Pushrod Straightness

[GLFLSTCI02]

I checked my stock non-adjustable pushrods on the surface plate and none of these suckers are straight. I can roll them all and see light coming and going. How much out of true is acceptable on these things before they need replacing? Stock motor with 75000 Kms, I really expected them to be sraighter than this. Ball ends all look good.

Gene

[SP33DY]

If you see daylight under them, they're bent. Once they are the least bit bent they have lost their "column" strength and they're done.

[JSD]

Are you running stock valve springs ?

[GLFLSTCI02]

Yes it is a completely stock motor. I checked the rods again yesterday and a couple of them have witness marks from rubbing the tubes, top and bottom, the ones with the worst marks are the most bent. Looks to be only a few thou of bend in them, some have a couple of bends. In any case I have a set of Smith adjustables on the way, geez could have saved a bunch of work by just cutting them out to start with, oh well I got to have a look at everything up top.

Gene

[FSG]

drill out the PR Tube Tops before you reassemble

[GLFLSTCI02]

drill out the PR Tube Tops before you reassemble

Do I drill out the entire length? How much should I take off? I have a lathe I can use for this.

Gene

[Deye76]

Post # 4

https://harleytechtalk.com/htt/index.php/topic,98592.0.html

[FSG]

You don't need to go all the way through, 1-1/2" at the top is more than enough.

Use a 5/8" (0.625") drill bit, yes it's thin at the top, but there is enough there to support the O-Ring and that's all that's needed.


Ancient => A HTT thread on the PR Tube topic  TC Upper Pushrod Tubes