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Thread: Dodge 4.7 V8, known for dropping seats?

  1. #1
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Dodge 4.7 V8, known for dropping seats?

    I have an 01 Grand Cherokee in my shop, with no compression in #1, traced to a burned intake valve or it dropped seat, took the intake off and yep, valve seat done. I've read ton's of horror story's of sludge and the odd cracked head but nothing about valve seats. I have no history on it and it doesn't appear to have been overheated, full of coolant, no blown head gaskets and doesn't have the typical smell of an overheated engine. Thanks.
    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)
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    turbo addict
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    Re: Dodge 4.7 V8, known for dropping seats?

    got some extra lifters i can have??????

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    Re: Dodge 4.7 V8, known for dropping seats?

    Quote Originally Posted by bakes View Post
    got some extra lifters i can have??????
    Not unless Rob says you can have them, lol.
    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.
    1989 Mini-me turbo Caravan, going for the van record, NO NOS!

    Aurora ignition wires for sale. Link to info

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

    TIII adapter plates for a dizzy.Link to info.

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    turbo addict
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    Re: Dodge 4.7 V8, known for dropping seats?

    dam!!!!!!!

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    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: Dodge 4.7 V8, known for dropping seats?

    Although, 8 could be faulty!
    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.
    1989 Mini-me turbo Caravan, going for the van record, NO NOS!

    Aurora ignition wires for sale. Link to info

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

    TIII adapter plates for a dizzy.Link to info.

  6. #6
    turbo addict
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    Re: Dodge 4.7 V8, known for dropping seats?

    Quote Originally Posted by turbovanman View Post
    Although, 8 could be faulty!
    I smell a supper 60 cam going in

  7. #7
    Moderator Turbo Mopar Staff 135sohc's Avatar
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    Re: Dodge 4.7 V8, known for dropping seats?

    Mom managed to overheat our 02 Ram 4.7 pretty good little while back. Crossing fingers its still going strong...

    Maybe just a random occurance you've had ?

  8. #8
    Garrett booster
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    Re: Dodge 4.7 V8, known for dropping seats?

    I know they've been known to break valve springs. I've got an '04 Grand Cherokee right now with a broken spring on #6 intake. Luckily the valve didn't drop down far enough to hit the piston. IDK about seats dropping, though.

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    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: Dodge 4.7 V8, known for dropping seats?

    Valve spring is just fine. You can see where the seat cracked in 2, which is either what caused it to drop or the poundage of the valve?

    I'll try to find a camera to snap pics.
    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.
    1989 Mini-me turbo Caravan, going for the van record, NO NOS!

    Aurora ignition wires for sale. Link to info

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

    TIII adapter plates for a dizzy.Link to info.

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    The moderately moderate moderator Turbo Mopar Staff black86glhs's Avatar
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    Re: Dodge 4.7 V8, known for dropping seats?

    I have read a couple things about the seats, but i don't know if it is considered a problem. I have read the Dodge issued a bulletin or update talking about oil getting cooked to the heads because of too much heat in that area.
    Also saw one for updated the rockers (IIRC) that flow more oil to the cam and valvetrain.
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    Re: Dodge 4.7 V8, known for dropping seats?

    Got the head off, F*CK Dodge, why couldn't you make the wiring harness removable for the passenger head.

    Anyhow, no head gasket leaks, or signs of head cracking, just a dropped seat and some slight piston damage.
    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.
    1989 Mini-me turbo Caravan, going for the van record, NO NOS!

    Aurora ignition wires for sale. Link to info

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

    TIII adapter plates for a dizzy.Link to info.

  12. #12
    boostaholic
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    Re: Dodge 4.7 V8, known for dropping seats?

    My Durango has a 4.7. I am not looking forward to working on that engine. I hear its a real pain. At 100k, The only issue so far was exhaust manifold bolts snapping numerous times. The only other issue is every once in a while it gets a glitch where it sounds like it is loading up. It will start idling like a dragster, Really lopey for a minute then stops.

  13. #13
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    Re: Dodge 4.7 V8, known for dropping seats?

    As many things ive seen of the 4.7L (parts wise) im pretty sure its an engine to stay away from. Could be wrong but its really a common engine around here thats failing.

  14. #14
    Garrett booster
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    Re: Dodge 4.7 V8, known for dropping seats?

    I've seen it on both the 4.7 and 3.7 V6. Mostly due to overheating causing the head to warp enough to drop the seat. I replaced a 3.7 in a Liberty because it got soo hot it dropped 3 seats and trashed the motor. Used 3.7's arn't cheap either, almost as bad as the 2.7's-$1,800-$2,000 range

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    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: Dodge 4.7 V8, known for dropping seats?

    Quote Originally Posted by Matt86 View Post
    I've seen it on both the 4.7 and 3.7 V6. Mostly due to overheating causing the head to warp enough to drop the seat. I replaced a 3.7 in a Liberty because it got soo hot it dropped 3 seats and trashed the motor. Used 3.7's arn't cheap either, almost as bad as the 2.7's-$1,800-$2,000 range
    I had one in here, a 3.7 Lib, rad cracked and she didn't know, motor melted, literally, but this one, absolutely no signs of overheating.

    Had a tough time finding a good engine, learned alot about the various year engine changes due to my wrecker using me as the guinea pig,
    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.
    1989 Mini-me turbo Caravan, going for the van record, NO NOS!

    Aurora ignition wires for sale. Link to info

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

    TIII adapter plates for a dizzy.Link to info.

  16. #16
    Supporting Member Turbo Mopar Contributor
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    Re: Dodge 4.7 V8, known for dropping seats?

    The 4.7 is a good engine. It does NOT like to be overheated at all. I haven't seen any problems with them since I have been at a dodge dealer for close to a year.
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  17. #17
    Hybrid booster
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    Re: Dodge 4.7 V8, known for dropping seats?

    a little hint yes the head guy said real comon on the 3.7 to drop seats so i guess 4.7 having two more cyc will happen too.i found out that after you get the chains back on that no mater how many times you turn it over the marks will never and i mean never line back up.it notes this in the factory sev. man.left or right head cause intake has to come off anyway.

  18. #18
    Hybrid booster Turbo Mopar Contributor
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    Re: Dodge 4.7 V8, known for dropping seats?

    Makes me nervous now to read about some issues with the 4.7. My '01 Dakota has 102,000 miles and it's still has about 95% original parts on it. The engine has never been touched. Am I on borrowed time? I've used Mobil 1 since it was brand new and change the oil every 5K miles or 6 months, whatever comes first.

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    turbo addict boost geek's Avatar
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    Re: Dodge 4.7 V8, known for dropping seats?

    From what I've heard, if you don't overheat your 4.7 and change your oil regularly, your engine can last a LONG time.
    [SIGPIC][/SIGPIC]stock rebushedT2 rods big valve G head 1 ya,IIM still aliveI need an auto tranny i

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    Supporting Member Turbo Mopar Contributor
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    Re: Dodge 4.7 V8, known for dropping seats?

    Quote Originally Posted by neongary View Post
    Makes me nervous now to read about some issues with the 4.7. My '01 Dakota has 102,000 miles and it's still has about 95% original parts on it. The engine has never been touched. Am I on borrowed time? I've used Mobil 1 since it was brand new and change the oil every 5K miles or 6 months, whatever comes first.
    You will be fine.
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    "I don't always drive beaters, but when I do, I make sure that they're turbocharged. Stay boosted, my friends."

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