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  1. 1

    5.7L V8 Engine lock/clunk problem

    Cheers, will do 👍
  2. 1

    5.7L V8 Engine lock/clunk problem

    I’m the same! Do I already did a new starter on the rebuild. So I think I have some progress. - First of all I added a mini 12V circ pump in the jet water pump line. I found at idle, the jet doesn’t push much water through and the theory being such low pressure in the block it just wasn’t...
  3. 1

    5.7L V8 Engine lock/clunk problem

    Doesn’t at all. It’s not Hydrolocked, already tested
  4. 1

    5.7L V8 Engine lock/clunk problem

    That’s a great idea! Thank you, I will try that next time it happens. Sort of makes sense with what you have described. Really appreciate it. Fingers crossed.
  5. 1

    5.7L V8 Engine lock/clunk problem

    The starter doesn’t turn. It’s like it tries too, but just clunks like its stopped or restricted, the t makes no sound after that. Release the key, and try again, same clunk. Starts sometimes If you hold the key longer and forces a start (like more Amos are drawn). Engine runs off two heavy...
  6. 1

    5.7L V8 Engine lock/clunk problem

    Thanks. No IR gun but I have a mechanical gauge into one of the thermostat sensor holes and that remains often under 140F. The max the temp has risen on OFF is 167F Pulled all plugs, no water, spark colour looks good and oil clean (not milky). We’ve been up the river skiing for a week and it has...
  7. 1

    5.7L V8 Engine lock/clunk problem

    (Middle of intake manifold bolt to block opposite site to temp sensor)
  8. 1

    5.7L V8 Engine lock/clunk problem

    I have a digital sensor bolted directly to a head bolt on the engine
  9. 1

    5.7L V8 Engine lock/clunk problem

    Hi Guys - first question here so hope someone can help. I have a MerCruiser 5.7L MIE GM 350 V-8 1988 rebuilt recently. Dipped and new rings, etc. Starts and runs beautifully, except on a number of occasions if you turn off the motor on the water, particularly after a hard run, the motor feels...
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