Checking Endplay

[legotech7]

I have a motor that I want to rebuild. The PO said it was built to a 1641. I started to take it apart, Then I thought I should check the endplay. From the fly wheel, I tried to move it back and forth. It wouldn't budge. One way or the other. looking into it further, took the fly wheel off and found that there were only two shims behind the crank and the were both .001 of an inch, to a total of 2 thousands. Are there supposed to be 3 shims? With end result being from 3 to 4 thousands to be an acceptable range? If its to tight, could that be a problem? It turns ok when I turn on the pully clock wise. To those in the know, Why is the endplay so tight? Thanks all

[halfassleatherworks]

Put the flywheel back on and take a reading. then make up a shim pack with three shims, your reading minus .004 for pack total. if your gage is reading right you have .023 thou, 23 thou not 2. thou is the 3 digit. . tenth, hundredth, thousandth,

[legotech7]

Thank you halfassleatherworks will take heath. But isn't it supposed move, even a few thousands?....If its too tight, could that be a problem?... Perhaps a bearing issue, or the crank?.......

[halfassleatherworks]

your 2 shims at .023 are to thick, as I said remove all shims put the flywheel on and check, if you don't have any play with shims out you have a problem.

[legotech7]

halfassleatherworks.. I'll check, but I believe this might an issue. So if that is the case, what kind of problems will I run into?

[oprn]

The number of shims is immaterial (one shim, five shims)as long as the end play is correct when you are done. A combination of three shims just happens to work out in most cases due to the thicknesses they come in.
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[legotech7]

W ill post on my findings, a soon as I'm able. Thank you all for your responses....

[tpinthepack]

I was taught years ago to install 2 shims at first without the flywheel seal, take the measurement, then use math to determine the size of the 3rd shim needed. I have a good supply of shims on hand and never have an issue getting this correct. I agree 1 or 2 does not matter, but the method that I use makes is very simple. I use a magnetic dial indicator, and a standard micrometer on the shim not the Vernier caliper, but it should be fine.
Good luck.
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[legotech7]

tpinthepack... Thanks. Its taking a bit to get in the garage to work on my engine . I 've read on some of the forums, and they insist you need the three shims. once again I will post my findings, and hope all this information will help others as well...

[legotech7]

Having a hard time posting pictures. I set the dial indicator to where I thought it should be. Up against the fly wheel. No shims. Moving the fly wheel back and forth with assist of two large screw drivers, gently moving them of course. It just barely moved perhaps 0.001 either way... I might be doing something wrong as to where I positioned the dial indicator. Don't know .Do I need to add shims?.... Please advise,and thanks...

[Dale M.]

[oprn]

[legotech7]

Thanks Dale for the video. Sometimes I have to sit back clear my mind and finally things come into perspective. I moved the dial up against the body of the case. Then it all fell into place. 0.030 minus 4 = correct? Now to get some more shims. I understand they are had to come by.. More searching!!!!!!

[Dale M.]

[legotech7]

[legotech7]

OK... Got done with the endplay. Quite an experience...Love this stuff...Anyway, this engine has these heads with the scat rocker arms. I don't know what size valves are in them. The PO said that the engine was built to 1641. Might the heads still be stock, but they only added the rocker arms, and will that hurt anything in the mostly stock engine? They did say that it had some chatter from the right side head. Perhaps they are loose?. I haven't delt into them yet, thought I'd get some more opinions from the group...Again thanks in advance...

[EVfun]

[Dale M.]

Actually in very first pic there is a "O" ring in flywheel....
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All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...

[legotech7]

In the pictures where you see the seal , was only placed there so I wouldn't loose it. It is not pressed in all the way and the metal gasket placed to the side. The other pic,I was trying to measure the shims. I managed to set the end play within its tolerances after making sure I set up my dial indicator correctly, with the help of many of you here. Three shims set at 4 thousands of an inch. Torques at 260 lbs , using a torque multiplier...Don't know if I trust that aparatus....But I hope it good .......

[Abscate]

Correcting above. Three shims is important, not just the end play. You need oil and three shims to control the wear of the flywheel against the case boss.
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