EV0300
Well-Known Member
Its getting close to the time when i buy my cams, springs and gears. Just wanted to know if i should be changing the valve seats to better ones or leaving the stock ones in there?
quick question on putting cams in
- Thread starter EV0300
- Start date
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4piknup
master of none
If you are talking about the hardened stellite valve seats in the head, they are pretty big job to change them and no point unless there is something wrong with one of them.
Leave them as they are, just get 3 or 5 angle machining on the seats for the new valves.
It is suggested that 1mm oversize valves are a worthy upgrade
If you are talking about titanium valve retainers, go with the cam people recommendation for springs and retainers
Leave them as they are, just get 3 or 5 angle machining on the seats for the new valves.
It is suggested that 1mm oversize valves are a worthy upgrade
If you are talking about titanium valve retainers, go with the cam people recommendation for springs and retainers
EV0300
Well-Known Member
I wont be doing the valves until i do a full rebuild, i plan on getting GSC s1s 268, with the gsc beehive valvesprings and titanium retainers just for abit more power until i can rebuild the engine.
4piknup
master of none
Just check to see if any valves are leaking when head it off, by 1/2 filling port with kerosene.
Hand lap your valves and recheck for leaks.
Wire wheel the carbon off back of valves and clean ports with little wire brush.
Will cost very little but time.
You don't have to pull head to put springs and retainers in tho.
Hand lap your valves and recheck for leaks.
Wire wheel the carbon off back of valves and clean ports with little wire brush.
Will cost very little but time.
You don't have to pull head to put springs and retainers in tho.
EV0300
Well-Known Member
I wanted to put non ticking lifters in also. I was hoping I could get it all done without removing the head.
4piknup
master of none
Some guys use compressed air and fittings and all sorts of gear. I just use some 6mm soft rope, like clothes line, and feed it into spark plug hole when piston is at bdc, then turn engine slowly by hand until rope is compressed against valves.
I would give the engine a leak down test to ensure valves are fine or a wet and dry compression test, before deciding if you need to pull the head or not
I would give the engine a leak down test to ensure valves are fine or a wet and dry compression test, before deciding if you need to pull the head or not
EV0300
Well-Known Member
Yeah I will be doing a wet and dry comp test before I decide what to do.
Rockabilly
Well-Known Member
If you do it with the head on, clean the valve stems & put new valve seals on them.
Otherwise your new higher lift cams will make your seals hit the dirt biuld up on your valve stem.
Cheers !
Otherwise your new higher lift cams will make your seals hit the dirt biuld up on your valve stem.
Cheers !
