<html><head></head><body><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir="ltr" data-setdir="false">Doing a routine engine check on Sunday - found a problem with the intake valve on one cylinder. Pulled the head and valve - there's a burn mark on the back face of the intake valve. Lapped it and the seal surface looks good, did a temporary installation and leak-down check. No go, still getting roughly 40% leakdown past the intake.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Drat.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Spending time tonight trying to get the backup cylinder head prepped an installed.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I need to make a race weekend starting on FRI (racing FRI/SAT at Thompson.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">On the one hand, I'm glad I found it - the engine sounded fine. But the leak-down test didn't lie. Glad I pulled it before I broke something. Hopefully, the head is salvageable. <br></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Regards,</div><div dir="ltr" data-setdir="false">Bob Lang<br></div></div></body></html>