Question about 1999 Isuzu Amigo

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Broke timing belt at idle, I suspect valves are bent, but dont want to pull the head without being sure. I can get good compression readings by manually turning to each cylinder, syncing with cams. Now I have all the piston setting about 1/2 down the stroke. the exhaust cam spins fine with no noises when turning by hand. the intake makes a metal to metal (ping) sound on one lobe. The rest sound and spin normally. I havent pulled the valve cover off yet, any ideas of what could be going on here. Amigo ran good prior to the belt break at approx 700rpm under zero load on the engine. all the idlers, waterpump, belt, etc have less than 10k on them. Just seems weird for a belt with little sign of wear

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  • DMills
    DMills Oct 14, 2013

    it appears to be an interference engine, 2.2l isuzu gasoline engine.

  • GQ-ROD Oct 14, 2013

    then the head has to come off and check for damage to the valves and pistons, worse comes to worse just replace the whole engine.


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  • 635 Answers

Google to see if your engine is a non interference engine if it is then you are in good shape and did not bend any valves.

Posted on Oct 14, 2013

Testimonial: "Alright, so when the intake cam is spun by hand, it appears to almost get stuck while compressing the spring on that one lobe. Once you back off and then turn it again it will go around like normal, but makes a Ping sound when the valve closes. I guess the next step is to remove the valve cover, possibly a broken spring?"

  • GQ-ROD Oct 14, 2013

    correct possibly broken spring.


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For you to get a good look and be 100% of what it is YOU WILL HAVE TO REMOVE HEAD, I would more like suggest a burnt valve rather than a bent valve unless you broke the timing belt on this vehicle. Good Luck and contact if you need more help. Thanks for using FIX YA

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