Lifter Wear

[danfr]

Hey all, What do you guys think of this lifter wear? Is this okay to polish out and run?

I have the cases apart and the crank is being machines to .010. I figure I may as well address the cam and lifters while I’m at if.

Cheers

 

[concours]

Mine looked just like that.
I carefully stoned the highs off the lifters, and polished with crocus cloth the bores.
Ran beautifully 34,000 miles. Still fine when I inspected them.

So, yes.

 

[marshg246]

Hey all, What do you guys think of this lifter wear? Is this okay to polish out and run?

I have the cases apart and the crank is being machines to .010. I figure I may as well address the cam and lifters while I’m at if.

Cheers

Like concours, said, polish and run them.

Make sure they go back in the original holes. Try to just take any highs off - you don't want to removed metal other than highs. Make sure to wash in hot soapy water, dry and then oil. I dry/get the water out with WD40, and then oil or assembly lube to put them back together.

 

[danfr]

Like concours, said, polish and run them.

Make sure they go back in the original holes. Try to just take any highs off - you don't want to removed metal other than highs. Make sure to wash in hot soapy water, dry and then oil. I dry/get the water out with WD40, and then oil or assembly lube to put them back together.

Thanks for the replies.

I did try polishing one a little bit and I think I should be able to run them fine with a little more time into them.. The lifters are all mixed up at this point so I may buy a flex hone and clean out the bores a bit.

 

[marshg246]

Thanks for the replies.

I did try polishing one a little bit and I think I should be able to run them fine with a little more time into them.. The lifters are all mixed up at this point so I may buy a flex hone and clean out the bores a bit.

If you look carefully at the mating surfaces you should be able to at least tell which are pairs.

 

[concours]

Thanks for the replies.

I did try polishing one a little bit and I think I should be able to run them fine with a little more time into them.. The lifters are all mixed up at this point so I may buy a flex hone and clean out the bores a bit.

Crocus cloth on a wooden dowel would be a better choice. Just to take off the highs, not remove the scratches. Very minimal.

 

[danfr]

If you look carefully at the mating surfaces you should be able to at least tell which are pairs.

I’ll have a good look. Looks like a good place to stop?

 

[robs ss]

The lifters are all mixed up at this point so I may buy a flex hone and clean out the bores a bit.

At the risk of telling you how to suck eggs - be sure to install all of them with the bevelled edge towards the front. Oil comes down the front onto the backward rotating cam lobes.
Get it wrong and you'll be up for new cam and lifters.
Cheers

 

[Fast Eddie]

I’ll have a good look. Looks like a good place to stop?

It’s how they feel that counts really, not how they look.

As concours said, you’re only wanting to take off the high spots. If you polish too much, and if you’re heavy handed with that hone, you create excess clearance which will lead to excess noise and further wear.

 

[danfr]

At the risk of telling you how to suck eggs - be sure to install all of them with the bevelled edge towards the front. Oil comes down the front onto the backward rotating cam lobes.
Get it wrong and you'll be up for new cam and lifters.
Cheers

Lol ya, that’s how I got to this problem. I installed the lifters backwards. Thankfully I didn’t run the bike for very long. Long enough for this damage. I’ve also had to bore the cylinders up a size. And the Cam is going out for a regrind.

 

[Schwany]

Lol ya, that’s how I got to this problem. I installed the lifters backwards. Thankfully I didn’t run the bike for very long. Long enough for this damage. I’ve also had to bore the cylinders up a size. And the Cam is going out for a regrind.

I thought you were looking at a 2S cam. What did you decide on cam profile wise?

Too bad about the mix up on the lifters.

Don't forget to safety wire the screws that hold the lifter tabs in place. A while back I was about to kick start a new rebuild when I remembered I didn't. Was not a joy filled moment.

 

[ashman]

Should always put the lifters in the right way and place same as putting the pushrods in on the same lifter, a lot has been said about the wear on the lifters themselves but what about wear on the top pads where the cam runs, I be more concern and make sure there are no wear on the top pads or chips on the edge of the pads or any signs of giving way.

 

[danfr]

I thought you were looking at a 2S cam. What did you decide on cam profile wise?

Too bad about the mix up on the lifters.

Don't forget to safety wire the screws that hold the lifter tabs in place. A while back I was about to kick start a new rebuild when I remembered I didn't. Was not a joy filled moment.

Ya I was looking at a 2S cam but I found a shop that can regrind my cam here in Canada.

I’m also planning having my lifters reground. Probably mail it out to Newman’s unless I can find someone locally to reface.

Thanks for the reminder on the tie wire. I have some stainless wire from Walridge.

Cheers

 

[Madnorton]

Lol ya, that’s how I got to this problem. I installed the lifters backwards. Thankfully I didn’t run the bike for very long. Long enough for this damage. I’ve also had to bore the cylinders up a size. And the Cam is going out for a regrind.

The damage to the tappets is not form incorrect installation, but form debris coming down from the head. If you look at the score lines on the tappets you can see how the particle has broken up on its way past the tappet. It starts deep and then thins and shallows away.

 

[Fast Eddie]

The damage to the tappets is not form incorrect installation, but form debris coming down from the head. If you look at the score lines on the tappets you can see how the particle has broken up on its way past the tappet. It starts deep and then thins and shallows away.

I agree and my bike was the same. I think PO had gotten carbon and / or gasket debris down the pushrod tunnels, where it’s impossible to see and retrieve. So it just lay there until it was gradually pulverised into a grinding paste that made its way past the followers !