The Top DSM Community on the Web

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. Log in to remove most ads.

  • Update Your Password Today!

    We have implemented tools to identify member accounts using insecure passwords and will be locking those accounts until their passwords are updated. Don't get locked out of your account - update your password today, and ensure your account has a valid email address on file. Read more here...
Please Support STM Tuned
Join us at the 2023 Shootout!

420A 420a Timing belt tips


Proven Member
Apr 11, 2022
franklin, Tennessee
Im currently rebuilding my 420a motor from the bottom up (I have to replace main bearings and possibly resurface the crank)
Im about to pull the timing belt off but there's 2 problems 1- i cant get the stupid timing cover off without breaking it and 2 - I really just need tips for timing the motor so that I don't mess it up when I put everything back together later on


Proven Member
Nov 24, 2016
Dresden, Tennessee
The 420a timing cover isn't split at the head and the block. So that means you have to pull the front timing cover off, pull all the timing components off, and then pull the rear timing cover off. I suggest when you get the timing covers off you cut them at the block and the head. This would essentially give you an upper and lower cover. And would allow you to pull the head without removing all the timing components just to pull the rear timing cover. I cut my timing covers on my 420a, and I only run the lower covers now too.

Just make sure all your timing marks are lined up before you remove any of the timing components as well. Hope this helps
Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications RixRacing RockAuto RTM Racing STM Tuned

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds