Join Date: Jun 2004
Location: Omaha, nebraska
Rep Power: 28
Well, your not going to like my theory's either way.
Yes, your on the right track thinking the valve guide seals
could be bad. But only on one head? Suspicious. And as long
as you had one head off, you might as well take the other bank
If the heads look OK, look closely at the cylinder bores for
wear ridges, or other abnormal signs of wear.
There is one perverted possibly here. The rings are suppose to
be staggered on the pistons when assembled. Maybe it was the
wrong day of the week when your block was assembled and
your rings are lined up rather than staggered. maybe a set of
rings is missing altogether? Maybe the pistons were undersized?
Since this seemed to happen since the engine change, i would suspect
some form of assembly/parts selection malice
The problem is that its much cheaper just to get another used engine
than rebuild yours unless you have the chops and tools to do it yourself.
My guess also is that if you had that much blow by on the pistons, you
would be seeing smoke out the tail pipe on hard acceleration, and the
intake plenum would be full of oily crud from the PVC venting.
I have seem very few Vulcan as insect foggers out the tail pipe of oil
smoke. Bad headgaskets are another matter. All my vulcans leak
more than they burn. Even the one was 200K on it.
Bob Urz 1989 Vulcan wagon (wife crashed) 1990 Vulcan sedan (sold running) 1993 Vulcan sedan (wife crashed) 1993 Vulcan wagon (beat up like Battlestar Galactica, drove to junkyard on a sad day) 1997 Vulcan sedan (down with multiple coolant leaks), 1998 Vulcan sedan (rescued from being junked twice with broken brake lines and bad rack, currently resurrected)
If Spock drove a Taurus it would be a Vulcan