Fw: Broke exhaust valves on 4000 turbos

[Orin Eman]

> > We finally got Seans car taken apart tonight and yet anouther
> > broken exhaust valve.  This time #3.  This makes 3 confirmed valve
> > breakages in 4ktq's that I know about.  All seem to happen the same
> > way.  2 of the 3 had good intercoolers 1 even being a stock 5kt
> > intercooler.
> 
> > They all apear to have broke near the base of the stem.  So does
> > anybody know if the 10v turbo's in 5kt's have had problems with
> > valve breakage?  If they do I have never heard of it.
> 
> What engine/head/cam?  Sodium-filled valve stems?  Was a proper
> turbo engine head fitted, or is it the original non-turbo head?

All MC engines with MC heads...  Pat's head was 'refreshed' before
installation in the 4kq - one would think it would have the right
valves though.

> I've never seen a stock engine break an exhaust valve.

Neither have I.

Orin.