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Re: 2012 GMC Terrain 3.0L V6 Intake Valve Cleanup [Re: benjamming] #5282340 12/01/19 07:44 PM
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dblshock Offline
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You decide....

Honda 1.5 intake


05 Lexus GX470 175k
640:1 TCW-3
M1 0W40 XG-3614
Toyo Open Country H/T II

06 4Runner SR5 155k
640:1 TCW-3
M1 0W40 XG-3614
Falken Wildpeak AT3W
Re: 2012 GMC Terrain 3.0L V6 Intake Valve Cleanup [Re: benjamming] #5282359 12/01/19 08:07 PM
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spasm3 Offline
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The instructions for the CRC cleaner say to warm up the engine, and spray the entire can into the brake booster line while keeping the engine at 2k rpm. Let it sit an hour to soak the carbon and then drive at highway speed for at least 10 minutes.

Would the product stay on the valves better( less flash off) If you started out with the engine cold and sprayed it at the 2k rpm then let it soak? Would you not have less flash off and the solvent sit there longer?

The valves will still be warm from running for a minute or so at 2k, just not as hot as fully warmed up.

Last edited by spasm3; 12/01/19 08:08 PM.

13 elantra 81k 5w30 synpwr
03 chevy avalanche 83k synpwr 5w30
17 mazda cx-5 17000 miles synpwr 5w30
Re: 2012 GMC Terrain 3.0L V6 Intake Valve Cleanup [Re: benjamming] #5282687 12/02/19 08:45 AM
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Ez off oven cleaner will clean hard carbon. Used with care, it’s about the most effective carbon-eater.


People who count on their fingers should maintain a discreet silence.
Re: 2012 GMC Terrain 3.0L V6 Intake Valve Cleanup [Re: benjamming] #5282879 12/02/19 12:15 PM
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BMWTurboDzl Offline
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Walnut blast on high mileage because I'd worry that any cleaner would send a slug of carbon into the cats thereby fouling them. Cleaners are probably ok if used as part of a maintenance regimen (ex, every 25k miles).


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

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Re: 2012 GMC Terrain 3.0L V6 Intake Valve Cleanup [Re: BMWTurboDzl] #5282882 12/02/19 12:19 PM
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supton Online Content
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Originally Posted by BMWTurboDzl
Walnut blast on high mileage because I'd worry that any cleaner would send a slug of carbon into the cats thereby fouling them. Cleaners are probably ok if used as part of a maintenance regimen (ex, every 25k miles).

Why would one need a regimen of cleaners? I've not run many vehicles past 200k but those have not gotten cleaners, certainly not on a regular basis.


2011 Toyota Camry, base, 2.5L/6MT, 200k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 157k, ours
1999 Toyota Camry LE, 2.2L/4AT, 220k, his
Re: 2012 GMC Terrain 3.0L V6 Intake Valve Cleanup [Re: supton] #5282892 12/02/19 12:33 PM
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JTK Offline
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Originally Posted by supton

Why would one need a regimen of cleaners? I've not run many vehicles past 200k but those have not gotten cleaners, certainly not on a regular basis.


Were any of them direct injected?

I'm with you in that I've never had a vehicle that required a "cleaning" either, but DI's are a whole nother deal.


2019 Nissan Pathfinder SV
2017 Ram 1500 4x4, 3.6L.
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Re: 2012 GMC Terrain 3.0L V6 Intake Valve Cleanup [Re: JTK] #5282906 12/02/19 12:50 PM
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supton Online Content
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Originally Posted by JTK
Originally Posted by supton

Why would one need a regimen of cleaners? I've not run many vehicles past 200k but those have not gotten cleaners, certainly not on a regular basis.


Were any of them direct injected?

I'm with you in that I've never had a vehicle that required a "cleaning" either, but DI's are a whole nother deal.

True that, none were DI. Oh wait--my diesel was a DI, but lemme guess, that doesn't count. wink

Great, now people are going to swarm in and tell me I'm a Luddite for not having any DI's, right? That I'd be better off getting 3 more mpg but having to do 5k OCI's and run some cleaners every 25k, 'cuz that's better for the enviroment?

Eh. Now I'm missing that ole TDi, NOx emissions or not. Oh well. Every technology has its teething issues; DI has come a long ways and isn't quite the scary thing it used to be. And technically engines have been gumming up / carboning up for a long time prior to DI. TDi's especially!


2011 Toyota Camry, base, 2.5L/6MT, 200k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 157k, ours
1999 Toyota Camry LE, 2.2L/4AT, 220k, his
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