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Thread: Knock, knock. Who's there? It's me, Bottom End Knock!

  1. #1
    turbo addict Turbo Mopar Contributor Dave's Avatar
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    Knock, knock. Who's there? It's me, Bottom End Knock!

    Kind of confused here on what it really is.

    Here's the rundown. I've replaced the intermediate shaft after shearing the teeth off last summer. Replaced the oil pump with a Melling, the rod bearings with Clevites. I also took out the balance shafts, cut the chain, and plugged the hole. Bottom end is completely stock with 110,000 miles.

    I've been pushing 18-19psi lately and it's been knocking since. Or so I think. Once started it knocks like a bunch of midgets inside my oil pan with little hammers. After warmed up it knocks a lot quieter and a lot less in 1st gear once given gas. If I get into the gas higher and higher the knock goes away. Also, in 3rd gear if I give it some gas it sounds like a chain rattle until I get into the boost.

    Any ideas?

    BTW this chain rattle has always been there since removing the balance shafts.

  2. #2
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: Knock, knock. Who's there? It's me, Bottom End Knock!

    Sounds like good old piston slap or wrist pins are worn.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

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  3. #3
    turbo addict Turbo Mopar Contributor Dave's Avatar
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    Re: Knock, knock. Who's there? It's me, Bottom End Knock!

    Quote Originally Posted by turbovanman
    Sounds like good old piston slap or wrist pins are worn.
    Yay!!!!

    Hopefully it'll last me until fall.

    What's the weird chain rattle sound that develops only in 3rd gear?

  4. #4
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: Knock, knock. Who's there? It's me, Bottom End Knock!

    Quote Originally Posted by Dave



    What's the weird chain rattle sound that develops only in 3rd gear?

    Not a clue. Need to hear it to be of anymore help.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  5. #5
    turbo addict Turbo Mopar Contributor Dave's Avatar
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    Re: Knock, knock. Who's there? It's me, Bottom End Knock!

    How much damage can piston slap cause? I really don't want to rebuild this motor. My goal is to just build the 2.4.

  6. #6
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: Knock, knock. Who's there? It's me, Bottom End Knock!

    Quote Originally Posted by Dave
    How much damage can piston slap cause? I really don't want to rebuild this motor. My goal is to just build the 2.4.
    Not much unless it gets really noisey, then the piston can actually rock so bad in the bore, it will break.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

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