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    Mercruiser 470 Cam Seals 1985 Sea Ray Monaco 185

    My chain tensioner was worn pretty bad so I replaced it with a less worn one I found on eBay. The timing chain and gears seemed other were in good shape. The exposed oil pan gasket was fairly intact and there was no gasket material on the timing cover, so I was more fortunate than others as far...
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    Mercruiser 470 Cam Seals 1985 Sea Ray Monaco 185

    As far as the camshaft is concerned, I found the same deep groove under the front water seal as others have documented, and similar light groove where the rear water seal rode. I used a micrometer to measure the camshaft and came up with .873 and some change as have others, the low end of the...
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    Mercruiser 470 Cam Seals 1985 Sea Ray Monaco 185

    I used a hammer and punch to remove the water seals and a hammer and PVC coupling to remove the front (oil) seal. I used a hammer and a device that was just slightly less than the diameter of the water seal cavity to install the water seals. I could not find a PVC piece close enough to the...
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    Mercruiser 470 Cam Seals 1985 Sea Ray Monaco 185

    I’m going to try to capture all of the concerns pressing the seals in and out I came across in the various threads on this forum, that way there in one place. The timing cover has a lip on the back where the rear water seal seats. So the water seals can only be pressed or punched out one way...
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    Mercruiser 470 Cam Seals 1985 Sea Ray Monaco 185

    I removed the timing cover and took a picture of the position of the cam seals. I wanted to duplicate this, particularly the front seal, when I installed the new seals so I could be certain they would be positioned over the speedy sleeve. My front seal is located at the base of the chamfer in...
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    Mercruiser 470 Cam Seals 1985 Sea Ray Monaco 185

    I removed seven screws from the oil pan gasket, three go into the the timing cover and I removed two on either side to try to make separating the oil pan gasket from the timing cover easier. I don’t think it helped much. I worked the razor blade between the timing cover and oil pan gasket as...
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    Mercruiser 470 Cam Seals 1985 Sea Ray Monaco 185

    I had no issues removing the stator Allen screw s. I have an alternator, so I simply set the stator aside and did not reinstall it. My impeller was also easy to remove, I heated it first to break any locktite that might have been there and it came right off. My water pump cover came off in two...
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    Mercruiser 470 Cam Seals 1985 Sea Ray Monaco 185

    Like others doing this repair I struggled with how much room I would need to pull the harmonic balancer forward even after I raised the center of the crankshaft high enough to get the puller on. As it turns out, the harmonic balancer only moves 2 1/4” forward before it clears the crankshaft, so...
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    Mercruiser 470 Cam Seals 1985 Sea Ray Monaco 185

    Before I started this project I noticed all of the available information addressed raising the engine with a hoist if the center of the crankshaft was below the deck. A hoist isn’t necessary if you can raise the motor high enough using the alignment adjusting stud. You first must remove the...
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    Mercruiser 470 Cam Seals 1985 Sea Ray Monaco 185

    This thread is an update of numerous threads, some more than ten years old with a wealth of information on replacing the cam seals in the veritable 470 engine, some of which may still be around. I added a little of my own insight and experience, but I owe a debt of thanks to all those posters...
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    470 Operators

    I’ve just finished replacing the cam seals on my 470. The project went fairly well using threads from this forum and the stern drive.com thread. I do have some additional insights though, I’d be happy to post my notes and pictures if anyone is interested. I know the 470 is getting pretty dated...
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    Oil Leak

    Did you replace the front seal on the timing cover after you pulled it?
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