MkII
|
| posted on 23/4/10 at 09:19 PM |
|
|
xflow valves
Ive had the valve guides replaced and bought new valves,collets and retainers for my 1600 crossflow but if you assemble the valves,collets and
retainers off the head and without the springs there is some play between the valve stem and the collets, one of the reasons ive replaced the parts is
that when I stripped the head I found 2 broken collets, do you think the play between valve and collet is going to cause the same problem again?
.thanks .m.
|
|
|
|
|
MakeEverything
|
| posted on 23/4/10 at 11:18 PM |
|
|
quote:
Originally posted by MkII
Ive had the valve guides replaced and bought new valves,collets and retainers for my 1600 crossflow but if you assemble the valves,collets and
retainers off the head and without the springs there is some play between the valve stem and the collets, one of the reasons ive replaced the parts is
that when I stripped the head I found 2 broken collets, do you think the play between valve and collet is going to cause the same problem again?
.thanks .m.
The collets are pressed against the top of the valve and the spring seat, so as long as they fit into the recess it should be ok? For the sake of a
few quid, is it worth getting new valves and lapping them in?
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
|
|
|
snapper
|
| posted on 24/4/10 at 05:21 AM |
|
|
Collets are designed to be a loose fit, this allows the valve to rotate. On high performance Pinto's some builders rub the collets on wet &
dry so they are atight fit, this is to prevent the locating grooves on the valve stem from burring.
[Edited on 24/4/10 by snapper]
[Edited on 24/4/10 by snapper]
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
|
|
|
richardlee237
|
| posted on 24/4/10 at 06:16 AM |
|
|
With normal manufacturing, it is impossible to ensure that the centre of the hole in the spring carrier will stay on the centre line of the valve as
the valve is depressed. Hence there is some clearance between the collets and the valve stem to allow the 2 components to align. Without this there
would be a side load imparted into the valve stem causing excessive wear of the guide or even failure of the valve stem.
Quote Lord Kelvin
“Large increases in cost with questionable increases in performance can be tolerated only in race horses and women.”
Quote Richard Lee
"and cars"
|
|
|
