Roller lifters
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Roller lifters
When rebuilding roller lifters and replacing the needle bearings with bushings how much oil clearance should there be between the axle and the bushings? Would .003-.005 be sufficient or should I give it some extra since it’s not pressure fed.
curiousgeorge- Posts : 191
Join date : 2008-12-03
Age : 41
Re: Roller lifters
curiousgeorge wrote:When rebuilding roller lifters and replacing the needle bearings with bushings how much oil clearance should there be between the axle and the bushings? Would .003-.005 be sufficient or should I give it some extra since it’s not pressure fed.
Curt- Posts : 2791
Join date : 2009-02-08
Age : 62
Location : Henrietta, Texas but mostly on the road
Re: Roller lifters
I don't know that I would go any more than that. You want the bushing to take the least amount of pounding as possible.
BBFTorino- Posts : 999
Join date : 2015-12-31
curiousgeorge likes this post
Re: Roller lifters
Interesting. This article mentioned ".003" before flags go up" and .0015" with needle bearings.
https://www.enginelabs.com/engine-tech/engine/isky-cams-takes-mystery-out-of-bushing-style-roller-lifters/
Don't you need the HIPPO oil feed with the bushing to make them lubricate?
https://www.enginelabs.com/engine-tech/engine/isky-cams-takes-mystery-out-of-bushing-style-roller-lifters/
Don't you need the HIPPO oil feed with the bushing to make them lubricate?
supervel45- Posts : 4502
Join date : 2013-09-04
curiousgeorge likes this post
Re: Roller lifters
George, Isky was keeping the initial clearance secrete in the article and also mentioned some kind of "special break in fluid" that they use to assemble them. Looks like the .003" is how much the clearance can grow after use until they are almost worn out.
I just wanted to clear that up, from my initial post.
I just wanted to clear that up, from my initial post.
supervel45- Posts : 4502
Join date : 2013-09-04
Re: Roller lifters
supervel45 wrote:George, Isky was keeping the initial clearance secrete in the article and also mentioned some kind of "special break in fluid" that they use to assemble them. Looks like the .003" is how much the clearance can grow after use until they are almost worn out.
I just wanted to clear that up, from my initial post.
Yes I’ve only had a chance to read part of that article but it also states the were using a proprietary material. I have found some high load oil impregnated bronze bushings that fit the roller and new tool steel shaft for the axle but the bushings will have to be reamed/honed to fit the axle and I can set the clearance then. A lot of them I see have drilled an oil passage through the lifter body so it will just spray oil on the axle. I think a few have tried to get pressure fed into the axle to try and float the bushing.
I will most likely put this set together and test them in my engine since I don’t have access to the equipment to test them. I would like to start doing this on the side but I’m trying to get everything figured out first.
curiousgeorge- Posts : 191
Join date : 2008-12-03
Age : 41
Re: Roller lifters
I use the smaller size pin gauge set on carburetors. I don't know how big your roller pin is but this may help you sizing them, or next size set.
https://www.ebay.com/itm/350727698242
The DLC stuff bushings seem to be the best if you can get them now or afford them.
https://racemaxdirect.com.au/product/bam-roller-lifters-ford-w-c-bbf-874-pro-plus-bb1-bushed-centre-p-rod-b-2010-16bb1/
Hopefully you can make yours work out.
https://www.ebay.com/itm/350727698242
The DLC stuff bushings seem to be the best if you can get them now or afford them.
https://racemaxdirect.com.au/product/bam-roller-lifters-ford-w-c-bbf-874-pro-plus-bb1-bushed-centre-p-rod-b-2010-16bb1/
Hopefully you can make yours work out.
supervel45- Posts : 4502
Join date : 2013-09-04
Re: Roller lifters
That sucks, the price doubles/triples. This looks like it has all the sizes left you are after.
https://www.ebay.com/itm/233748449117?hash=item366c7e475d:g:aCgAAOSwmY9fijbT&amdata=enc%3AAQAHAAAAoMtqPIG%2FAvrkVycypnJT6Ip5NAu3QTqDDQ6cNfWCEOey0YqQAN146dvmlMMTU6Kzvq5KDVxPtHVIeJbVusC75t5vom2nKkNd6yYKG4sjfAesLmGrkr9YnsM8UAag7XmS5P0XG8u%2Bgx%2FZ%2FxFNh5OF3Lm3ad5bMd%2FA0rcmOoD9H%2F4AqB51duljU22iRycBxc5LAjXkUR%2FEujEKqhWyXtSiTmg%3D%7Ctkp%3ABk9SR4qZ8fzVYQ
https://www.ebay.com/itm/233748449117?hash=item366c7e475d:g:aCgAAOSwmY9fijbT&amdata=enc%3AAQAHAAAAoMtqPIG%2FAvrkVycypnJT6Ip5NAu3QTqDDQ6cNfWCEOey0YqQAN146dvmlMMTU6Kzvq5KDVxPtHVIeJbVusC75t5vom2nKkNd6yYKG4sjfAesLmGrkr9YnsM8UAag7XmS5P0XG8u%2Bgx%2FZ%2FxFNh5OF3Lm3ad5bMd%2FA0rcmOoD9H%2F4AqB51duljU22iRycBxc5LAjXkUR%2FEujEKqhWyXtSiTmg%3D%7Ctkp%3ABk9SR4qZ8fzVYQ
supervel45- Posts : 4502
Join date : 2013-09-04
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