Resolved 420A timing belt

cross2501 · Jul 17, 2014

So, first of all, I drive a 95 gs and the pulley tensioner gave out, bearings went everywhere. The timing belt didn't snap or anything, it stayed where it was supposed to be. I replaced the water pump, timing belt, all the pulleys and tensioners I aligned the timing belt half a tooth before the mark and made the camshaft sprockets match up whenI turn it on it idles strange almost like it's missing a piston? Or did I potentially set the timing belt wrong? Any help would be much appreciated.

DSM1G90 · Jul 18, 2014

GS is a 420A motor.
As with any OHC motor, ALL marks needs to align up perfectly.
BUT, with that tensioner pulley letting go, your belt prob took a massive jump causing crank and cam timing to jump really off time..

And a 420A being an interference motor, you prob bent a valve when that pulley went where a valve was down and got kissed by an upcoming piston.

Something to check out and good luck - DSM

BoostedBeaver · Jul 18, 2014

A quick compression test can either confirm or deny the dead cylinder you think you feel. If you do have a dead cylinder or one that varies more than 10 percent, a leak down test will pin point the issue in most cases.

Given the above history a bent valve is a moderate possibility but guessing will only get you so far. Perform the two test above and post the results for a solution.

Robert

mitsubishikid · Jul 18, 2014

Take the timing cover off again, and Inspect all the timing marks again, and make sure they are all lining up right, make sure all bolts on the pulleys are set at the proper torque specs, or at the least make sure they are not loose, and then perform the above mentioned tests.

Go over both of these article links below, and inspect your work to see if all the marks line up right.

http://2gnt.com/index.php?d=Timing_Belt_Replacement
http://www.vfaq.com/mods/timingbelt-2G-NT.html

cross2501 · Jul 18, 2014

I will try a compression test to see any results.. I'm tight on money so I'm hoping to do everything but rebuild the engine. It does blow tons of blue smoke, but it always has.. And it ran fine before the tensioner gave out. Also, when I rev it, all the pistons kick in. And it doesn't seem like iv'e lost any power when I took it for a test drive.. It just idles really strange. :/

DSM1G90 · Jul 19, 2014

Still, a valve could have barely kissed a piston, with bending it just so slightly to where it can "almost" close where the cylinder can hold some compression on high revs to make it work....something to think about...

As instructed .. do a compression check with dropping a tablespoon of oil down the cylinder that has the low reading - this is a test to see if compression builds up meaning rings went bad, or compression remains the same and a valve is bad.

Good luck - DSM

cross2501 · Jul 22, 2014

Thank you guys soo much, I finally got it fixed!

I simply didn't put the timing belt on in the right order and didn't spin it to double check.. Thanks again guys!

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Resolved 420A timing belt

cross2501

DSM1G90

BoostedBeaver

mitsubishikid

cross2501

DSM1G90

cross2501

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