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Newbie headgasket question

Discussion in '80-Series Tech' started by KingOfFools, Aug 23, 2006.

  1. KingOfFools

    KingOfFools

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    Hello all, I have just purchased a 93 80 series, and have a couple of questions. After lurking around here for a few days, I've noticed the 4.5s seem to have some issues with headgaskets. The truck I just got has a busted piston skirt (ran with no oil), and needs a motor, I have one at the shop that supposedly only has 40k mi on it, and I'm wondering if it makes sense to go ahead and put a headgasket on it while its out of the truck, or leave it be. My other question, is there anything besides the usuall water pump, thermostat, rear main ect that I should be doing to this motor before it goes in? I have 10 years in the automotive field, done plenty of 3.0 v6s, but this is my first 4.5. Thanks in advance, James.
     
  2. cruiserdan

    cruiserdan SupportingVendor Emeritus Moderator

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    If you have an engine out of the frame I would stick a head gasket in it in a heartbeat. I do not think a 40K motor would need a water pump But I would pull the oil pans and re-seal them and put front and rear crank seals in it.
     
  3. KingOfFools

    KingOfFools

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    Thanks for the quick reply! I guess I know what I'm doing this weekend. The water pump on the motor that I got just looks terrible, it had been sitting for a long time, and for $50 bucks, I figured why not. The oil pans are almost done now, I would kick myself if I had to do the upper in frame. Anything else I should be looking for?
     
  4. tarbe

    tarbe

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    I thought a Toyota water pump was closer to $180??
     
  5. cruiserdan

    cruiserdan SupportingVendor Emeritus Moderator

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    50 bucks does not a factory water pump buy.
     
  6. KLF

    KLF Frame waxer SILVER Star

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    Do not pass Go, do not collect $200, and DO NOT put an aftermarket water pump on your engine. DON'T DO IT.

    And I wouldn't even hesitate, put a HG in that thing before you plop it in the truck.
     
  7. KingOfFools

    KingOfFools

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    World Pac is a wonderful thing. My cost on an OEM pump is right around $56. Its one of the few advantages of turning a wrench for a living. The only reason I bought a used engine instead of a reman was for the Toyota parts. They built it right the first time, and god only knows what jasper or atk put in their rebuilds. I will only use OEM stuff, unless its a straight up mod or upgrade. Thanks for all the advice, it will definitely be getting a head gasket this week.
     
  8. IdahoDoug

    IdahoDoug

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    Definite PHH, check the EGR hoses and the intake s/b cleaned (has EGR orifice that throws a code later..). Get new aluminum O rings to mate the exhaust to the manifolds - they are crushable type. I'd also replace all the firewall heater hoses with the PHH. Starter contacts would not hurt, and fresh heat insulation on the thick wire bundle that loops by the EGR valve is long term insurance.

    DougM
     
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