The Central Hub for DSM Community and Information

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. This is where the DSM platform history is documented and archived. Log in to help us in our mission, and to remove most ads from the browsing experience.

bought 92 eclipse with bent valves need timing help

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

93ETGOCART

10+ Year Contributor
482
0
Aug 28, 2008
stotts city, Missouri
ok so as the title say i just received a gift from my boss. he gave me a 92 eclipse with "bent valves". or so he says idk at all. but i took of the top timing cover and found the timing marks on the cam gears arent lined up they are about a half notch off im just wondering if that is how its supposed to be or if they should be perfect? im scared to try and start it in fear of damaging it worse. please help!!!!!!!!!!!!! here are pics
 

Attachments

You must be registered for see attachments list
The timing marks are suppose to line up, yours being out 1/2 tooth will effect the timing. I ran into this problem after i rebuilt my motor, with my timing out 1/2 tooth i could barely get the engine to idle and there was a loud ticking noise as well. i redid the timing and everything was good again. my suggestion would be to replace the timing belts and once the engine is running it would be a good idea to check the compression and do a leak down test.

good luck

Vern
 
Is the crank lined up on TDC as well in that picture?
I wouldn't expect bent valves from only being off 1/2 a tooth.

After you change the belt/tensioners they should perfect straight with each other.. IE a ruler across them should line up with the head.

You can find some pretty good deals on OEM timing packages (belt, both tensioners etc) at extremepsi.

JayRacing makes a good timing tool "kit" that includes the special tools that make it a lot easier.
 
Take off the belt and line up everything. If it has balance shafts, you need to put those in sync as well. This guide will assist you:
Timing Belt VFAQ (Timing Belt TSB - ENHANCED)

If it's half a tooth off, you might have lucked out and not have bent valves. However, looking at those pictures, that engine looks like it's been pretty neglected. If I were in your shoes, I'd personally yank the head and inspect it as a precautionary measure. Do your timing belt job right - this kit has all the parts that needs replaced:
4G63 4G63T Mitsubishi Timing Kit Package 1All Engines '89 thru 1992

I'd recommend that Jay's Racing Timing Belt Tool Kit also, as mentioned above.

To put the engine at TDC, you have to remove the timing belt, and subsequently, the timing belt cover. If you have what I'd call an intermediate level of experience on cars, this isn't too terribly difficult. Just follow the instructions step-by-step, and do not improvise or half-ass any part of it. If you do a timing belt wrong, it can cost you a lot.
 
well according to my boss the valves are for sure bent thats why he parked it he said. if i do retime it and the valves are bent what is the worse thing that could happen? the car previously sat for two years or maybe more. so the top end probably hasnt seen oil in a long time. if im retiming it i might as well pull the head while im at it right?
 
Just get it timed right,
Don't bother putting everything back on Cover,pulleys,etc. check the compression if it's no good then you just pull the belt back off and pull the head. ...But it seems like you may be a bit over your head here. if your second guessing your self this much I can't see this working out well if the valves are'nt already bent they may end up getting bent. ...
 
so if the compression is bad it has bent valves? am i understanding that right? or is there any other problems that it could be? im getting ready to go start pulling everything off and retime it. quick question which is the #1 cylinder on this motor?
 
That was weird
Just get it timed right,
Don't bother putting everything back on Cover,pulleys,etc. check the compression if it's no good then you just pull the belt back off and pull the head. ...But it seems like you may be a bit over your head here. if your second guessing your self this much I can't see this working out well if the valves are'nt already bent they may end up getting bent. ...
 
its not an over my head thing its a i really dont want to have to do this. im more of a body guy but motors arent hard especially with all the experience put together on this site. im sure ill be alright. any tips would be greatly appreciated
 
its not an over my head thing its a i really dont want to have to do this. im more of a body guy but motors arent hard especially with all the experience put together on this site. im sure ill be alright. any tips would be greatly appreciated

take your time and dont take any short cuts. If your not to comfortable with motor work it would be a good idea to buy a Hanes manual, it walks you through step by step of how take apart your motor and it gives you all your torque specs.
 
ok so i checked the timing and it is horrible. I need the special tools to loosen the timing belt so after i get them ill be able to pull the head. when i turned it over by hand it wanted to stop like twice in a full rotation so im pretty sure i must have bent valves. especially since he drove it home after it " jumped time" which im sure was due to a horrible timing job. here are the pics... i have a chiltons and plan on getting a haynes version too
 

Attachments

You must be registered for see attachments list
I never used any special tools to take the belt off. I just popped of the tensioner and the belt came off pretty easy. I would suggest getting some help with putting it back on from some that has done it before no offense but these tensioner are touchy. imo
 
ok so i took the timing cover off today and i found the rest of the timing in this condition....... any tips on how to take the timing belt off without the special tools?
 

Attachments

You must be registered for see attachments list
ok i just loosened the tensioner (it was very loose i didnt even have to try) and popped the timing belt off also i got everything out of the way for the intake and head to come out so i can get the intake the rest of the way off and start changing valves. unfortunately progress is at a stand still until i go buy another 10mm hex head. mine broke fast
 
can anyone give me tips on tightening the t-belt tensioner without the special tool? could i just put my socket and breaker bar on it and torque it down?

I made one out of a piece of flat stock. Just drilled two holes and welded nails as pins. Wasn't very sturdy but got the job done. If you can't weld you could thread some screws that are the right diameter for pins. It was a pain timing out of the car I can't imagine in the car. It took a couple of trys to get it right. Getting the proper pressure on the tensioner was a challange. :nono:
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Build Thread Updates

Latest Classifieds

Back
Top