Valve clatter

[MHLIGGINS@aol.com]

	I've continued to dink around to resolve an apparent problem with the '91 10v
turbo engine I installed in my '87 5KTQ.  Primary symptom was that the boost
went away at times, especially when it was warm.  I've checked most of the
"normal stuff" as suggested by several q-listers.  Car is in basically stock
(ECU and waste gate) condition.  The only changes are that the engine is four
years newer (thus slightly higher compression) and I also used the K-24 from
the donor car.
	Now that the outside temps are going down a bit, I've run the car some with
the windows down and the a/c off.  What I'm finding is not what I wanted to
find.  Under heavy acceleration the valves rattle like they're about to come
out.  It's beginning to appear that the low mileage engine (77K) I bought had
been trashed.  But, just in case I missed something (always a possibility),
please refresh my memory as to what could have been installed incorrectly to
cause the valves to clatter.
	I would normally suspect timing, but the ECU controls that.  Any comments or
suggestions appreciated.  But at the moment I'm fearing the worst, might have
to use this head on the old engine with high miles -- at least it didn't
clatter......

	Thanks.
	--ml