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I have a customer who has all sorts of weird cars and one of them is a 1960 Mercury Monterey with a 312 engine. The car is totally original and when he bought it from the original owner last fall everything worked for the most part and the engine sounded and ran great.

Now he's had problems, the cam has gone flat question is, if he pulls the engine, flips it upside down on the engine stand is it possible to put in new lifters without removing the crank, rods, pistons? I'm not that familiar with the 292 or 312 to know for sure except for that it has mushroom tappets that come out from the bottom not the top. When I told him that he was surprised as was his buddy who had been telling him it would be easy to change the cam.
 

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Dave, there is no need to pull the engine or flip it, providing you have enough room to pull the cam (remove radiator, etc.). Remove rockers, pushrods, intake, valley pan, front cover and distributor. Use magnet to pull lifters all the way up, secure them with 16 spring type clothes pins. Remove timing set, thrust plate and cam. Now the fun begins. Find a mailing tube or PVC pipe that will fit through the cam bearings...as large in diameter as possible and a few inches longer than the cam. Cut tube in half LENGTHWISE and insert in cam bores to catch lifters as you remove clothes pins one by one. Fish lifters from tube with magnet. LEAVE THE TUBE IN. Using a 2 or 3 finger parts grabber install lifters with the aid of magnet, start at rear of engine and work forward, securing each with clothes pin as you go. It's a pain but I've done it twice, "back when". Worst case...you drop a lifter inside and have to pull the pan. At this point, all that's left is to re-install everything. It's time consuming and awkward but may be preferable to pulling the crank.
NOTES: If you must drop the crank, there are Viton rear seals available. The timing marks go to the side, chain should have 2 marked links which straddle the marks. HAVE FUN. :roll:
 

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Yuck! This engine also has a fair amount of sludge so that'll make it even more fun. It's those guys who are doing the work not me thank goodness:^). I think they show that method in the Cummins diesel shop manual thanks for the tip.
 

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Dave if my memory serves me correct you do have to pull the engine and turn it upside down to pull the cam then you can pull the lifters and replace the lifters and install the new cam them you may turn it right side up.


Randy


and before you guy's get in a tizzy the reason is that engine has mushroom lifters or at least mine did. and the only way to remove them is to turn it over and slip all the lifters away from the cam and then you can remove the cam...
 

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Speaking as a Y block owner....Chuck hit it on the head. No need to pull it, no need to flip it...just takes a while. His procedure is spot on...and, as mentioned, the timing marks do NOT line up. They are 12 pins apart.

Some Argentinian/Brazilian Ys have hydraulic lifters....the Y was used down there until at least the late '70s!
 
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