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Another pilot bearing question

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POLLYMARKA Avatar
POLLYMARKA MARK ALLEN
San Marcos, TX, USA   USA
Rebuilding a '70 1275. I am installing the Rivergate adapter system. No issues until I tried the pilot bearings.

The kit comes with 2 sizes. The smallest is obviously too small.

The larger one has 2 steps on the O.D.. The smaller step is about .09" larger than the lower step in the crank hole. The larger step in the pilot bushing is about .04" smaller than the upper step in the crank.

The height of the upper step in the pilot bearing would put the installed height (once the suspected remaining old bushing is removed) .23" below the surface of the crank.

The crank hole looks so grooved I can't tell if old pilot bushing remains.

1. Is the difference of .04" in the wider hole over the bushing acceptable?

2. Is it ok if the pilot bearing is recessed .23" ?

3. Do the pictures look like there is some old pilot bushing left? Nothing left looks like brass.

Photos attached.



Mench tracht un MG Gott lacht!
(We plan and the MG God laughs!)

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mantwillys Avatar
mantwillys skip m.
wadsworth, NV, USA   USA
mark,
it appears that part of old bearing is still in the pocket. i have seen caged needle bearings and brass bushing in 1275

skip



if you are are not happy,you are doing the wrong thing. sooo.....??

anagy66 Avatar
anagy66 Al Nagy
Lititz, PA, USA   USA
Mark,

Just an FYI: My 1973 Midget 1275 cc had a caged needle bearing pilot bushing.

Al

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POLLYMARKA Avatar
POLLYMARKA MARK ALLEN
San Marcos, TX, USA   USA
That is what I was thinking but all the concentric grooves along the top of the ledge had me wondering if I was correct.

Any input about the clearance 0f .04" around the upper portion and the potential .13 -.23 recess when the bushing is finally installed?



Mench tracht un MG Gott lacht!
(We plan and the MG God laughs!)

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