Surfacing head

[Mike Hewitt]

I took my head to the machine shop and they told me they had to take out the cams to resurface the head as the valves sit too low

Is this correct, I can't find anything on any forums about this..

Any experiences here?

[Richard Clark]

My valves had to be popped out to resurface. Now is the time to do the stem seals also.

[Matt Mann]

I do concur mine had to be removed before a resurface

[Mike Hewitt]

Yeah I just picked it up, and can see that they do in fact need to be out to machine the head.

Now, the question is, do I want change cams as well..

I did have the head pressure checked and it was all top notch. Do I want to change the seals still? The guy was telling me that he has seen people pressure test head, end up changing seals anyways, and then the head doesn't hold pressure as well as it did before..

I think I may look around for some inexpensive cams..

[Matt Mann]

I would still change the valve stem seals because the last thing you want is to put that back and fire it up, drive around and start pushing some blue clouds. Better safe than pissed off and have change them on the block right??? I find it hard to justify this guys comment about people who changed seals anyways and lost pressure...just does not make any sense when you really think about it.

[Richard Clark]

Ya, i agree with Matt.  New vss are cheap. Do it right the first time or your just asking for somthing to happen. 

And I think Marke Bailey was going to be selling a set of HKS 264's.  Send him a pm.

[Mike Hewitt]

They are a pretty decent place in town quality wise and were the only ones actually interested in explaining things to me..

But his reasoning with not replacing the valve stem seals was if it wore on the actual valve itself, then replacing a seal that is not 'worn' the exact same way as the valve.



EDIT: I was planning on changing the seals 'till he told me that. Was about to order up a set from Ziggy at RTM Racing. And thanks for that tip Richard.

[John Hartman]

no, change the valve stem seals.

[Ivan Skare]

If the head is out do everything you can to it. Overlooking the valve seals is just plain stupidity.

[Mike Hewitt]

This is the first internal part of the engine I've been working on "by myself" so I figured I would trust the professionals on it. Wrong! Lol

I DO plan on doing seals, 3 gen lifters, and cams. And will go from there once things start coming apart if I find parts needing replacement.

[Ivan Skare]

This is the first internal part of the engine I've been working on "by myself" so I figured I would trust the professionals on it. Wrong! Lol

I DO plan on doing seals, 3 gen lifters, and cams. And will go from there once things start coming apart if I find parts needing replacement.

I suggest polishing the exhaust ports and bowls

[John Hartman]

and a 3 angle valve seat cut.

[Markus Johnson]

If your interested, check out BogusSVO's posts.  He is a machinist with some good DSM knowledge you might find helpful!

http://www.dsmtuners.com/forums/articles-engine-fuel/