Is this a broken valve guide?

Greetings!





Found this on tear down when valves wouldn't hold fluid on Ex #1.No damage to piston but valve gets hung up.
Question:is this part of the forged head or is the bottom of the valve guide?
Cant see a circleclip on the top of the guide either. How do you replace these guides?

Thanks

Looks like a valve collet halve... Would have had to be dropped down the spark-plug hole? Or just accidentally left unnoticed in the combustion chamber. The end of the valve guide does look chewed up!
RegardZ.

No this piece is broken in half cause the other half fell out when i was taping on the top of the guide. Dont have any experience with this so all is helpful.
If this the the bottom of the guide,how do i remove the guide it to replace?

stephen

771000LTD wrote: No this piece is broken in half cause the other half fell out when i was taping on the top of the guide. Dont have any experience with this so all is helpful.
If this the the bottom of the guide,how do i remove the guide it to replace?

stephen

head has to be heated in an oven and remove valve guide with an appropriate size drift or you can damage head by not heating :pinch: .....freeze new guide, heat head and install new guide with a drift till seated, get valve seat re cut to be concentric ......... get in pill(shim) range :pinch: re assemble......yer done :huh:

guide is driven out on the port side :S ......... if the valves got together (bent) that is what broke the guides .... check the intake guide for cracks also on that cylinder....... :pinch:

771000LTD wrote: Greetings!





Found this on tear down when valves wouldn't hold fluid on Ex #1.No damage to piston but valve gets hung up.
Question:is this part of the forged head or is the bottom of the valve guide?
Cant see a circleclip on the top of the guide either. How do you replace these guides?

Thanks

circlip for the guide is under the steel valve spring base...... :dry:

Valve guide replacement is where you probably will want to consider having it done professionally. As already mentioned, once the guides are replaced, the valve seats will need to be recut. I guess it can all be done DIY, but paying for this service will probably yield a better result.