06-06-2012, 09:24 PM #1
I need to know how to check for a bent rod before tommarow!!! HELP!
I'm building a 06 rxt motor that broke a timing chain.
Timing chain broke
9 flywheel teeth broke
10 valves bent.
I am installing new bolts, gaskets, timing chain, valves, flywheel.
I want to get it running tomorrow but need to know how to check for a bent valve.
A sea doo mechanic told be to check that 1 piston was at TDC every 120 deg of crank rotation. I did that but it seems to me that if a rod was bent it would still read like that?? also I checked the piston height to the deck and all 3 pistons where with in 3-4 thousandths of each other.
I think they are ok but would like to make sure!
How Do I know for sure they are good? or do I just wait for the bang at 8000 rpm??
06-06-2012, 09:46 PM #2
Do u have a caliper? Make sure it's within spec.
06-06-2012, 09:58 PM #3
If in question...... have them checked thoroughly, or REPLACE!!!
06-06-2012, 11:52 PM #4
Can they be checked inside the short block? or do they need to be removed?
06-06-2012, 11:52 PM #5
has anyone ever bent a rod when they lost a timing chain??
06-07-2012, 07:46 AM #6
06-07-2012, 09:13 AM #7
There is really no way to know for sure unless you visually check them out, like in your hand....compare them side by side and take measurements with a caliper. Otherwise your just going to take your chances, There is no other way so stop looking for short cuts, they do not exist!!!!!
06-07-2012, 09:32 AM #8
Did you take apart the oil pump's and look for damage mine were trashed after the chain broke tore up inside and mine was just idling when it broke.
06-07-2012, 11:34 AM #9
Yea flushed the pan/motor pulled the screens and pumps.
I'm not really looking for a short cut I just did not know how for sure to check them.
but yes if there was a easy way then I would be all for that. I sounds like there is not a easy way.
06-07-2012, 11:36 AM #10
If one got bent that one would be shorter. so the piston at TDC would be lower than the rest.
But I will pull apart and check them all out.
Thanks for the help!
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