1994 530i rough idle, cylinder miss?

[infinity5]

"immaculate compression"
aaahahahahahaha

[Been-Jammin]

F 190 205 210 215 |
R 1* 2* 3* 4* |
O |Firewall
N 5* 6* 7* 8* |
T 215 208 205 210 |

The valve covers are riddles with this nasty coating looks like what used to be some kind of coating. They are going to get dropped off at the powder coaters in the morning. With any luck they will be ready by Thursday.

Leakdown test posponed to next week, UPS is now predicting Sept 6th.
Going to R&R the intake tomorrow, the intake seals & PCV came in early.

I don't have a Bentley yet, so any technical information is greatly appreciated.

Here's a pic of the valve covers: (YUCK)

[infinity5]

yep. thats what comes on the valve covers from the factory. Whatever it is is comes off and turns yellow and looks terrible. I kept meaning to get my VC's powder coated but i kept putting it off and now i don't have the money.

[infinity5]

Been-jammin, If you don't mind my asking, where in "noth east florida" do you live? my home town is gainesville and right now i'm in school down in Tampa.

[Been-Jammin]

Been-jammin, If you don't mind my asking, where in "noth east florida" do you live? my home town is gainesville and right now i'm in school down in Tampa.

I'm in Jacksonville, near the beach. Been here almost two years. Hometown is Hoffman Estates, IL just outside Chicago...

[632 Regal]

dude, you DO NOT HAVE NIKASIL FALURE!!!!!]
compression tests are read.
You have a healthy baby girl that needs some simple attention!
Congratulations man!

[winfred]

yea id say that's going to be good to go, i suspect a good quanity of the dealer diagnosed dead nik's were not a bad block but a pissed off computer and some sort of running problem that started it, i've seen and fixed it

[Kalevera]

Actually, they don't look *that* bad. And they were coated with some kind of paint or primer from the factory....it's simply burnt off with time.

The stuff is called cosmolene. Really a pain in the ass -- we had a practically new euro delivery M3 in a few days back and they sprayed it on the underbody, as most car manufacturers do (only with BMW getting cheaper in their ways these days/starting to chevrolize everything, it seems to be taking the place of the classic underbody protection stuff). It was hard to tell whether the underbody was covered in cosmolene or the result of an oil leak.

best, whit

[Been-Jammin]

Actually, they don't look *that* bad.

best, whit

There's a great powder coater here in town that I was hooked up with a year ago. He's done the entire engine compartment on my Mercedes and almost all of my race bike. We'll see what he can do with these. I'm going to have him coat them "black asphalt" which is a highly durable textured finish. It appears that the metal is fully intact and only the coating is fubar. Once they are bead blasted, we will know for sure. I'll post pictures when I get them back. (hopefully Friday)

[Been-Jammin]

yea id say that's going to be good to go, i suspect a good quanity of the dealer diagnosed dead nik's were not a bad block but a pissed off computer and some sort of running problem that started it, i've seen and fixed it

I'm quite pleased with the results.
A little concerned with the #1 cylinder, though...

Does anybody know the BMW acceptable tolerances for compression?
(I did look online, but have not found any technical specs yet and the Bentley is on order..)