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  1. #1
    1131 Adam E.'s Avatar
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    Piston Wash Evaluation Needed - GP1200

    What do you guys think of this wash on #3 (The first picture)? I just got this shortblock in. The engine turns over fine by hand but I haven't run compression numbers yet. I was told 120,120,120. Does it look lean to you want about the other pistons?

    Thanks,

    Adam
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  2. #2
    alex29573's Avatar
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    doesnt look like there is much wash on the bottom two

  3. #3
    WATER WOODY's Avatar
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    Adam, #3 is wet, the others are lean. I would start looking at your carbs. Any carb work done?

  4. #4
    1131 Adam E.'s Avatar
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    Quote Originally Posted by WATER WOODY View Post
    Adam, #3 is wet, the others are lean. I would start looking at your carbs. Any carb work done?
    Thanks for the input Kevin. I just received the engine and already have carbs here that have been cleaned and rebuilt. Are there any consequences of running the engine with the pistons like this?

    Adam

  5. #5
    I wanna go FAAAAASTer!! CDW78's Avatar
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    Hey Adam,
    is this the one you grabbed from the guy in NJ ? ( or who ever it was you had mentioned to me?) I decided another route..... Hope it worked out ok for you.

  6. #6
    1131 Adam E.'s Avatar
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    Quote Originally Posted by CDW78 View Post
    Hey Adam,
    is this the one you grabbed from the guy in NJ ? ( or who ever it was you had mentioned to me?) I decided another route..... Hope it worked out ok for you.
    Yeah it was him. So far so good, as long as everything here checks out I think I will be in good shape. I am going to get some compression numbers before I do anything. I owe him $320 for the trade, but will only pay if this thing is good to go.

    Adam

  7. #7
    Flying Scotsman's Avatar
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    If it was a trade make sure the crank is good and the cylinder bores.
    Pull the cylinders and see what they look like a and what the piston walls and rings look like.
    If theres no deto on the pistons or any obvious damage to the pistons then your golden lol.
    If the motor is torqued/sealed properly and you have your carbs set rich you will have nice wash real quick.
    Heres a pic of some wash
    Wash is on the outside edge on top of the piston.
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  8. #8
    Flying Scotsman's Avatar
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    Your 1st pic is a 760 piston and its relatively new compared to the other two.
    2 and 3 are originall pistons I would say and 1 is a new piston.

  9. #9
    I wanna go FAAAAASTer!! CDW78's Avatar
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    Hope it works out for you....
    I just didn't feel comfortable with the deal - even though it would have only cost me around $800 with the repairs it already needed.
    Seems like he was being straight with me about what it needed, which of course, is always good
    Thanks for hooking me up, either way!
    And I may have paid 2 times as much, but have a warranty to boot and no major work to do, just attaching everything and droppin' it in.

    You putting this in a GP1200 right ?

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