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How to change manifolds and risers on an OMC V8
I am purchasing a used 1988 boat with OMC V8 FWC engine also 1988 and
would like to start off with brand new manifolds and risers. But I have
not done this before. Has
anyone done the changing themselves, or is this a job best left to the
boatyard/mechanics? Any experiences, positive or negative, doing
this job will be appreciated.
Thanks
Jens-Erik |
Jens_Erik
Mar 16
2006
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| Dissassembly can be a pain depending on how rusted things are. You really
don't want to break off a bolt in the head. If you have time start soaking
things down with wd40 days in advance. "Jens_Erik" <jeck_75@hotmail.com> wrote in message |
James
Mar 17
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| Forget WD-40. Use either PB Blaster or "Hydrogen Peroxide". |
CalifBill
Mar 17
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| Or Aero Kroil. I've met a few expert mechhanics who swear by it. Compared to Kroil, WD-40 just gets in the way. |
Wayne.B
Mar 17
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| >would like to start off with brand new manifolds and risers. But I have |
Netsock
Mar 16
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| It's not a difficult job, but the manifolds are heavy. It's best if you
work with another friend, two is even better, and install the risers
after the manifolds are on the engine, less weight and in some cases it
makes it easier to get at the bolts. If the engine and manifolds are
fresh water cooled you may not need to replace the manifolds, they last
a long time if fresh water cooled, just replaceing the risers should be
good enought. Check the hoses to the risers while your at it, they may
be worn, this might be the best time to do those as well, fresh hoses
are usually more flexable and much easier to get on the risers than the
old ones. Replace the hose clamps on the risers as well, it's best to
use the "T" clamp style on the exhaust hoses, they last forever (not
quite, but close) but make sure you get the right size. John |
Capt
Mar 16
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| Do they really need replacement? Chevy or Ford? If it's a Chevrolet, I would consider looking into
"Stainless Marine" brand stanless exhaust components. Cost a little
more, but weigh a lot less and breathe much better. It's pretty straight forward to do the job - tough part is the weight of
iron manifolds in a confined working space makes them somewhat unwieldy. Rob |
trainfan1
Mar 16
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