WellSeal Can't Be Shipped To USA

Previously ian_soady wrote:

Mind you a quick google turns up these people: https://www.pegasusautoracing.com/productselection.asp?Product=3304 who seem to be in your neck of the woods.....

Ian, thank you so much for finding WellSeal at Pegasus Racing. I didn't get them as a hit when I Googled WellSeal. Also thanks for the offer to send a tube but not necessary.

I just ordered a tube from them which they can send to me via UPS ground.

Yes I too am amazed at how overly and unnecessarily cautious the world has become.

Ron

Previously ian_goodhall wrote:

People in the US seem to use Yamabond where we use Wellseal.

Ian

Thanks Ian, Ian Soady did find a US vendor for WellSeal and I have ordered a 100ml tube which they can ship to me.

Also see Ian Soady's comment on his preference for WellSeal.

Ron

Previously david_evans wrote:

If your head is leaking from the third fin, fixing it with welseal is treating the symptom not the cause. The head might be not flat, front studs may have broken through into the pushrod tunnel. A composite gasket with flame ring should suffice in this situation without any sealant IMHO. If you have a reed valve fitted to reduce crankcase pressure that may prevent leakage also (provided its working)

David,

I have ad my head made flat at a local competent auto machine shop so I don't think that's an issue.

I have not checked to see if the front studs have broken through to the pushrod tunnels -- I will -- thanks for that "heads up".

Regarding a reed valve. I fitted a Jeep PCV valve as another club member suggested and also bought and fitted a more secure brass check valve. The higher quality brass check valve was truly more "one way" than the loose PCV valve.

Forgive my asking but please confirm that the correct orientation for these valves is such that the crankcase pressure generated on the pistons down stroke is allowed to pass through the valve. That in turn means that as the pistons rise a partial vacuum is theoretically created in the crankcase.

Ron

Previously Tony Ripley wrote:

Previously Ron Wellman wrote:

....

Forgive my asking but please confirm that the correct orientation for these valves is such that the crankcase pressure generated on the pistons down stroke is allowed to pass through the valve. That in turn means that as the pistons rise a partial vacuum is theoretically created in the crankcase.

Ron

Correct, the idea is that any positive pressure vents out so you then only have roughly equal to ambiant of negative.

You may find that any valve that has any real mass, such as using a ball bearing under spring pressure, will not be able to respond at high revs (what high is I could not say).

Previously Ron Wellman wrote:

Previously Tony Ripley wrote:

Previously Ron Wellman wrote:

....

Forgive my asking but please confirm that the correct orientation for these valves is such that the crankcase pressure generated on the pistons down stroke is allowed to pass through the valve. That in turn means that as the pistons rise a partial vacuum is theoretically created in the crankcase.

Ron

Correct, the idea is that any positive pressure vents out so you then only have roughly equal to ambiant of negative.

You may find that any valve that has any real mass, such as using a ball bearing under spring pressure, will not be able to respond at high revs (what high is I could not say).