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Engine Vibration AFTER timing belt / water pump service - HELP!?!


E39Alfa
Newbie


Galant VR-4 org Post #: 1247722 posted 11/16/19 05:34 PM     Remind Me!  Send Private Message   Edit Post      
Hello again VR4 community,

Need help figuring out what’s causing my VR4 to start to vibrate at around 4-5k RPM range?

This issue arise after timing belt / water pump service done at a local shop. Car drives fine under 4k rpm BUT starts to vibrate after that. I returned the car back to the shop and explained to him the issue. He took another 2 days with the car and still can’t figure out the source of the issue. He initially thought it might be the motor mounts, not the case.

Any advice or recommendations will greatly be appreciated.

Thanks in advance



88’ JDM RHD GVR4 = Current
93’ JDM RHD Mr2 Turbo = Current
TL-SH, G35s, IS300, Mx5 Turbo, TSX, TL-S, EVO8 = SOLD

Posts: 13 | From: frederick | Member Since: 09/11/19 | IP: (68.33.74.12) | Report this post to a Moderator

gvr4ever
Forever Member
347/1000


Galant VR-4 org Post #: 1247723 posted 11/16/19 06:46 PM     Remind Me!  Send Private Message   Edit Post      
He probably did the balance shaft belt wrong. I've never had it happen, but the balance shafts can rotate with the belt off and be out of phase. I can't remember if the rear or the front likes to rotate with a belt off, but that is likely it.

I'm no longer using the balance shafts, so it's way easier to only line up the timing belt marks.



1992 Nile black w/sunroof
15xK miles. 2nd owner since 1998

Posts: 5910 | From: central Indiana | Member Since: 08/06/02 | IP: (199.168.78.42) | Report this post to a Moderator

gvr4ever
Forever Member
347/1000


Galant VR-4 org Post #: 1247724 posted 11/16/19 06:48 PM     Remind Me!  Send Private Message   Edit Post      
Step 21. click



1992 Nile black w/sunroof
15xK miles. 2nd owner since 1998

Posts: 5910 | From: central Indiana | Member Since: 08/06/02 | IP: (199.168.78.42) | Report this post to a Moderator

E39Alfa
Newbie


Galant VR-4 org Post #: 1247725 posted 11/16/19 09:44 PM     Remind Me!  Send Private Message   Edit Post      
Awesome! Thanks man.

I will print off this for the shop so they can fix the issue.



88’ JDM RHD GVR4 = Current
93’ JDM RHD Mr2 Turbo = Current
TL-SH, G35s, IS300, Mx5 Turbo, TSX, TL-S, EVO8 = SOLD

Posts: 13 | From: frederick | Member Since: 09/11/19 | IP: (2607:fb90:6039:f) | Report this post to a Moderator

tektic
Senior Member


Galant VR-4 org Post #: 1247728 posted 11/17/19 12:50 PM     Remind Me!  Send Private Message   Edit Post      
They didn't know to set the balance shafts in the first place? If they don't take responsibility for this, I would certainly look for someone more qualified to do repairs in the future. Even then I'd probably still think twice about continued business with this mechanic.

Posts: 1464 | From: ronkonkoma, ny | Member Since: 12/19/12 | IP: (24.189.25.4) | Report this post to a Moderator

tektic
Senior Member


Galant VR-4 org Post #: 1247729 posted 11/17/19 02:39 PM     Remind Me!  Send Private Message   Edit Post   
This is how everybody heads blew up back in the mid 90s after their first timing belt jobs, not reading the manual, no one adjusted the timing tension pulley. I just wonder what yours is set at right now.



7 1G DSM's now a GGSX build.

Posts: 1464 | From: ronkonkoma, ny | Member Since: 12/19/12 | IP: (2607:fb90:2456:7) | Report this post to a Moderator


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