R90/6 Exhaust Valves and Valve Guides

[SCBuckeye]

In case anyone is interested, here's where I am on all of this: Took the heads to Noland Cylinder Head in KC. Their top gurus said that the valves all look fine. Intake valve guides were fine. Exhaust valves guides, not so fine. They are going to regrind all faces and seats and replace the 2 exhaust valve guides (I will have to supply the guides, Engle Motors says they have them in stock). It will cost around $180 (tops) and take about a month.

Are these guides you are purchasing from Engle motors from BMW? And, if so, what is their part number?

If they are non-BMW, then what are they made of? What is the mfg. and part number?

I am still deciding on what to do with mine, but if I do them, I want to take them someone who really knows BMWs and has the proper size tools to do the valve guide reaming for the valve stems being used or re-used.

Also the proper angled grinders to grind both valves and seats.

 

[banzaibob]

Of course I will make sure but I would assume that yes, they are genuine BMW parts. Every part that I have ever bought from them has been genuine. The other day when I inquired, he was able to find out the part was in stock by looking up the part number.

As far as whether to use a BMW "specialist" over my local cylinder head specialty guys (Noland, KC), that is indeed a fine line. First off, the price of my local guys is definitely right especially considering that everything that I have had done there in the past has been stellar. I think that I would lean more toward a BMW specialist if I was using this for racing applications or there was simply more wrong with the heads in general. $180 vs. $500. I simply don't have enough money to say that money is no object.