vibration in the engne bay

[TRUEeagle]

hey guys. my 94 talon is vibrating as i drive when i hit about 3500rpm. i just had the timing belt done and soon after this has been happening. my engine mounts are fine to. the only i can think of is the counter balance shaft. cause i saw this"In those engines all the timing marks can line up and it will still be out! Yes,
believe it - it happened to me in my Galant. The counter-balance shaft
turns twice for every rotation of the crank pulley, so it can be 180 deg
out of time. The vibration in mine happened at exactly 3000 rpm." im guessing this could be my problem, but im on here to get anyones opinion. thanks

 

[renovatdkitchen]

And definately conning from the engine? For me, every time I hit 2000rpm I would get a vibration. Turns out an exhaust hangar broke off and was running against the piping.

 

[TRUEeagle]

thats an idea i can check out. the vibration was getting so bad it knocked my starter bolts out and now im missing one. hopefully its something as simple

 

[renovatdkitchen]

O. Didn't know that they were THAT bad. Are all the engine mounts secure? Or better yet, upload a video of the sound and post a link here.

 

[bcjjones]

Yea if i had to guess, id say that the oil pump/rear balance shaft is out of phase

 

[ThomasGSX]

If the timing belt was not tensioned correctly, it can cause a vibration. happened to mine, but mine went away around 2200 rpms. just a thought.

 

[TRUEeagle]

thanks guys. i will take in to consideration all that you said. hopefully i can fix this soon.

 

[AFG-DSM2g]

DUDE I HAVE THIS EXACT SAME PROBLEM! I changed out my timing belt and it happens to me after 3k rpm. I THINK its my downpipe rattling against the car, or its a tensioner... I havnt had time to raise it up and re-check it, but it ive been driving it for a bit now and it hasnt been giving me any performance issues... Its just a vibrating/rattling noise to me...

 

[renovatdkitchen]

Let us know what happens best of luck!

 

[TRUEeagle]

@AFG-DSM2g

Your right. It doesn't affect my performance at all. Been drivin like this for a month now. I'm going to look under my car at work and see if I find anything out of place. I'll let you guys know how it turns out. Thanks

 

[white92talontsi]

I cannot believe that no one here has mentioned this.

To the OP. You do not have the balance shaft phased correctly.

Edit-bcjjones did mentioned it.

Get out there and check your balance shaft, it WILL be out of phase I can guarantee that.

 

[white92talontsi]

Was assuming OP knows this and was just asking if maybe its something else before he goes about tearing his timing belt out.

Well since he mentioned that he started getting the vibration right after he did the T belt then There really is only 1 thing it can be.

 

[Colt4G63 also]

Yup, been there, done that; never again. I drove mine 100 miles round trip to go snowboarding with it that way, and ripped it back apart immediately afterward. Maybe it's just me, but I don't know how you guys can stand that for a whole month.

 

[white92talontsi]

Yup, been there, done that; never again. I drove mine 100 miles round trip to go snowboarding with it that way, and ripped it back apart immediately afterward. Maybe it's just me, but I don't know how you guys can stand that for a whole month.

I did the same thing myself.
It ended causing my alternator bolt to fall out, The bearing carrier for the intermediate shaft fell out and frankly it was really bad.

 

[Colt4G63 also]

I did the same thing myself.
It ended causing my alternator bolt to fall out, The bearing carrier for the intermediate shaft fell out and frankly it was really bad.

I know, right? It was driving me absolutely crazy. I didn't know why it was vibrating at the time, so that probably added to my frustration, but I was really paranoid about it.

Edit: If my friend hadn't sat there and waited for me to assemble my car in the first place, I would have turned around and skipped the snowboarding for sure. I always felt my engine was a little worse for wear after that.

 

[white92talontsi]

I know, right? It was driving me absolutely crazy. I didn't know why it was vibrating at the time, so that probably added to my frustration, but I was really paranoid about it.

Edit: If my friend hadn't sat there and waited for me to assemble my car in the first place, I would have turned around and skipped the snowboarding for sure. I always felt my engine was a little worse for wear after that.

Yea, once you have experienced it and then fix it it feels like a whole new car.

I used to have to drive every other weekend 4 hours round trip on a Friday afternoon after work.

At 75mph turning right around 3300RPM is when it was the worst. I was so scared to run that fast I would have to slow poke at around 65 just to feel comfortable.

 

[renovatdkitchen]

Most likely yes. He did mention that it could be out of place. OP, did you rotate the t belt 6 times fully to line the belts up before you changed it?

 

[Colt4G63 also]

Yea, once you have experienced it and then fix it it feels like a whole new car.

I used to have to drive every other weekend 4 hours round trip on a Friday afternoon after work.

At 75mph turning right around 3300RPM is when it was the worst. I was so scared to run that fast I would have to slow poke at around 65 just to feel comfortable.

It's worse for me because my car runs 3500 rpm at 65mph.

 

[AFG-DSM2g]

I cannot believe that no one here has mentioned this.

To the OP. You do not have the balance shaft phased correctly.

Edit-bcjjones did mentioned it.

Get out there and check your balance shaft, it WILL be out of phase I can guarantee that.

When you say. Balance shaft,, your talking about the balance shaft sprocket right?
Im looking at this diagram and thats the closest i can find..
http://www.ilostmymind.com/manuals/DSM_manual/vfaq/proj-pics/Tbelt/Tbelt5.jpg

Im just trying to sure.
-Thanks

 

[Lofty]

The oil pump sprocket is attached to the rear balance shaft, and the balance shaft sprocket is attached to the front one obviously. Yes, they are almost certainly out of phase, which makes the car run like a bag of s$%^.

1g Timing belt
Timing Belt VFAQ (Timing Belt TSB - ENHANCED)

2g timing belt
Timing Belt VFAQ

(Turbo models)

 

[jpdsm92]

do you have a jay racing relocation. I just fixed the vibration in my engine. With free revving there was no vibation at all. 0-50mph NOTHING, 65-80mph I could feel it. It was my engine having just the right amount of lean making my alternator pulley bolt hit the frame and vibrate So if i turn left it would take it off the frame or if i turn right it would just slam it against the frame so it wouldn't bounce.

Also make sure everything mount wise is tight, I had this problem once also worn motor mounts CAN but not always will present a problem.

 

[Lofty]

Uhhhhh.

Unless you had ripped to bits motor mounts I really don't think your alternator should be slamming into the frame.

Terrible advice.

 

[jpdsm92]

Uhhhhh.

Unless you had ripped to bits motor mounts I really don't think your alternator should be slamming into the frame.

Terrible advice.

Are you high? There is a 1/8th inch between the alternator usally and the frame on a jay racing relocation kit. your telling me your engine doesn't move 1/8th because if so what mounts do you have? Soild?

 

[Lofty]

I think I may have misunterstood. Are you talking about it hitting the frame in the stock location or after it was relocated? If it hits the frame stock location something is seriously wrong. If you were talking about it hitting after it was relocated then yes you are correct. Misunderstood your post.

 

[That1Talon]

do you have a jay racing relocation. I just fixed the vibration in my engine. With free revving there was no vibation at all. 0-50mph NOTHING, 65-80mph I could feel it. It was my engine having just the right amount of lean making my alternator pulley bolt hit the frame and vibrate So if i turn left it would take it off the frame or if i turn right it would just slam it against the frame so it wouldn't bounce.

Also make sure everything mount wise is tight, I had this problem once also worn motor mounts CAN but not always will present a problem.

I assumed he had the relocation since he was asking about it .