ok folks i need some help identifing a prop valve
the only markings on it are mb 34 kh 1230 or mb 34 kh 1250
i cant tell if the 2nd to last # is a 3 or 5
im trying to get my brake issue resolved
i got the above prop valve from ebmiller (not dissing you Ed, i need to make sure its the right part, i dont want to cut my lines, if its not the right one perchance), so i can find the right fittings, as 2 of my lines wont thread in, the prop valve is course thread & my lines are fine on 2 of the fittings, all the rest fit fine.
this is for a drum to disc conversion on my 88 iroc
thanxs, shawn

 

well after a trip to the GM dealer today, I figured out my problem, the prop valve i got is for a 89-92 4 wheel disc setup.
as GM did not put part #'s on the parts, its kinda hard to ID, but they did stamp a "code" on it which id it as for the 89-92 cars
so know i need to figure out what to do from here.
FYI if your ever wondering, if the prop valve has a "MB" stamped on it, its for the 89-92 years & theres another "code" for 88 & earlier (I forget what it is at the moment)

 

Hmmm...that's odd. Like I said, it came right off my '88. Can you find a '90-92 car locally and pull the master and prop lines off it? If you're still having problems with it I'll take it back...

Ed

 

im not blaming you Ed, Gm prolly made the car in late 88 & used 89 parts, like thats never happened
well give me a couple of days to see what i can find here, the newest car in the wrecking yard was an 88 (drum thou) so i may have to find the earlier one.
so all id need to convert to the newer stuff is this prop valve, a MC & the lines ?
so far the lines are the problem, as i cant find any fittings to fit this prop valve

 

That in itself would be strange, since the change happened mid-year in 1989. Early 89 cars have the old thread pitch and late 89 cars have the new one.

 

That's what got us all screwed up...that was my stock '88 J65 prop valve, and he's installing it on his '88 so it should be a direct bolt on, only he's having install issues with it. That prop is P/N 14089497, '88 J65 iron caliper disc brakes.

Ed