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Username Post: Cleaning the EGR valve        (Topic#181191)
John 
Dedicated Enthusiast
Posts: 7196
John
Age: 45
Loc: Montgomery, AL
Reg: 01-15-02
02-03-08 07:10 AM - Post#1357305    

A few years ago, one went bad on a Burb we had. I took it off and let it soak in carb cleaner or brake cleaner and put it back on and it was fine the rest of the time we had the truck. Now the one on the Impala is acting up and I can't remember what I used to clean the other one. What's best for the job?
1979 2wd K5 Blazer, 350/TH350
1985 4x4 M1009 K5 Blazer, 6.2/TH400


 
Low priced Genuine GM Auto Parts
someotherguy 
Moderator
Posts: 25649
someotherguy
Age: 44
Loc: Texas
Reg: 08-01-03
02-03-08 07:31 AM - Post#1357321    
    In response to John

Hey John, I figure carb cleaner would break up the gunk better than brake parts cleaner. Idunno; maybe there's no real difference - but it seems like brake parts cleaner evaporates faster?

Richard
94 C2500LD / 94 C1500 / 06 300C SRT8
Check out my truck shop projects


 
CDAUSA 
Needs to Get Out More Member
Posts: 12906

Loc: Texas Panhandle
Reg: 12-31-01
02-03-08 07:44 AM - Post#1357327    
    In response to John

John, carb cleaner does work better but I get even better results in soaking the cavity/plunger/seat with penetrant (even MMO ) for as long as you have time, brush lightly and then flush with carb cleaner, then you can use brake cleaner to remove everything.

 
John 
Dedicated Enthusiast
Posts: 7196
John
Age: 45
Loc: Montgomery, AL
Reg: 01-15-02
02-03-08 07:28 PM - Post#1357793    
    In response to CDAUSA

Mommy should be happy tomorrow, the CIL is off and the hesitation is gone. I decided to use all three. I soaked it in PB Blaster for over an hour then did the same thing with Gumout Carb Cleaner. After that I cleaned it up with brake cleaner and put it back on, it runs great now.

The weather's letting up, time to start on the K5...
1979 2wd K5 Blazer, 350/TH350
1985 4x4 M1009 K5 Blazer, 6.2/TH400


 
Boog 
Super Senior Member
Posts: 3536
Boog
Loc: Central Arkansas
Reg: 04-28-02
02-04-08 06:05 PM - Post#1358545    
    In response to John

I have seen warnings to not use "harsh" carb cleaners, or brake cleaners, etc as it can damage the egr diaphram. It's a standard disclaimer I think all the manufacturers use. Like you and so many other guys I have also used these type cleaners with good success. No failures yet.
Looks like Exxon-Mobil, and others, would put an additive in the gas to clean the egr system too don't you think? $40 Billion profit this last year. That's just plain obsene!
Boog
69 Chevy step
06 GMC ccsb Z71
00 GMC excab Z71
All GM...'nuff said!
JR Nation


 
John 
Dedicated Enthusiast
Posts: 7196
John
Age: 45
Loc: Montgomery, AL
Reg: 01-15-02
02-04-08 06:19 PM - Post#1358559    
    In response to Boog

Almost like they don't want you to know they can be cleaned.

Re: Exxon. Has a Texan been president too long? Sorry, that's a tin-foil hat comment more appropriate for Chit Chat.
1979 2wd K5 Blazer, 350/TH350
1985 4x4 M1009 K5 Blazer, 6.2/TH400


 
Boog 
Super Senior Member
Posts: 3536
Boog
Loc: Central Arkansas
Reg: 04-28-02
02-04-08 06:29 PM - Post#1358571    
    In response to John

That car doesn't have enough miles on it yet to be needing a cleaning does it?
I am knocking on wood with one hand and typing with the other when I say both my 97s are running fine and since I've had them have yet to have any trouble with the egr systems. One has 160,000 and the other has 180,000 miles. I won't keep them long enough to accumulate the miles Steve has on his 96 though!
Boog
69 Chevy step
06 GMC ccsb Z71
00 GMC excab Z71
All GM...'nuff said!
JR Nation


 
CDAUSA 
Needs to Get Out More Member
Posts: 12906

Loc: Texas Panhandle
Reg: 12-31-01
02-04-08 07:21 PM - Post#1358609    
    In response to Boog

They made an EGR change in 97, what, I'm not exactly sure of. Maybe an angle of seat change?



 
Capr87Elco70 
Very Senior Member
Posts: 1410

Age: 30
Loc: New York
Reg: 06-24-02
02-04-08 07:54 PM - Post#1358651    
    In response to John

I just used carb cleaner on mine and did a final rinse with water (not a lot)and then a blow from the air hose. Works fine. It was just stuck from carbon deposits.
-Shawn-
1965 Olds F-85 Deluxe
1983 Olds 98 Regency Brougham
1987 Caprice Landau Sport Coupe
1970 El Camino RIP 1-1-05


 
John 
Dedicated Enthusiast
Posts: 7196
John
Age: 45
Loc: Montgomery, AL
Reg: 01-15-02
02-04-08 08:14 PM - Post#1358679    
    In response to Capr87Elco70

Boog, it's an '01 with 125,000 on it. The one on the 96 Suburban acted up way sooner than that, it had 127,000 on it when we traded it.
1979 2wd K5 Blazer, 350/TH350
1985 4x4 M1009 K5 Blazer, 6.2/TH400


 
John 
Dedicated Enthusiast
Posts: 7196
John
Age: 45
Loc: Montgomery, AL
Reg: 01-15-02
02-06-08 04:30 PM - Post#1360217    
    In response to John

Short lived victory, the stumble and CEL is back.
1979 2wd K5 Blazer, 350/TH350
1985 4x4 M1009 K5 Blazer, 6.2/TH400


 
Boog 
Super Senior Member
Posts: 3536
Boog
Loc: Central Arkansas
Reg: 04-28-02
02-06-08 08:07 PM - Post#1360376    
    In response to John

Yeah, sometimes it's not the carbon buildup but the spring getting weaker causing a stumble. I've not looked at the newer ones. Is it still the spring/diaphram or linear type egr?
Boog
69 Chevy step
06 GMC ccsb Z71
00 GMC excab Z71
All GM...'nuff said!
JR Nation


 
John 
Dedicated Enthusiast
Posts: 7196
John
Age: 45
Loc: Montgomery, AL
Reg: 01-15-02
02-08-08 04:18 PM - Post#1361809    
    In response to Boog

I'm assuming spring type from what I saw when I had it off, but I really don't know. GRR! I thought I had it...
1979 2wd K5 Blazer, 350/TH350
1985 4x4 M1009 K5 Blazer, 6.2/TH400


 
Low priced Genuine GM Auto Parts
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