Core Shift in Cylinder Head Castings

PANAVIA · #1 (**permalink**) 01-13-2009, 02:36 AM

Has anyone had Casting issues with core pattern shift in an aftermarket cylinder head >?

I am having problems with a set of heads that the coolant passages are too (@*$(@)(#) close to ports bolt holes and chambers.

wanted to see if this is a percentage of all heads or if we just got a bad set from a supplier.

(name of heads and supplier removed as not to start a flame war)

Steve

quickjack · #2 (**permalink**) 01-14-2009, 01:54 PM

Core shift is an issue that foundries always have to work to control. It is possible to keep it within very close limits, and if your heads have a problem any of the reputable aftermarket manufacturers (specifically, the one who made them) will likely be willing to make it right for you.

This is not typical, not a common problem with aftermarket heads being shipped to a customer this way, at least from the major companies.

PANAVIA · #3 (**permalink**) 01-16-2009, 03:23 AM

Well --we are going to try that out as I have a set of heads that have 2 issues.

#1 Core Shift
#2 porosity in the castings.