KRE 290-295 heads by SD
 

Trying to get hold of dave for some info, assume hes busy, any that has these heads, im looking to get new viton seals..............cant seem to find the size on these.

Thease heads are from 2010 with about 25 thou miles on them.............having the motor redone with my oil issues..........dont know if the seals are bad or not, just thought i would get them just in case...............another thought if getting new seals, does it pay to get springs and guides also.

Thanks

Rich

You can check the seat pressure on springs and see if they have lost much vs replacing them automatically. And check how the guides feel if excessive wear. If down that far I would replace the seals.

There’s two questions that need to have a answer, and I can resolve one for you,
You need seals for 11/32” valve stems, but the 2nd part that I can’t answer is if the guides are are sized for seals that are .530” ID, or if they have been cut drown to .500”

If the heads have solid guides then you will need the .500” seals.

Comp cams sells both.

Any time you disassemble the heads and the in doing so the valves get pulled out through the seals, then new seals should be installed!

It’s cheap insurance.

Also good oil control calls for good seals and good valves.

If your machinist finds any valve stems that are worn more then .001” then they should get replaced, and replace with valves with hard chromed stems like the factory builds with.

And the same with .001” or more worn valve guides.

Oh boy, was hoping this was gonna be easy. lol..........the only thing i find for the guides are 2.400 long full bronze valve guides............hoping Dave can fill me in on the other stuff, so far havent heard from him.............was hoping someone with this set up could fill me in with some info............at least that way i could get the stuff to the builder.

Out of curiosity , should all this stuff be going out of whack with so little miles, 20 some thousand.

Rich

Precision sized guides

High flowing multi angle valve job on our Rottler SG8 seat and guide machine

Ferrea stainless steel valves with multi angle cuts for better off the seat flow

Chrome moly retainers with 10 degree locks

Viton seals on intake and exhaust guides, for the best oil control available

This i got off SD website..........not much help there...........hopefully i can get hold of Dave soon..........unless someone has this info handy, i can find any of my stuff.

Rich

Put down the beer and found this.........Maybe25 steve can figure this out.

Rich, just call KRE and ask them
They will know right off the top of there head, no pun intended.

Will, do.............i thought Dave did something different with the heads other than the cnc stuff.

Rich

They don't make the 99893 springs anymore. As far as valve seals, can't you remove one and measure it. There are lots of sources for valve seals. A replace spring for the Crane 99893 is a Howard 98445.

Thanks for that info on the springs.............the motor and heads are at a shop, i was trying to get stuff ahead of time.........

Called KRE, they said the vinton seals are 11/32........530

Rich

Just was reading this on Crane website.. on seals. https://www.cranecams.com.au/index.p...ew-viton-seals

The PSI spring CT1225ML maybe another spring for replacement. There are a few slight differences. Would need professional head guy to confirm.

Hey Chuckies...........thanks for the info, so far it looks like those crane seals are all on back order.

Rich

These guys have lots of seal too. https://www.cvproducts.com/

The comp cams # for those seals is 529-16

Hey thanks guys, i finally got it figured out............didnt take all day.......yeah, it did.

Rich

I have a good set of 99893's if needed.

Hey ta, if in no rush, could you hang onto those, i havent heard anything from the shop yet..........who knows when he is gonna start checking things out.

Rich

Yes will do.