no end play?

[alextrox69]

im building my first vw engine....1835cc forged crank stock rods
120 cam

20 over.

engine spins freely but has no endplay.

is this normal? all parts are new exept the rods. what do i do if theres no endplay?

[alextrox69]

[Sigurd]

You are checking endplay with just the crank and bearings? Take the camshaft out too. You should be getting A LOT of play with no flywheel and 0.040-0.050" with the flywheel.

[alextrox69]

[Sigurd]

It doesn't. I didn't say that very clearly. You will have less endplay with the flywheel on than with the flywheel off. It will be 0.040-0.050" WITH the flywheel, but much greater than that WITHOUT the flywheel. I think I had 1/8" with the flywheel off. Are you sure something isn't interfering and that the bearings all seated in the journals fully?

[alextrox69]

[alextrox69]

any ideas anyone? i tried searhing couldnt find an answer...

[edmond]

Check that the counterweights on the crank are not interfering with the case main bearing webs, its a common problem and this will cause the no endplay problem

[Chad M]

Make sure the radius on the main bearing journal isn't too long and riding into the chamfer on the backside of the bearing. If the radius is too long, it can act like a wedge into that bearing. I've not witnessed it, but I've certainly read about problems with machining on new cranks. The cure seems to be to make the chamfer on backside of the #1 (flywheel) bearing deeper to clear the radius.

edit: and pull that distributor back out before you re-measure.

[alextrox69]

Thanks ill be looking into the case this coming weekend

[rodgersbadassbus64]

What crank do you have i bet it is hitting the center web if it is an aftermarket scat cw! If so you need to have the case clearenced or put in another crank. Keep us posted!

[Geezer]

Before the flywheel is installed .030" end play. Install the flywheel no end play. I wonder if the counterbore in the flywheel is to deep? I didn't think about the counter weights on the crankshaft. Wendt together easy and still spins with the flywheel installed and 0 end play.

[66brm]

Do you have any shims installed? or is the measurment with the flywheel against the thrust bearing?
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[W1K1]

[chrisflstf]

How are you measuring end play? .004" is not much movement

[Geezer]

My crankshaft was a modified German counterweighted 69 mm crankshaft. There is a slight difference between years in the cranks. The dowel pin end has a slight difference in diameters in the area of the O ring seals on the flywheel maybe .010". I went to Brother's VW Machine shop and they suggested I try a modified flywheel that has the O ring groove bored out. The depth of the counter bore where the end of the crankshaft and the flywheel meet is a standard .375". I measured a few flywheels and they were all the same. I installed the modified flywheel on my engine and with no shims got .030" of end play with the crankshaft pulley installed. I installed (2) .010" shims and got .014" end play. I installed (3) .010" shims and have .004" end play after torquing to 225 foot pounds. Brothers say this is to tight for the end play and it should be .005" end play. Brothers will bore my flywheel to where it will still have the O ring seal and I will have .005" end play. They are going to remove .001" to get the correct end play with a stack of .030" shims. If this had not worked I would have had to disassemble the engine to see if the counter weights were rubbing the bearing supports. Eeek. Hope this helps someone else.