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#1
posted to rec.boats
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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 |
#2
posted to rec.boats
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How to change manifolds and risers on an OMC V8
On 16 Mar 2006 07:31:39 -0800, "Jens_Erik"
wrote: 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 Depends on you mechanical ability, but I would consider this job "semi-easy" on the scale. Disassembly is a breeze. Simply... 1. Remove the exhaust rubber "pipes". 2. Remove rubber water inlet hoses. 3. Remove risers from the manifolds. 4. Remove manifolds from block. Assembly is where some care is needed. You didn't say why you were doing this, but if the parts are new, you need not worry much. (if you were replacing the same, or used units, you MUST verify warpage with a straight edge). Just make sure all surfaces are clean and free of any oil and debris, make sure all gaskets line up correctly, and since it appears this is work you don't normally do, I would recommend a torque wrench to ensure proper tightening. Reverse procedure above for assembly. Good luck. __ "It's just about going fast...that's all..." http://home.columbus.rr.com/ckg/ |
#3
posted to rec.boats
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How to change manifolds and risers on an OMC V8
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 |
#4
posted to rec.boats
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How to change manifolds and risers on an OMC V8
Jens_Erik wrote:
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 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 |
#5
posted to rec.boats
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How to change manifolds and risers on an OMC V8
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" wrote in message oups.com... 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 |
#6
posted to rec.boats
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How to change manifolds and risers on an OMC V8
"James" wrote in message link.net... 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" wrote in message oups.com... 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 Forget WD-40. Use either PB Blaster or "Hydrogen Peroxide". |
#7
posted to rec.boats
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How to change manifolds and risers on an OMC V8
On Fri, 17 Mar 2006 18:03:37 GMT, "CalifBill"
wrote: Forget WD-40. Use either PB Blaster or "Hydrogen Peroxide". Or Aero Kroil. I've met a few expert mechhanics who swear by it. Compared to Kroil, WD-40 just gets in the way. |
#8
posted to rec.boats
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How to change manifolds and risers on an OMC V8
On Fri, 17 Mar 2006 16:07:48 -0500, Wayne.B wrote:
Or Aero Kroil. I've met a few expert mechhanics who swear by it. And some non-expert mechanics. ;-) I don't think it's sold retail, though. So: http://www.kanolabs.com/ |
#9
posted to rec.boats
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How to change manifolds and risers on an OMC V8
Thanks for all your replies.
The parts are new and genuine OMC parts. I am doing this as a preventive/maintenance percussion. It sounds like there is not much to it and I will get a couple of friends to help me. They have some experience in the area as they have had boats for years. What about flushing kits, What are your experiences as to how the easiest way to flush with after use? Jens-Erik |
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