On Thu, 07 May 2009 14:43:07 -0400, "Steve W."
wrote:

stryped wrote:
I have some replacement heads out of a junkyard. I am wanting to
repair this vehicle as cheaply as possible. The heads are rough
looking, rust inside the valve and everything. I will say that I
filled up the intake ports with cleaner and it held overnight. (Paint
thinner).

Someone told me if I take the valves out to clean everything, It might
not seal right when I put it back togther, and I could have a miss or
check engine light.

My origional intention was to take it apart to clean it and to lap the
valves. (And install new valve guides that came with my kit).

If you're going to install new guides STOP NOW. Take the heads to a shop
and have them remove the old guides and install the new ones. They will
then ream them to proper size then cut the seats to match the new valve
centerline.
That would HAVE to be done if you install new guides.


The guy at the salvage yard said they came off a motor with a lower
end knock. The heads were checked for flatness and are within .001.
They were taken off the motor a day or so before we got them.

But how long was the engine sitting with the intake open to weather,
etc. before the heads were pulled.
Have the heads dissassembled and guide clearances checked.. Have the
seats touched up with a proper seat cutter or stone and have the
valves touched up on a valve grinder.

If the guides are a wee bit loose they can be resized with an internal
Knurl. The knurl will also help hold oil - I've seen knurled guides
outlast new replacement guides in the field.

Put the new seals on and you know you have a proper repair.

Then they should be OK. I would clean them up good, replace the stem
seals, give the valves a fast lap job (just to make sure they are close
to OK) Then clean them again and install them.


I need to get this thign going cheaply. I am going to get rid of it.
SHould I leave the heads alone and just mount on the truck or take
apart, lap the valves, etc?

I know the "ideal" thing to do would be a valve job, tanked, etc, but
around her eit is alot of money and I plan to get rid of it.

Thanks for any advice!

Since you plan on getting rid of it then just clean them up and bolt it
together and sell it. Don't bother thinking about it more. Just DO IT.