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Old 07-18-2004, 05:26 PM   #1 (permalink)
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Default what are symptoms of bad pistons???

i may need new pistons so could you all please let me know what some symptoms of poor pistons are.
I was getting a bad knock (not lifters) above 3000 rpms and now getting it all the time just less audible below 3000 rpms. A while ago i had a washer fall down the intake and was bouncing around for a while and my mechanic told me that the pistons were kind of beat up but not to really worry about that right now. BUt time went on and now it seems to be a problem.
Let me know what you think

Also,
How hard is it to swap out the pistons for stock size pistons for someone who knows pretty much what they are doing?
thanks
-Steve
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Old 07-18-2004, 05:43 PM   #2 (permalink)
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Default Re: what are symptoms of bad pistons???

Quote:
Originally Posted by widow maker
i may need new pistons so could you all please let me know what some symptoms of poor pistons are.
I was getting a bad knock (not lifters) above 3000 rpms and now getting it all the time just less audible below 3000 rpms. A while ago i had a washer fall down the intake and was bouncing around for a while and my mechanic told me that the pistons were kind of beat up but not to really worry about that right now. BUt time went on and now it seems to be a problem.
Let me know what you think

Also,
How hard is it to swap out the pistons for stock size pistons for someone who knows pretty much what they are doing?
thanks
-Steve
Your mechanic is terrible. If washer falls down and scrapes your pistons, even a little bit, then they develope absurd hot spots and knock when they arn't supposed and destroy themselves really fast. Your mechanic doesn't know much about turbo cars it seems.

Grab a Boroscope (coolest tool ever) and take a look at your pistons. I imagine they look awesome, if they are broken. You could also do a compression test, and see if your numbers are fucked up.

Changing them isn't impossible. If you dropped a washer in your intake itrs likely bad things are happening, so you might as well just pull the engine (takes 5ish hours the first time), and take it apart. You'll need to do this to get it re-honed when you replace the pistons anyway.

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Old 07-18-2004, 07:34 PM   #3 (permalink)
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Default Re: what are symptoms of bad pistons???

I don't know. My mechanic is Ray Pampena ( a very respected mechanic). The washer situation has been taken care of. He said it may develop a problem later on because of the damage to the pistons which were very minimal at the time.
Do I need to pull the engine? Do the cylinders NEED to get rehoned? I do not have access to a cherry picker or anything. Thanks for the reply
-Steve
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Old 07-18-2004, 09:10 PM   #4 (permalink)
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Default Re: what are symptoms of bad pistons???

If your pistons are bad, they'll look like mine used to!
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Old 07-19-2004, 12:22 AM   #5 (permalink)
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Default Re: what are symptoms of bad pistons???

Quote:
Originally Posted by widow maker
I don't know. My mechanic is Ray Pampena ( a very respected mechanic). The washer situation has been taken care of. He said it may develop a problem later on because of the damage to the pistons which were very minimal at the time.
Do I need to pull the engine? Do the cylinders NEED to get rehoned? I do not have access to a cherry picker or anything. Thanks for the reply
-Steve

You can borrow my engine hoist hopefully i will not need it to soon.
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Old 07-19-2004, 02:03 PM   #6 (permalink)
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Default Re: what are symptoms of bad pistons???

Quote:
Originally Posted by TTmitsu
You can borrow my engine hoist hopefully i will not need it to soon.
hey great. Have you ever pulled your pistons and changed them before? I could use all the help I can get if you are willing to give me a hand.
-Steve
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Old 07-19-2004, 02:26 PM   #7 (permalink)
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Default Re: what are symptoms of bad pistons???

Why don't you ask Ray? I'm sure he'll give you the best answer.
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Old 07-19-2004, 02:48 PM   #8 (permalink)
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Default Re: what are symptoms of bad pistons???

Quote:
Originally Posted by widow maker
hey great. Have you ever pulled your pistons and changed them before? I could use all the help I can get if you are willing to give me a hand.
-Steve
no my engine got a full rebuild at a machine shop, i have pulled my engine out of my car though and ill definately give you a hand with that if you need it. my # is 351-2321 call me when your ready. i accept payment in cold beer
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Old 07-19-2004, 02:55 PM   #9 (permalink)
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Default Re: what are symptoms of bad pistons???

Quote:
Originally Posted by TTmitsu
no my engine got a full rebuild at a machine shop, i have pulled my engine out of my car though and ill definately give you a hand with that if you need it. my # is 351-2321 call me when your ready. i accept payment in cold beer
haha,,, Beer I can do!
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Old 07-19-2004, 02:56 PM   #10 (permalink)
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Default Re: what are symptoms of bad pistons???

Quote:
Originally Posted by SkortchGT
Why don't you ask Ray? I'm sure he'll give you the best answer.
I will,,, it's just that he is out of town at the NG so I am trying to do some research before he gets back. I can't get a hold of him until tuesday.
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