Replacing the flywheel, endplay?

[joebennettPA]

While I did a quick clean up while the motor is out, I decided the flywheel was in real bad shape. So I picked up a never used old new one. I was told I need to reset the end play, but I already filled it with oil, and replaced the main seal, both of wich would need to be removed. The question, do I really need to reset endplay? this is an older motor,, po said it has about 10k on it. The reason I ask, is I have know idea how to do check it..... thanks
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75 "La Grande" super <10k miles, ac,sport shifter,sport steering wheel,sunroof, chrome sport wheels, Viper Green, All original factory/Dealer options! (sold)
73 super, ON THE ROAD!! 14month rehab!
1982 rabbit caddy!

[Tim Donahoe]

Grab the back--upper lip--of the flywheel. Actually, get behind the flywheel and place your thumbs under the lip of the flywhee and your fingers over the top of the engine case. Squeeze your hands together to try to get the flywheel to move up and in--mostly up. If it moves--not at all (with a lot of pressure from your hands and several tries), or the tiniest fraction, then you're probably okay.

If, however, you can get it to move, like a sixteenth inch up or more, then you'd better get a dial indicator on it to measure the correct way.

You NEED the proper amount of shims installed between the flywheel and the crank to get no more than three or four thousandths on the dial indicator scale. If it's more, you'll ruin the crank.

Tim

[ashman40]

I don't believe you need to remove the oil or the main seal to check the end-play. If you do need to change the shims to adjust the end-play, you will need to remove the main seal.

Just to put it into perspective.... the target crank end-play is 0.003~0.005" with a wear limit (max) of 0.006". Most Americans are familiar with how small 1/16" is. Well 1/16" works out to 0.0625". That is 20x as much play as you want! If you can feel the crank moving as you push/pull on the flywheel... that is too much play.
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AshMan40
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'67 Beetle #1 {project car that never made it to the road }
'75 Beetle 1200LS (RHD Japan model) {junked due to frame rot}
'67 Beetle #2 {2019 project car - Wish me luck!}

[mrbigmax]

Here's a good post about checking about checking the endplay.
http://www.thesamba.com/vw/forum/viewtopic.php?t=440184&postdays=0&postorder=asc&start=0

[Max Welton]

[Tim Donahoe]

So then you need 1 to 5 mm of play so it's not too tight, right?

Tim

[wayne1230cars]

The desired clearance of .003 - .005 refers to "thousandths" of one inch. For example if you had a sheet of paper that was .005 thick, then you would need 200 sheets of paper just to equal one inch. The point being that it is a very small amount as ashman referenced in his post.

.003 converts to .0762 mm., much, much less than 1 mm. The decimal point becomes real important in these numbers.

Just think of what .006 feels like when you adjust valves. End play clearance is less than that.

I have seen engines run OK with a whole lot more end play than .003 - .005. For sure you don't want end play to be too little after a rebuild. Otherwise you could be repeating the rebuild process real soon.
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