Anyone use GM top end cleaner ???

Discussion in 'The Garage' started by MOLON LABE, May 3, 2006.

  1. MOLON LABE

    MOLON LABE Registered Member

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    I have a 1990 GMC Suburban 4x4 1500, 5.7 TBI
    I have heard of people using GM top end cleaner as preventative maintenance and for certain problems.
    Any thoughts on this and is it worth it to use it ?
    Also, how would you use it on my particular vehicle ?
     
  2. 1979jimmy350

    1979jimmy350 1/2 ton status

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    just go to the store and but seafoam it is the same thing, it really helps clean out the carbon in the intake tract
     
  3. JIM88K5

    JIM88K5 1/2 ton status

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    I have use both the spray & the pour type. Both work well.
     
  4. theperfectgarage

    theperfectgarage 1/2 ton status

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    Is it the same ? I have always believed GM's was a superior product. Same with EOS, that always gets dumped in my new rebuilds.
     
  5. MOLON LABE

    MOLON LABE Registered Member

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    So whats the best way to use it in my vehicle ?
    Run it through a vacuum hose etc...??
     
  6. JIM88K5

    JIM88K5 1/2 ton status

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    Pour it in the carb/tbi until it stalls and let it sit for 15 min. Fire it up pour the rest in, then you done.
     
  7. Diesel Dan

    Diesel Dan 1/2 ton status

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    It's been years since I've used top engine cleaner. But one thing comes to mind....smoke screen! Only thing I've seen smoke more was a Grand National on a road trip to burn the oil out of the exhaust after a turbo swap. Definetly seems too work. I also use EOS on all engine assemblies.
     
  8. zeroz400

    zeroz400 1/2 ton status

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    I thought GM stopped making that stuff? Maybe they just removed some chemicals. We used it on a couple of friends cars and trucks, smoothed out the idle and small improvement in mpg. Good stuff.

    Last year my Auto class ordered a whole bunch of that stuff because it was supposed to be discontinued, anyone got any info on this?
     
  9. 5280k5

    5280k5 1/2 ton status

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    As far as I know it's still available, we've used it at the dealership for years.
    You can pour it in the carb or throttle body like jim88k5 said, or pull off a vacuum hose w/manifold vacuum and suck it into the intake that way. we used to mix it 3=1 with gas and run it through injector cleaning canisters. most recently GM has had us filling cylinders and doing decarbon soakdowns , either way you use it Good stuff. oh yeah & enjoy the smoke show:D spy hunter anyone lol!!!
     

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