Are these Tappets/Cam followers any good?

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Micha
Posts: 427
Joined: Fri Oct 12, 2007 2:24 am
Location: Israel

Are these Tappets/Cam followers any good?

Post by Micha »

Can you please tell me if I can reuse these?


I always read and hear how important it is for this part to have a clean, smooth surface and the truth is I didn't understand why: If the center is flat, where the pushing is taking place - what do we care about the rest of the surface?

Another question is about the tappet guide bushings: How do I know that they are not worn and have gone beyond measure? The tappets sit inside well without play when lubricated.
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Michael Steinmann
R51/3 1952
Engine Nr. 529466

MikeL46
Posts: 120
Joined: Fri Jan 01, 2016 1:58 pm

The contact is not just in

Post by MikeL46 »

The contact is not just in the center; contact is off-center. The off-center contact causes the follower to rotate (notice the circular pattern?) so the entire surface is in use.

I wouldn't use C in my enemies engine. I wouldn't use any of them in my engine. If I could afford it I would throw them all away.

Mike
67 R50/2 w/R100 engine/trans and Ural Sidecar
69 R60/2 76 R90S 78 R100RS
70 Triumph w/Spirit Eagle Sidecar

Captonzap
Posts: 87
Joined: Thu Aug 21, 2014 10:24 pm

And take a good look at the cam lobes

Post by Captonzap »

They can't be in much better shape.

CZ

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Micha
Posts: 427
Joined: Fri Oct 12, 2007 2:24 am
Location: Israel

Thanks for this tip, CZ. I

Post by Micha »

Thanks for this tip, CZ.
I will send the shaft for a rebuild.
Michael Steinmann
R51/3 1952
Engine Nr. 529466

User avatar
Micha
Posts: 427
Joined: Fri Oct 12, 2007 2:24 am
Location: Israel

yep

Post by Micha »

The contact is not just in the center; contact is off-center. The off-center contact causes the follower to rotate (notice the circular pattern?) so the entire surface is in use.

I wouldn't use C in my enemies engine. I wouldn't use any of them in my engine. If I could afford it I would throw them all away.

Mike


Thanks - I will.
Michael Steinmann
R51/3 1952
Engine Nr. 529466

ahistand
Posts: 22
Joined: Mon Oct 16, 2006 10:04 pm

Worn cam followers

Post by ahistand »

Michael I would not re-use any of those. They all have some degree of pitting and at least one has been chipped around the edge. Also, they are the old style “4 window” type which are weaker than the newer style “2 window” type. Since your lifters are in bad shape I would also carefully inspect your camshaft to see if it also needs replacement. New lifters are not terribly expensive. The lifter sleeves or bores in the case rarely wear out and if they are you would see obvious wear on both the ID of the bores and on the OD of the lifters.

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Micha
Posts: 427
Joined: Fri Oct 12, 2007 2:24 am
Location: Israel

Thanks ahistand. You make an

Post by Micha »

Thanks ahistand.
You make an interesting point here.
I saw that these followers can be purchased in oversizes, but when oiling the old ones and inserting them, I can not feel any play in those sleeves or bores.
So I think I will order the STD size.
Michael Steinmann
R51/3 1952
Engine Nr. 529466

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