Conrod endplay

Stanley I guess the reward is in the doing of it

4,523 posts · joined Mar 2003 · 19 Jul 2003, 3:35 pm

#66922

How much endplay is to much. I have spent a couple of hours balancing rods and pistons till there all perfect. Now i've checked the little end bearings again and i'm not sure. You can't feel any slop push pull but there is a tiny amount of pistin tilt.🙁

KruizinKombi Seriously Obsessed Cyber Dubber

3,493 posts · joined Aug 2002 · 19 Jul 2003, 6:18 pm

#66957

I'm assuming that you're asking about a 69 Bug?

The Gregory's workshop manual for Beetles up to 71 lists the 'Gudgeon pin to bush clearance' as .0002" +.0005" -.0000" for 1100, 1200, 1200A and 1300-1500 engine sizes. 🙂

Kruizin Kol

KruizinKombi Seriously Obsessed Cyber Dubber

3,493 posts · joined Aug 2002 · 19 Jul 2003, 7:20 pm

#66982

From the Gregorys:

Depending on the amount of permissible tolerance discrepancy between gudgeon pin and bearing, the pun may be found to be a light finger-push fit in the piston without any heating of the piston. The condition is quite normal, even when the gudgeion pin should happen to slide out of the piston under its own weight. There is no reason whatsoever to replace the pin, piston or both in these conditions.

Oversize gudgeon pins (marked green) are available for cases where the bearing limits are exceeded. The practice of heating the piston is permissible in all cases where no light finger-push fit of the pin is obtained with the piston cold.

The clearance between the gudgeon pin and connecting rod bush is .0001" to .0006". If the clearance is near the wear limit of .0016", renew the pin and the connecting rod bush. No oversize gudgeon pin should be fitted in this case.

The correct clearance will be indicated by a light finger-push fit with the pin oiled after the piston has been heated to 176 (degrees) F.

Ben, please tell me which part of this information is incorrect or inadequate. Also, where does it tell me how to get to Nambucca?

Kruizin Kol

Stanley I guess the reward is in the doing of it

4,523 posts · joined Mar 2003 · 20 Jul 2003, 7:33 am

#67064

Thanks guy's. The gudgeons fall through the conrod under their own weight quite easily (dry) gudgeon to piston is good . How do you go about replacing small end bearings. Don't they have to bee reamed after installation . Sounds expensive for what there worth.

Stanley I guess the reward is in the doing of it

4,523 posts · joined Mar 2003 · 21 Jul 2003, 6:19 am

#67261

Pin to rod bush is correct. i think it's right on the limit but I might "suck it and see" 😀