26 replies to this topic

[Dusky]

 

these don't look too deep, do they?

[Fast Ivan]

no, they don't look to deep

[Spitz]

Why would one need to recut the valve seats if replacing the guides?

Edited by Spitz, 10 March 2015 - 09:36 PM.

[Fast Ivan]

this is why

 

 

new valve guides fitted, reamed to size then the new valve offered up to see how far out it was before the seat was recut

[Spitz]

ooooh....little bit of compression lost there

[Fast Ivan]

just a tad!

re-cutting the seats was followed by plenty of lapping with three different grit pastes the result being just about a perfect seal

[Dusky]

Only a little bit the valve guides do seem to have a groove at the bottom, wich i couldnt see with the spacer fitted..

[gazza82]

Groove should be near the top ... ? If I get a chance I'll take pic tomorrow ...


Feel free to beat me guys & gals

[Fast Ivan]

I've got a 12g202 head and it to has valve guides with no groove......

[Spider]

this is why

 

 

new valve guides fitted, reamed to size then the new valve offered up to see how far out it was before the seat was recut

 

 

ooooh....little bit of compression lost there

 

 

I see the light! 

[Dusky]

Hmm, just had a word with a local machine shop , they would charge 112 euro's to cut 8 valve seats... Belgian prices, gotta love it...

Edited by Dusky, 11 March 2015 - 10:37 AM.

[Spitz]

Wow....last year I was charged just $106 to shave .005 off the head, and re seat the valves and then put it back together