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-   MazdaSpeed 3 - Engine, Transmission & Driveline (http://www.mazdaspeedforums.org/forum/f10/)
-   -   Bent Rod? (http://www.mazdaspeedforums.org/forum/f10/bent-rod-190961/)

Dundolla28 07-18-2015 07:29 AM

Bent Rod?
 
Ok so after reading about clutch vibrations, and how they are the first signs of a bent rod, I decided I better press down an inch or two and see if I felt any. Nothing at idle at the red light, thought everything was cool...driving down the highway I again pressed inch or two and felt small amout of vibration...nothing like rattling my foot off the pedal or anything. I hear no knocking under the hood at all either...im going to be doing a compression test and measuring piston height to make sure im not in trouble. I would have never been concerned about my clutch pedal vibrating if I didnt read about it on here....either saved me my block or just made me paranoid. Only mods I have are cobb intake, and cobb rmm (cobb ots stage 1 map). Although im finding out previous owner did have more than that...to what extent im not sure. Ive put 12,000kms on it since buying it last year. Also my TO bearing might be going as I hear noise changing when pressing/depressing clutch at idle. Maybe this is what im feeling? Or motor mount? Ill post up my compression test and piston height results when im done.

speedfreak44 07-18-2015 07:50 AM

Mine has had a very minor vibration for a long time but I am fairly certain it comes from the motor mounts (jbr88 and cs tm insert)

Dundolla28 07-18-2015 08:07 AM

Quote:

Originally Posted by speedfreak44 (Post 2919220)
Mine has had a very minor vibration for a long time but I am fairly certain it comes from the motor mounts (jbr88 and cs tm insert)

Yes im hoping this could be what im feeling. Going to check my rmm, make sure shes tight. Also check the stock pmm and tmm. Fingers crossed!

impossible 07-18-2015 08:45 AM

Miles on clutch/car? Vibrations in pedal while car is in motion or coming from a stop?

impossible 07-18-2015 08:53 AM

Press the pedal in while cruising and if the pedal has vibrations at highway speeds your motor might in fact be hurt

speedfreak44 07-18-2015 08:54 AM

Yea my vibrations are very minimal def just road/rmm related. If you feel the pedal pulsing though it is probably rod related

Dundolla28 07-18-2015 08:56 AM

Quote:

Originally Posted by impossible (Post 2919238)
Miles on clutch/car? Vibrations in pedal while car is in motion or coming from a stop?

73,000kms (45,000 miles) its a 2008.5. Vibes in gas pedal or clutch pedal? I only notice vibration in clutch pedal when driving not at a stop.

btstarcher 07-18-2015 09:34 AM

You don't have a bent rod.

Dundolla28 07-18-2015 10:11 AM

Quote:

Originally Posted by btstarcher (Post 2919254)
You don't have a bent rod.

What makes you to believe this? The fact that I only feel vibes when driving? Would I feel vibes at idle also?

btstarcher 07-18-2015 10:12 AM

With a bent rod it will vibrate to the point your foot would hurt.

Sent from my SM-N900V using Tapatalk

Dundolla28 07-18-2015 10:19 AM

Ok im starting to feel better bout this. I will still be doing compression test and measuring piston heights. I'll post up my results.

SuckSqueezBangBlow 07-18-2015 11:46 AM

I freak out some times to when I feel mine vibrate, damn near have a heart attack. If you had a bent rod, you would not be asking us, you would be telling us.

impossible 07-18-2015 12:17 PM

Do a dig from 1-6th then post back with results... Some 5th + 6th gear load at WOT should determine if you have a bent chicken leg lol

speedfreak44 07-18-2015 12:51 PM

Lmao what a harsh way to figure it out

impossible 07-18-2015 02:10 PM

best* lmao

sheston 07-19-2015 08:21 PM

I agree with @btstarcher; , It's not bent. I barely bent my (see avitar) and my pedal felt like I had ABS on steroids when I barely touched it.

CWP_MS3 07-20-2015 06:22 AM

Yeah I believe its normal. I get the same shit, but its only when I'm on the throttle as well. If I let off and lightly press on it, it doesn't vibe really. I attribute it to moving parts of the engine and motor mounts.

djern 07-21-2015 05:36 AM

normal, i got a little vibration in my pedal...noticed it about 50,000 miles ago..then i added a 88 duro tranny mount to really feel the vibes...hell I can make the pedals vibrate if I play the right song on the stereo lol


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