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Mercrusier water pump follow up post
Thanks to all who gave me some good advice on replacing the impeller
in my Merc water pump. Some previous post's I read said to use some sort of gasket seal when replacing the old gaskets. I asked the service dept. at the shop I use what kind I needed and he said you don't have to use any. Now, I'm confused, I thought gasket seal was always needed when replacing gaskets on anything. Yea, or nay. Thanks, HJJ |
#2
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#3
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Gasket sealer is not necessary. I've been replacing them for over 10 years
without sealer and have had no problems. The top gasket will come with a sealing strip on it, that should be enough. If you do want to use sealer, it won't hurt. I strongly recommend a non-hardening type sealer. Anything that seals permanently will cause a serious headache the next time you try to renew the thing. The biggest thing to be careful with is the installation of the face seal, the rubber seal that goes on top of the housing. Push it on too tight and the seal will come apart from rubbing on the housing. If it is too loose it won't do the job. Both problems can lead to high speed overheating. MercC has a little plastic installer for the seal that sets the height just right. Be sure to use it. wrote in message ... Thanks to all who gave me some good advice on replacing the impeller in my Merc water pump. Some previous post's I read said to use some sort of gasket seal when replacing the old gaskets. I asked the service dept. at the shop I use what kind I needed and he said you don't have to use any. Now, I'm confused, I thought gasket seal was always needed when replacing gaskets on anything. Yea, or nay. Thanks, HJJ |
#4
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I never use any when I replace mine. Just one more thing to clean up next
time. wrote in message ... Thanks to all who gave me some good advice on replacing the impeller in my Merc water pump. Some previous post's I read said to use some sort of gasket seal when replacing the old gaskets. I asked the service dept. at the shop I use what kind I needed and he said you don't have to use any. Now, I'm confused, I thought gasket seal was always needed when replacing gaskets on anything. Yea, or nay. Thanks, HJJ |
#5
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"JamesgangNC" wrote in message link.net...
I never use any when I replace mine. Just one more thing to clean up next time. wrote in message ... Thanks to all who gave me some good advice on replacing the impeller in my Merc water pump. Some previous post's I read said to use some sort of gasket seal when replacing the old gaskets. I asked the service dept. at the shop I use what kind I needed and he said you don't have to use any. Now, I'm confused, I thought gasket seal was always needed when replacing gaskets on anything. Yea, or nay. Thanks, HJJ the gasket goo being referred too is perfect seal. ill only use it too prevent corrosion. newer leg housings with ss water pumps dont like each other and i find perfect seal an excellent corrosion preventer. |
#6
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wrote
I thought gasket seal was always needed when replacing gaskets on anything. Yea, or nay. My Mercruiser service manual doesn't call for any sealer on the water pump gaskets. I've never used any, and one good reason not to is that I replace my impeller fairly regularly and it's nice not to have the gaskets stuck and going to pieces when I pull the housing off. I don't think you need a perfect seal (tm) on the water pump gaskets because all you'd be doing is keeping water from getting into water. Obviously you don't want massive leaks because you want the pumped water to go where it's supposed to, but a little seepage out of the pump is just going to go into the surrounding water there in the exhaust passage. The water pump base has an o-ring around its outside diameter where it plugs into the gear housing and a seal where the shaft goes through, and those are the things that keep the water and gear lube apart. The one place the manual does call for sealer is the metal insert that goes into the pump housing, the thing the impeller rides in, presumably to help keep it from knocking it's little tab off and going for a spin. All this applies to my Type-1 drive with its plastic pump body and oil seal in the base. Yours may be different. |
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