Rob Edwards

If Mark has 'em, and you can get Greg B to measure them to yay/nay them, I'll ferry them between the 2 shops for you. Been making that trip a lot, lately.

danglerb

Mark stands behind all of it for a year, so I would expect them to be fine.

Can they do anything to make the size on the valve stem uniform and use a smaller guide?

mark kibort

the used valve route is a good one.

Mark

Ducman82

very kind, thank you. ill call mark/tom tomorrow . i have been doing that a lot lately too.. :-P

thanks for the moral boost.

toofast928

I have some used Euro valves you can have. Already been cut. Send me mail if interested.
Tony

Ducman82

email sent.

Podguy

Call me inexperienced but this is the strangest thing I have ever heard. Correct me if I am wrong but the guides are made of Bronze and the Valves of harden steel. It would be logical that the guides would wear long before the valve stems. Maybe with a million miles on the engine with multiple valve jobs -just maybe I could buy this. But I have yet to see a 928 go a million miles. Actually from what i have seen with used and abused engines in the 150K mile catagory is very little wear. These engines are not like GM engines and could with care well go a million miles.

Confused

Ducman82

marks does not have any valves...

Ducman82

head part number is 928.104.348.2R Intake is 45mm, exhaust is 40. its an EARLY head with shims at the base of the springs, not spring cups.
so those above part numbers are what i need? i can't seem to find any info on the real early head valve numbers...

928mac

My theory is that the engine carbon gets into the oil and works its way into the softer brass. the brass holds the carbon and the valve rubs against it, thus waring the valve stem.

Moral of the story, change your oil when it starts to look dirty.

Ducman82

Bingo. just got of the phone with the engine shop asking that same question he did. thats the cause for sure.

Ducman82

got the rings installed on the pistons. now the fun part of wrist pins and c clips. Question guys. i numbered the rods, but for the life of me i can't remember what way they face.... part numbers to the front of engine or back...... WSM does not seem to say.. at least from what i can find.

Ducman82

found it.

danglerb

Oil when its working, looks dirty, its the detergent additives that keep stuff suspended in the oil, but if it goes through the filter I suspect its not a wear factor on the engine.

Ducman82

Light oil on the cylinder walls, reline lube on bearings, torqued con rod nuts to 54 ftlbs per wsm .... Yay!