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post #1 of 7 Old 09-14-2020, 10:30 PM Thread Starter
Robert Worrall
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No compression

2007 Jeep Compass 2.4. Timing chain jumped a couple cogs. I put chain back on to the timing marks and re tightened and wanted to check compression before I ordered a new chain and tightener. There is no compression on any cylinder. Is it possible that it bent a valve on every piston

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post #2 of 7 Old 09-14-2020, 11:32 PM
Tarneg
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i had to look this engine up but it seems the pistons wont hit the valves but the valves will hit each other if the cams are turned independently of each other. this is only internet knowledge so grain of salt and all but if you have nothing then either they all hit each other or something else broke also and the next move is take the head off and see what up. (someone may have a cheat way to look from the top of the head without removing but i dont know it on this motor)
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post #3 of 7 Old 09-15-2020, 09:37 AM Thread Starter
Robert Worrall
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It has 2 camshaft so i don't think the valves would hit
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post #4 of 7 Old 09-15-2020, 10:12 AM
Kruzin
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If the cams aren't properly timed, the valves can hit each other if they open at the same time.

'09 JK Rubicon
'01 XJ Sport
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post #5 of 7 Old 09-15-2020, 10:15 AM
Fourtrail
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The valves are angled so if the cam shafts are out of phase with each other, then yes the valves can come in contact with each other.




80 CJ-5, 74 CJ-6, 56 CJ-5
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post #6 of 7 Old 09-15-2020, 11:22 AM Thread Starter
Robert Worrall
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Ok. I guess head is coming off.. thanks everyone
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post #7 of 7 Old 09-19-2020, 10:40 PM Thread Starter
Robert Worrall
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head is off and all intake valves are bent, exhaust valves look good, pistons dont look damaged, there are marks on all pistons for valves, must be like that from factory. now to source parts
should i install new head bolts,

Last edited by Robert Worrall; 09-20-2020 at 11:28 AM.
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