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Evo 8 crank won't make full rotation

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Old May 14, 2018, 06:41 PM
  #16  
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The motor won't spin with the timing belt off. Valves are open and will hit.

Line up timing marks, install and tension timing belt, turn it over with hand tools, see what happens.

Position the crank so the pistons are all sitting in the middle of the bore, the get the cams line up, and then you'll be able to bring #1 to TDC. You'll also need to verify the front balance shaft is positioned correctly by pulling the bolt/plug on the front (turbo side) of the block, and stick screw drivers in there.
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Old May 17, 2018, 10:07 AM
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Just figured it out. My exhaust can spin freely and I realized that wasn't right. Pulled the valve cover and all the lifters had been thrown off of it. I guess a bent valve or it threw timing and threw all of them off
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Old May 17, 2018, 02:09 PM
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Originally Posted by Evo_8_power
Just figured it out. My exhaust can spin freely and I realized that wasn't right. Pulled the valve cover and all the lifters had been thrown off of it. I guess a bent valve or it threw timing and threw all of them off
Check that camshaft and see if it's bent
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Old May 17, 2018, 04:55 PM
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Originally Posted by Evo_8_power
Just figured it out. My exhaust can spin freely and I realized that wasn't right. Pulled the valve cover and all the lifters had been thrown off of it. I guess a bent valve or it threw timing and threw all of them off
Lifters? Or rockers?
Lifters don't come out easily.
definitely check your cams and cam caps to extra wear where it's oval.
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Old May 17, 2018, 05:00 PM
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Valves contacted pistons and won't open further, putting pressure back on cam lobes, which kept turning. Lifters held it's position like it was designed to do and the rockers popped out to relieve the pressure. Valves are likely all bent, cams could have indentation in lobes. Hopefully cam caps didn't suffer because I don't think you can find replacements without buying whole head.
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Old May 29, 2018, 03:27 PM
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Sorry yes it was the rockers. And I'm just rebuilding the whole head. The lifters, cams, and rockers are all scratched
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Old May 29, 2018, 04:02 PM
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Originally Posted by Evo_8_power
Sorry yes it was the rockers. And I'm just rebuilding the whole head. The lifters, cams, and rockers are all scratched
Are you replacing them all with new oem parts?
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Old May 29, 2018, 06:07 PM
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Originally Posted by 2006EvoIXer
Are you replacing them all with new oem parts?
nah aftermarket. Been pricing everything out now. Just fully rebuilding the whole head
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Old May 29, 2018, 09:38 PM
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Originally Posted by Evo_8_power


nah aftermarket. Been pricing everything out now. Just fully rebuilding the whole head
Who is building your head? Are they cutting new valve seats? 3 angle?
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Old May 29, 2018, 09:40 PM
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Also, are your valves bent?
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Old May 30, 2018, 10:21 AM
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Originally Posted by 2006EvoIXer
Also, are your valves bent?
I'm going to find out this weekend if the valves are bent. I was going to rebuild myself but I'm not having second thoughts. May send it into map to have it rebuilt
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Old May 30, 2018, 01:13 PM
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Originally Posted by Evo_8_power
I'm going to find out this weekend if the valves are bent. I was going to rebuild myself but I'm not having second thoughts. May send it into map to have it rebuilt
DO NOT send it to MAP. They are a joke among jokes.

A quality local machine would be far better than sending it to MAP. If you want a something high performance, Headgames is a great option.
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Old May 31, 2018, 09:29 AM
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Originally Posted by letsgetthisdone
DO NOT send it to MAP. They are a joke among jokes.

A quality local machine would be far better than sending it to MAP. If you want a something high performance, Headgames is a great option.

oh wow thanks. That's good to know. I'll look around locally and if I can't find anybody I'll check them out
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Old Jun 17, 2018, 08:33 AM
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So if anybody is wondering what happened. I got the head off. And this is what it looked like. I'm sorry I know the pictures aren't great it started getting dark. I can get better ones later
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Old Jun 17, 2018, 11:25 AM
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That looks pretty epic, you should definitely post in the engine failure thread. https://www.evolutionm.net/forums/ev...ne-thread.html
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