Nick325xiT 5spd· Registered User
Discussion Starter · #1 ·
I've been obsessing about the CDV lately. I'm going to have to get my car up off the ground sometime and go exploring with my camera.
"Clutch Delay Valve." It's essentially a restrictor plate on the hydraulic line leading to the clutch. It's designed to minimize driveline shock by limiting the speed at which the clutch can be engaged. Some argue that it is the reason that certain E39s are hard to drive smoothly.Cowboy said:Ok, I'll bite. What's a CDV?
Let me guess.. Central Drive Valve! No, wait.. hmmn.. Carbon Dating Ventricle! No, that's not it.. how about a Clutch Doo-whack Vestibule!
I don't know about Xi's...But I know on i, Ci, and iT's the reason is due to the self-adjusting clutch mechanism...there's a spring loaded mechanism that pushes the clutch plate to a certain position as it wears, and that spring mechanism is also buffering the clutch engagement. I've been under my car exploring the clutch hydraulics system and CDV doesn't exist as a seperate valve on the later production E46es.blackdawg said:the dual mass flywheel has that lousy mushy feeling upon engagement.
I think the xi's have different gearing. On the bmwusa site they list the gear ratios as the same for the i and xi but the final drive ratio is different. :dunno:pps-325xit said:According to Bentley manual, xi's have same make of transmission as the 330i's, but it's a different model.