Hello guys, 07' with 52,000kms and I just did the valve check this winter. All within spec....put everything back together as was found. I'm now getting a deeper rumble (exhaust note) when idling.....give it some throttle and it sounds like a valve (not exhaust or intake kind) popping closed (or open) and the rumble sound goes away. Rumble sound is very evident at front of engine. With any kind of throttle it sounds normal....right after I hear that popping sound. It's not backfiring it just sounds like something just shut. I know very vague description but thats the best I can do .....not sure if video will pick it up. Any thoughts? Runs fine....just this annoying rumble off of throttle.
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