Motor Kicks.... & Not In A Good Way - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-25-2009, 12:04 AM   #1
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Unhappy Motor Kicks.... & Not In A Good Way

Ok... before i get to my car... think of the cars youve had or friends have had that have trannys going out... and when you put it in drive the motor kinda kicks and makes a knocking sound that makes you go hmmm....

my motor does that after being revved up... if sitting still in park i rev it up to 3000 rmps or higher and let it drop to idle it will kick and make a popping sound then back to normal. also occasionally when running highway speeds i can punch it and it will downshift and jump to 4000rpms and kick and hesitate for half-a-second and then away we go and shell run to 120 plus with no problems...

the car runs fine its just a cause for concern. been doing it since i got the car. father said a tech in tulsa, ok said it was a loose piston cap but i think he was smoking some really good pot or something cuz a loose piston cap by now would have probably came off and then boom... blown motor... plus youd think a loose piston cap would make noise ALL THE TIME... but i dont kno... im not a professional lol

I just bring this up because if its a valve problem or something i can fix before breakdown i want to do it soon, but i dont want to tear it down and there not to be any problem with the pistons or anything and there goes 2 grand for no reason.

any ideas lemme kno
thanks guys
TL
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Old 01-25-2009, 08:16 AM   #2
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all most sounds like you have a internal problem in your transmission. Like a stretched chain.
A stretched chain will sound like your motor is kicking as you describe or some have said it to sound like a slight back fire type sound.

pm Billboost37 about this. He has gone through the whole transmission chain stretching problem before.

Go easy on your car until you can have it fixed so you don't break down somewhere.

Todd
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Old 01-27-2009, 08:19 AM   #3
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I know nothing. Sounds like one you need to hear in person to then shake your head at and wonder.

Would you say it feels like trans or engine if you had to pick one?
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Old 01-27-2009, 10:20 AM   #4
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i feel like its motor... IT kicks, and the tranny feels strong

but i dunno
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Old 01-27-2009, 10:34 AM   #5
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Does this sound like a metallic click? Or is the something you feel under load?
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Old 01-27-2009, 11:22 AM   #6
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...both...

metal click when sitting still after a complete rev up (kicks once it get back to 1000rpms)
also kicks occasionally under load but only at WOT around 4 grand once in 2nd, but that seems like a backfire more than anything and it is rare... itd be like if i was racing and wot the whole way once it got to 4 in second... hesita-boom... vrrrroooommmmm and it keeps going

just concerns me a lil... daily driving is PERFECT so i dunno
maybe she just doesnt like being raced lol
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Old 01-27-2009, 03:12 PM   #7
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Does it slam when you put it in reverse?
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Old 01-27-2009, 03:12 PM   #8
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I still think it'* a stretched chain in the transmission. think about it...
when you daily drive it'* fine
but
when you "WOT" the chain is under extreem tension and it gaves way and skips a tooth therefor the whole 'kicking' sound slash feeling happens under heavy a load.

Things wear out after time but can be rebuilt stronger than stock..so don't fret
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Old 01-27-2009, 04:34 PM   #9
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not actually its so smooth half the time i think its still in nuetral... but it does kick into drive kinda hard... not spill hot coffee all over you hard, or spin the tires hard but its noticable

like i said ... not worried just curious and a lil concerned
thought about buying a replacement tranny for a couple hundred and build it with a full shift kit and prepped for when this one falls... gotta get the money and a stand first hehe
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Old 01-27-2009, 04:39 PM   #10
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Something you may want to check. My car was shifting really hard. Made the car shake. Was bad in rush hour traffic and my wife was getting on my case about it and I could not find the cause. Everything looked right. But when I was installing headers I stumbled on this.

Name:  PA200042.jpg
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Size:  135.2 KB

The bolt on this mount fell out all on it'* own. It looked perfectly fine until I grabbed on to it. Found the bolt stuck under the engine. This is the front drivers side mount. Once I put the bolt back, the hard shifts went away.
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