hi all.
well, soon i will start reassembling my type 2 305 motor. everything is clean and blasted, i need to do some paint, but otherwise, i'm about ready. except.....
i need to deal with the cylinder head. more specifically, the valves.
what is involved with a valve job? do i need to recut all the seats etc, or do i just lap them in? what special equipment is involved? do you guys do your own?
i really want to do as much as i can on this myself, though i have had an offer from emo to ship my head to him and have him do it, for what i am sure is THE way to have it done correctly and for the least expense. which i am totally ready to do, except for the "do it yourself" aspect. i am already going to have to have some other clown bore out my cylinders....which scares me to death. well, maybe not to death, but i still wish i had the tools/knowledge to do it myself. so, any advice?
oh, and another quick question....any lock-tite on reassembly in the trans/motor?
thanks in advance, guys!
greg
valve job advice
Greg,
Fortunately you have choices and quite a few. If the seats and the valves are in great condition, a quick lap with fine grinding paste (available from Sears or NAPA etc) should be fine. You want to see an even dull gray line where the two surfaces are lapped together - about 2mm thick. If the valves or the seats are pitted, you should get both teh valves and the seats resurfaced. Old school mechanics used either cutters like Neway cutters or small grinding stones and an electric drill. Then they face the valves on a valve facing tool which is a specialized bench grinder. By far the best way is to have them cut by any auto machine shop with a SERDI machining center. SERDI are state of the art valve seat cutting machines and IMHO are the only way to get seats cut. You don't need a fancy radius cut or 5 angle cut. A simple 3 angle cut is fine. try your local Auto store or M/C repair shop. I get mine done at a local speed shop. the guy that runs it is an old school gear head and knows what he's doing. Your local Auto speed shop should be fine. Find one that does IMPORTS ie Honda Civics etc.
Re: valve job adviceUsually the intake valve has hammered into the seat enough to change the valve surface from flat to sort of rounded and the same for the seat.
Plus the stems usually require a new surface as the adjuster will have indented it. Most times the exhaust will have a decent face and seat surface but need the stem surfaced. "OLD SCHOOL SAYS TO NEVER GRIND THE FACE OF THIS VALVE AS IT IS TREATED" I do find them with pits (water) and those I trash. HONDA spec for contact area as 1.0 MM and ya will be hard pressed to have the 39 degree angle as the hole is usually already bigger than your HONDA broach will ever touch all sides. The HONDA broach for the top (60 degree) surface is a rounded not flat cutting tool. I do complete head cleaning/blasting (round beads) cams and valve jobs here for $90.00 US. I have all parts to replace any bad ones new and perfectly good used at reasonable prices. Get in touch if interested. ..................lm
EMO Valve job!I have had Ed do many valve jobs, head restorations for me and they come back to you a thing of beauty, looking better than new. You won't be disappointed. I don't know how he can do all that he does with the head for such a small charge. John B
Re: EMO Valve job!The price is that amount as I really don't want to charge more to help the owner have a ready to install head at what I think is a fair price.
The other reason is I like to do the heads. .................lm
valve workI'm in a similar predicament...not sure I want to tackle a valve job on the CL77 I'm working on. Any recommendations on a good place to get work done (i.e. who's this Ed guy!)?
On a side note, this forum looks great...I have already used it to solve some of my problems.
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