CDV Delete

mbsl98 · 03-12-2012, 02:44 PM

I am getting ready to do the CDV delete on my e93, and then on my e61 if I like the result. The only piece I need is the right brake fluid to add to the BMW dealer installed fluid to top off. The car has pretty fresh fluid done a few months ago by BMW Gallery-Norwood under the 4 year coverage, so I am not planning on a full fluid flush. Can someone tell me just what fluid I can buy locally (AutoZone, etc) that will be 100% compatible? Thanks

e90pilot · 03-12-2012, 03:15 PM

Anything DOT4 should be compatible. I think DOT3 is too but I'm not sure. If you want to be safe, you can just buy a bottle at the dealership. It's not that expensive.

mbsl98 · 03-13-2012, 08:36 AM

Dealer would be fine for such a small purchase, but it is a pain to get there while the parts dept. is open. Seems that it should be simple to buy a quart of good stuff at local store, just want to be sure I get compatability with dealer stuff - DOT 4, DOT 5, other?

SavvyByNature · 03-13-2012, 08:41 AM

Does the CDV delete make a big difference with the drivability?

mbsl98 · 03-13-2012, 09:25 AM

There are a lot of threads on the CDV delete, all saying that it makes the clutch much move satisfactory (firm and positive action). I am hoping that deleting teh valve removes the disconnected feel of clutch and makes it more like an old fashioned action where you can actually tell when it is at the engagement point, etc. I have never seen an authorative write-up as to why that valve is being installed by BMW, but it has been there for something like the last 10 years, I think. Roundel writers have said that it also causes faster wear of the clutch, versus a good clutch driver with no valve. In any case, it looks like a very simple exercise, now that teh warranty has gone, and Spring weather is arriving. Can always put the valve back in place. I bought one new open valve from Bavarian, so Ican rreuse tehold if needed. If I like it, I'll open up the old valve from the e93 and use that in the e61 - there are threads that show how easy it is to remove the internal restriction in the OEM valve and then reuse it.

SavvyByNature · 03-13-2012, 09:31 AM

Good point. I might as well do it as well alongside my 3-Intake mod.

03-12-2012, 02:44 PM	#1
mbsl98 Enlisted Member 4 Rep 41 Posts Drives: '08 328i convert; '07 530xiT Join Date: Feb 2012 Location: Natick, MA iTrader: (0)	CDV Delete - need right brake fluid I am getting ready to do the CDV delete on my e93, and then on my e61 if I like the result. The only piece I need is the right brake fluid to add to the BMW dealer installed fluid to top off. The car has pretty fresh fluid done a few months ago by BMW Gallery-Norwood under the 4 year coverage, so I am not planning on a full fluid flush. Can someone tell me just what fluid I can buy locally (AutoZone, etc) that will be 100% compatible? Thanks __________________ '08 328i convert, '07 530Xit wagon - twins with 6MT's, Ty Silver/Black leather, sport pack, sport seats, 18's, cold pack, PDK, etc., but only e61 wagon has iDrive/Nav, and only e93 has custom tune and Eisenmann exhaust.
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03-12-2012, 03:15 PM	#2
e90pilot Freight Dawg 104 Rep 2,103 Posts Drives: E90 325i Join Date: Jul 2005 Location: Oakland, CA iTrader: (3)	Anything DOT4 should be compatible. I think DOT3 is too but I'm not sure. If you want to be safe, you can just buy a bottle at the dealership. It's not that expensive. __________________ --Marcelo '06 Arctic Metallic 325i \| Sport Package \| 6MT \| Dinan Stage III suspension \| Dinan exhaust \| 330i manifold swap! Click here! \| Active Autowerke tune \| 135i Brake Calipers \| Deiselboost caliper brackets \| E46 M3 front rotors
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03-13-2012, 08:36 AM	#3
mbsl98 Enlisted Member 4 Rep 41 Posts Drives: '08 328i convert; '07 530xiT Join Date: Feb 2012 Location: Natick, MA iTrader: (0)	Dealer would be fine for such a small purchase, but it is a pain to get there while the parts dept. is open. Seems that it should be simple to buy a quart of good stuff at local store, just want to be sure I get compatability with dealer stuff - DOT 4, DOT 5, other? __________________ '08 328i convert, '07 530Xit wagon - twins with 6MT's, Ty Silver/Black leather, sport pack, sport seats, 18's, cold pack, PDK, etc., but only e61 wagon has iDrive/Nav, and only e93 has custom tune and Eisenmann exhaust.
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03-13-2012, 08:41 AM	#4
SavvyByNature First Lieutenant 21 Rep 270 Posts Drives: 2015 - SO M4 Join Date: Feb 2011 Location: Atlanta iTrader: (0)	Does the CDV delete make a big difference with the drivability?
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03-13-2012, 09:25 AM	#5
mbsl98 Enlisted Member 4 Rep 41 Posts Drives: '08 328i convert; '07 530xiT Join Date: Feb 2012 Location: Natick, MA iTrader: (0)	There are a lot of threads on the CDV delete, all saying that it makes the clutch much move satisfactory (firm and positive action). I am hoping that deleting teh valve removes the disconnected feel of clutch and makes it more like an old fashioned action where you can actually tell when it is at the engagement point, etc. I have never seen an authorative write-up as to why that valve is being installed by BMW, but it has been there for something like the last 10 years, I think. Roundel writers have said that it also causes faster wear of the clutch, versus a good clutch driver with no valve. In any case, it looks like a very simple exercise, now that teh warranty has gone, and Spring weather is arriving. Can always put the valve back in place. I bought one new open valve from Bavarian, so Ican rreuse tehold if needed. If I like it, I'll open up the old valve from the e93 and use that in the e61 - there are threads that show how easy it is to remove the internal restriction in the OEM valve and then reuse it. __________________ '08 328i convert, '07 530Xit wagon - twins with 6MT's, Ty Silver/Black leather, sport pack, sport seats, 18's, cold pack, PDK, etc., but only e61 wagon has iDrive/Nav, and only e93 has custom tune and Eisenmann exhaust.
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03-13-2012, 09:31 AM	#6
SavvyByNature First Lieutenant 21 Rep 270 Posts Drives: 2015 - SO M4 Join Date: Feb 2011 Location: Atlanta iTrader: (0)	Good point. I might as well do it as well alongside my 3-Intake mod.
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