Cylinder head cracks - where? · Aussieveedubbers

torana Slammed & Awesome Dubber

85 posts · joined Jan 2009 · 4 Jan 2015, 1:15 pm

#1006305

hi guys, couldnt find this on the site.
wondering where the common cracks occur in the cylinder heads?
about to build a type 3 1600 motor and would like to check.

Thank you
🙂 Muz

cb john Wolfsburg Wizard

470 posts · joined Jun 2007 · 4 Jan 2015, 3:44 pm

#1006311

The most common place for crack is between valve seats and / or between spark plug hole and one or both valve seats..

hus22l Officially Full-On Dubber

229 posts · joined Apr 2012 · 4 Jan 2015, 5:01 pm

#1006321

As I understand it, cracks between valve seats can be tolerated but cracks between valve seat and spark plug hole are not good. Obviously no cracks is best! Good luck.
🙂

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 · 5 Jan 2015, 8:34 am

#1006350

Don't forget to check inside of the exhaust port.
Between the seat and where the valve guide pokes into the port.

westi wrote:That's mad Alan.

vduboy Insano Dub Head

702 posts · joined Oct 2012 · 6 Jan 2015, 7:19 pm

#1006432

dangerous wrote:Don't forget to check inside of the exhaust port.
Between the seat and where the valve guide pokes into the port.

Bloody hell they crack there too?? How many have you seen like that Dave? I went through half a dozen s/h heads for the bosses cheap K/g motor build and seen heaps of cracks as mentioned and just ended up buying new ones.. 🙄

It will all be OK in the end, if it's not OK it's not the end!

torana Slammed & Awesome Dubber

85 posts · joined Jan 2009 · 7 Jan 2015, 4:51 pm

#1006485

thanks for the heads-up on where to find them guys, much appreciated 🙂