OST-029: California here I come.....

[oldeskewltoy]

oldeskewltoy Wrote:So last "quiz" on this head....

What's up?

really? no one even has a guess??? Even a quick view @ the pic title gives MOST of it away.... "disassembled_exhaust_valves_for_tipping.jpg"

How much easier can I make it???


alright.... what is seen above.... the intake cam is in, the exhaust cam is not only not in, but all the exhaust valves are out in box-stock type cardboard, each marked with two series of numbers (1-8 ), and a second series that appears to be measurements (apologies for not marking the type of units used).

So the story.... The new cams were unpacked, and I began on the exhaust side. I used all 2.9mm shim to begin, and once the cam was tightened into place, and I checked... I managed to get 3 readings... all .0015" (spec on exhaust is .25mm, or .0100"), the other 5 were just too tight to even get a measurement. So, I removed the 5 shims, and fitted 5 of the thinnest shims I had, remeasured and found to get proper clearances I'd need to order 7 shims ranging from 2.5mm to 2.70mm.

To make a LOOONG story much shorter... the second series of numbers that appear to be measurements are measurements of how much each of the exhaust valves need to be tipped. Tipping the valves will get their clearances back to a range were special ordered shims are not required(2.8-3.1). It will also allow for a 2nd valve job to be done on this head and still be able to shim it, something that would not be possible if I didn't tip the valves today.

Now the good news... the intake side was set just fine, no weird things there. 5 valves are set @ .008" and the other 3 are @ .009"




more to come....