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Overheated, lost all coolant and Oil B230 SOHV 700 1990

posted by  labadida on  Tue Apr 19 12:00 CST 2005
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last visit: Fri Dec 11 23:58 CST 2009
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Hello all, not my brightest day today, my beautiful 740 of 10 yars started smoking today on the highway. I stopped at the next exit and had her towed, here is what I found...I lost all coolant and oil, I replaced both and started her after turing over maybe five cranks, coolant came out the bottom of the water pump and some oil trickled out of the top end behind the top timing gear, the rear timing belt cover literally melted to the block and partially melted the top and lower front covers. I want to fix her, she has every bit of 280k but ran strong all the way until today. I did not find any antifreeze in the oil, would this mean that I did not blow the head gasket? Is there an oil seal behind the timing gear that may have blown? I know there was an oil leak at the right front corner of the valve cover that was increasing for the past 7 months. In regards to replacing the rear timing belt cover; any advice on how to get the top and bottom timing gears off and successfully back on without messing up the timing? I removed the water pump and got a new one, I pulled a top timing belt cover from the JY and now need the bottom and rear ones. Any advice would be appreciated and if anyone has the lower and rear covers, I would be interested!
Thanks so much, Noel Smith Morrow, Ohio








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    Overheated, lost all coolant and Oil B230 SOHV 700 1990

    posted by  Steve on  Tue Apr 19 15:37 CST 2005
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    last visit: Fri Oct 24 07:16 CST 2014
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    My advice is say goodbye to this engine and look for a junkyard drop in. The replacement engine will cost $500 or so, about what you'll pay for parts on a very questionable engine.








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    Overheated, lost all coolant and Oil B230 SOHV 700 1990

    uid 17648's pic
    posted by  Shifted on  Tue Apr 19 14:12 CST 2005
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    last visit: Sat Nov 19 19:05 CST 2011
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    I hate to be the one to break it to you but if the engine got hot enough to blow smoke and melt the TB cover you may have a bit of a mess...
    The B230's do not take well to overheating, see other posts and the FAQ's here for more. Unless you are *very* lucky you are looking at a head gasket, at least, probably a warped head and if you drove long enough hot, one or more partially melted piston. If you went long enough without oil then your engine bearings are most likely toast as well. That smoke you saw behind you was oil burning off as the pistons were literally tearing out the cylinder walls as you drove; this does not bode well for a quick fix on this one.
    The oil/coolant thing means next to nothing with these, the gasket usually lets go between the cylinders and no mixing occurs.
    What did the temperature guage indicate by the time you shut the engine off, and how did it sound when you started it back up (at least it started...)? Is there a turbo?
    Maybe I am an alarmist, hopefully you can pull her through... If you do you will want to replace all three seals in the front, and a new timing belt, etc...see more in the FAQ's.
    The good news, used engines in very good condition can be had for a song, there should be no reason to fear the future of your beloved Brick.
    We never do.
    Good luck,

    Shifted
    --
    '87 745t 217,000; '93 Toyota MkII; '73 Suzuki Jimny (Brute) LJ20 360cc








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      Overheated, lost all coolant and Oil B230 SOHV 700 1990

      posted by  labadida on  Tue Apr 19 14:27 CST 2005
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      last visit: Fri Dec 11 23:58 CST 2009
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      Hi Shifted, Well, I don't like the sound of this! However, the engine started up after five cranks and sounded normal, just water coming from the blown water pump an oil from the leaking oil seal. I hope I can salvage this, I will look at the FAQ's and hope to get more responses on this and how best to get those timing gears off and back on succesfully! Any tips on that would be appreciated.
      Take Care, Noel








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        Overheated, lost all coolant and Oil B230 SOHV 700 1990

        uid 17648's pic
        posted by  Shifted on  Tue Apr 19 14:53 CST 2005
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        last visit: Sat Nov 19 19:05 CST 2011
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        More reading:
        http://www.brickboard.com/FAQ/700-900/EngineMechanical.htm#Failure_of_Harmonic_Balancer
        http://www.brickboard.com/FAQ/700-900/EngineMechanical.htm#FailureofLowerTimingSprocket
        You will have to get past these, although yours are not failed there are good tips here.
        If you are careful you can remove the timing belt without disturbing the timing, but as long as you are into it this far I again recommend replacing the timing belt and tensioner, as they were subject to extreme temperatures also. Resetting the timing is quite easy, and a new belt will have the added benefit of being marked to align with the timing marks on all sprockets in their proper postion.
        If you have access to a compression tester you might do a quick check before you remove the timing belt, that will tell you a great deal about the internal condition of your engine before you spend a lot on a shot in the dark rescue.

        Shifted
        --
        '87 745t 217,000; '93 Toyota MkII; '73 Suzuki Jimny (Brute) LJ20 360cc








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          Overheated, lost all coolant and Oil B230 SOHV 700 1990

          posted by  labadida on  Tue Apr 19 16:05 CST 2005
          Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
          last visit: Fri Dec 11 23:58 CST 2009
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          Thanks or all this info Shifted, I will check the compression first then follow up with the seals, cover, belt, tensioner and water pump. I will post after all this is done, probably next week sometime. I appreciate support and encouragement on this dreary Volvo day! Take care, Noel







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