free. Use all new bolts to put the new manifold on. Don't forget new lock washers too.

RodinNS · Sep 29, 2014

Usually they don't give any fight. Usually....
Just use some common sense and a bit of caution. They should come right out.

Rod

Exhaust Manifold on 3600 Gas

Curt Cooke

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Ultradog MN

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Curt Cooke

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Ultradog MN

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RickB

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sotxbill

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Sean in PA

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RodinNS

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