paxdad

Thanks for the replies. I will call RYP on Monday to follow up on the email I sent on Saturday. Yes the top of the barrel/cylinder is flat as I even milled it down 10/1000th to make sure it was good and flat. The inner and outer orings have a good seal as I checked with a compression gauge and there was no leak down after 5 minutes!!.

I don't have a gasket it is an inner and outer oring with six individual orings around each cylinder stud. The photos on the S3 website show the sherco motor with head bolts and what appears to be a copper compression washer between the head and bolt.The seal around the inner oring is good as it holds compression when I put the compression gauge to it. Appreciate the quick reply.

Newbie to the site.... I just finished assembling the motor on my 2004 1.25T and installed an S3 Star Head. Looks great but leaks coolant around each of the 6 cylinder studs/ nuts. All o-rings are in place and are flush/ flat against the cylinder and head surfaces. Head nuts are torqued to 10 foot pounds etc. The head insert is aligned with dowel pin on the head. What have I missed??? The leakage is around the stud at the nut no where else. Just a couple of other issues if you plan to purchase one of the S3 heads: I had to turn down the head nut shoulders to allow for enough room for them to clear the head and then turn down a 10mm socket to fit over the nut and between the head as the clearance is very tight. Thanks in advance for any insight and input.