wrestling_coach
Contributing Member
Sorry. Just call me a blockhead! LOL. I corrected my post. Thanks3.7 has an Iron head and an aluminum block. Distilled water is the key!
Dennis
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Sorry. Just call me a blockhead! LOL. I corrected my post. Thanks3.7 has an Iron head and an aluminum block. Distilled water is the key!
3.7 has an Iron head and an aluminum block. Distilled water is the key!
Sorry jadilla, meant no harm! Just trying to give you an idea of what you could be up against. I would do a full compression test on any engine before I were to buy it. Just sayin, before you go and dump a wheel barrow of money into the thing. Listen to it run or better yet run the boat it is in if possible. You were asking about the location of the lowest point of the cooling system. That is at the 7:00 position looking at the front of engine and it is as kghost said at the bottom. Make sure when you put the brass plug back in that you start it by hand so as not to strip aluminum threads as kghost suggested. Take your time and you should be ok. That is the best place to drain it because any rust,silt,debris type material floating in the block tends to hang out at the bottom of circulator pump housing and that is where the cam seals are located so I like to keep coolant extra clean and drain every season. In my case, I got the engine out of another boat. I did not pay for it but it was pretty much junk before rebuilding. Number one and four cylinders were locked solid with rust from leaking riser or missing flapper. The exaust water shutter is located on the 1987-89 version 470 exaust pipe, at the top of the last section that connects to the transom. Not sure about the earlier versions but has to be in the exaust somewhere. Hey dockside thanks for the info. on the stator tool. When I reinstalled the stator, I did not have the right tools and was able to get it back on but it was not easy. I was afraid of banging too much with a block of wood because of the aluminum block, seals, etc. I think I had to buy a longer mounting stud to help start pulling as I tapped with the block of wood. Primitive method I guess but it worked. My brother bought a $3500 Snap on puller set with cabinet and all about 6 months later. Who would figure? Ricardo, Mercs original oem equipment on this motor was questionable at best with regard to the known issues. I would love to install an AFR aluminum head on that puppy with scorpion roller rockers and a custom water pipe machine fitted to the front of head for the cooling system. I don't think you can jack up the compression to much because the head bolts go into aluminum threads in an aluminum block. It sure as hell would get rid of the bastardized step child notion with respect to the cast iron head on an aluminum block. I think there were guys using the 470's in some kind of sprint cars and from what I have read were able to get them up to 250 horse. (of course with a bunch of expensive modifications) I think the the compression ratio is 8.8 to 1 on a stock engine. I may just do the aluminum head if things get better with the economy but for now, will run it the way it is! later guys, Tom
does any one know where i can get parts for the 470 motor? new or used i need the front cover for the impeller it's part # 1 Or 15 depends on the drawlings