Sunken Exhaust Guide-Definition

Was just reading another post when I came across a term 'sunken exhaust guide'. What might this mean and what might the problems be associated with this? Thanks.

the only thing I can think, is the guide has moved in the head, just a guess

yes.
the guide has moved down about a 1/4 inch.

Yeah, I guessed that, but if the guide isn't markedly out of place, would that have a negative effect on performance? My reasoning being that what holds the valve in place are the springs/keepers and the stem is relatively long. Can the valve guide be slightly placed differently and still function?

EDIT: and yeah, Steve, it was from your discussion... and if you haven't guessed, I also have a sunken guide:)

Post edited by: Mcdroid, at: 2007/06/10 11:51

I would want to find out why it has moved, if it goes down that much it can gauld on the bottom of the valve, heat transfer plus the gulde being too far down in the heat path

Sounds like the clip came off and letting the guide drop.

As for running them slightly low, no problem. Our guides are made to sit 1 mm lower in the head so that no mater what cams you run, you will not get retainer to valve seal interference.

Jay

thanks jay!
but i already sent it out and are having oversized guides installed.
needed 4 intake valves also so bigger stainless ones are being installed.
damm! bigger valves?
now i need some porting work done!

now do we all see the money pit as i do?

the quest for more power is a mighty mistress!

a wise man once told me to spend all my money in the head because

"it can't go if it don't flow"

Post edited by: kawsakiman, at: 2007/06/13 22:41

kawsakiman wrote:

thanks jay!
but i already sent it out and are having oversized guides installed.
needed 4 intake valves also so bigger stainless ones are being installed.
damm! bigger valves?
now i need some porting work done!

now do we all see the money pit as i do?

the quest for more power is a mighty mistress!

a wise man once told me to spend all my money in the head because

"it can't go if it don't flow"<br><br>Post edited by: kawsakiman, at: 2007/06/13 22:41

thats what makes the power,but bottem end keeps it all together:P