How deep is the vacuum side on the EGR passage??

cbrguy · 07-18-2012, 05:54 PM

I want to try and clean the one in the head on my 1999 SL2.

PlasticCarsRock · 07-18-2012, 07:13 PM

A piece of old speedometer cable, powered by a drill works well to clean out EGR passages. Often, simply starting the car for a few seconds with the EGR valve removed is enough to clean out the passages: there will be a massive vacuum leak through one, and an exhaust leak through the other, creating significant flow in both passages. The engine will rev pretty high due to the vacuum leak, but the rev limiter will prevent any damage. If that isn't sufficient, I'd try the speedometer cable.

07-18-2012, 05:54 PM	#1
cbrguy Member Join Date: Oct 2011 Location: White House, TN Posts: 292 2001 SC2 1997 SL2	How deep is the vacuum side on the EGR passage?? I want to try and clean the one in the head on my 1999 SL2. ... 04/17/13 2001 SC2 A, Blue 170k/171k 5/6/2013, burnt valves 06/30/12 1997 SL2 M, Red - parked 215k 10/29/11 1999 SL2 A, Blue 266k 12/09/12 2001 SL2 A, White 200k RIP

07-18-2012, 07:13 PM	#2
PlasticCarsRock Master Member Join Date: Dec 2005 Location: Brookline, MA Posts: 4,317 PlasticCarsRock's Photos 1995 SL2	Re: How deep is the vacuum side on the EGR passage?? A piece of old speedometer cable, powered by a drill works well to clean out EGR passages. Often, simply starting the car for a few seconds with the EGR valve removed is enough to clean out the passages: there will be a massive vacuum leak through one, and an exhaust leak through the other, creating significant flow in both passages. The engine will rev pretty high due to the vacuum leak, but the rev limiter will prevent any damage. If that isn't sufficient, I'd try the speedometer cable. ... High compression build: .033" shaved/ported head, flat-faced valves; gen3 rods, pistons, tie-plate; OE header, custom CAI, SDA street cams with adjustable sprockets, WBO2, SAFCII, LSD. ASE A1-A8+L1

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