mmm, intersting. Think i will ride out the old seats as long as possible with additive before it becomes necessary to take the next step.
Thanks for the input guys.
I'll just add something i found while doing some research which is the variance you find in technique and tolerances used by...
Contacted a local motorsport machine shop today to ask if they could install a set of hardened exhaust valve seats in my cosworth BDA aluminium cylinder head.
They said they could do it but there was no guarantee for the seats staying in place afterwards...
When i queried them as to why the...
