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Overheated v70 V70-XC70 1998

posted by  RepairmanJackal on  Wed Nov 30 20:49 CST 2011
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last visit: Tue Jun 10 09:52 CST 2014
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I'm close to purchasing 1998 v70 Turbo that overheated. The seller is willing to give it to me at a low price (basically a bit above junkyard price).

I know that the car is mechanically identical to my c70. You may or may not know that I did a complete head gasket job on my c70 a few months back and learned quite a bit about the whiteblock engine from the experience.

I'm looking at a car that had a full-blow overheat. It's in awesome condition - low miles, great body and interior, but it lost coolant from the turbo drain and it led to a full-on overheat. The seller tells me that it's been garaged for x3 years.

There are good B5234T3 engines to be found around here and several junkyards. If I am *very* lucky this could be as simple as replacing the engine head. But worst case...

What else breaks on a B5234 when it looses coolant?

Someone mentioned engine bearings. I know that this engine cranks, but doesn't start. So maybe the bearings are still good?

Could the turbo be wrecked? What else could be wrong? Wasted cooling system parts? Anything else?

Worst case, it will be an excellent parts donor.

Thanks as always.








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    Overheated v70 V70-XC70 1998

    posted by  KlausC on  Wed Nov 30 23:12 CST 2011
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    last visit: Fri Oct 24 10:15 CST 2014
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    Of course, if the block overheated and the driver continued to drive, there could be compromises in the aluminum block. You won't find out until the engine is fixed enough to run and antifreeze is pouring out of the cracks.

    Most often, the red lights on the dash are enough to make the driver pull over and turn the key off, as well as seeing steam pour out of the bonnet.

    Klaus
    --
    Did you do your Random Act of Kindness today?








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      Overheated v70 V70-XC70 1998

      posted by  living in the past on  Thu Dec 1 05:47 CST 2011
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      last visit: Wed Jan 29 05:42 CST 2014
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      Hey
      Do as little as you can to make it run again and then see how it holds on.
      it could be a cooling fan malfunction sometimes caused by a faulty ecu not triggering the fan motor or my favorite a leaking hose.
      Don't jump for the head gasket without proof.

      while we are on the subject how warped can a white head be before planeing?
      I think they move a lot but being aluminum they may straighten out
      good luck








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        Overheated v70 V70-XC70 1998

        posted by  KlausC on  Thu Dec 1 10:51 CST 2011
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        last visit: Fri Oct 24 10:15 CST 2014
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        Which is why a compression test is needed, with oil added to the cylinders because the engine is cold and dry from sitting.

        As to warping, I would be more concerned about the block itself during an overheat. The aluminum head seldom warps, there is enough oil going through it to keep things 'cool'.

        According to the first writup, the coolant poured out of the turbo hose.

        If this were my car, I would fix the leak and fill the system with coolant. Pour a Tbsp of oil in each cylinder, get a good battery, and crank it!

        Klaus
        --
        Did you do your Random Act of Kindness today?








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    Overheated v70 V70-XC70 1998

    posted by  KlausC on  Wed Nov 30 21:13 CST 2011
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    last visit: Fri Oct 24 10:15 CST 2014
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    The crank bearings get hurt when the oil drains out, not when the antifreeze goes away. An overheat is usually the head, valves, and gasket (top end of engine). There is probably no compression. If the oil level is still near the top of the dipstick, the rings might be just fine.

    If the turbo ran out of coolant, it might have messed up bearings. I have seen turbos glow red hot and not have problems. Easy enough to check by taking off the air intake hose and feeling the turbine for wobblies.

    I thought it was getting too cold for projects.

    Klaus
    --
    Did you do your Random Act of Kindness today?







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