Wednesday, November 24, 2010

How do you adjust the valves and rockers in a '95 Mitsubishi Mirage 1.5 lire?

First off, I'm not a mechanic. Know just enough to be dangerous and don't mind admitting it. 4 cylinder in my daughters car was dead (pull plug wire and makes no difference in the rpms). Decided I was going to take off the valve cover and check the valves and rockers. I thought they had alot of play in them, more than the others. While I was getting the tools out, a friend bumped the ignition and changed location of the valves. I adjusted it like whenIi checked the first time. Car would not start. Adjusted back to where I tyhought they had been. Got it to start again, but either dies or almost dies when you put it in gear. What is the spacing on the rockers when the cylinder is open? Any ideas why the cylinder could be dead? New plugs, wires, cap and rotor. Tried turning distributor also. No difference. But need to get it back to where it can be driven at least. Any info on the valves would be appreciated. Thanks.How do you adjust the valves and rockers in a %26039;95 Mitsubishi Mirage 1.5 lire?
Intake 0.008 in

Exhaust 0.010 in

This is with the piston in the firing position, rockers off the cam lobe.

It is highly unlikely that the lash adjustment has anything to do with the cylinder not firing (dead cylinder). It is possible that having no lash would cause it, but that is not apt to occurr on it's own. It is possible that you now have the valves set %26quot;too tight%26quot;.

I would suspect the real problem to be a burnt exhaust valve assuming of course there was spark at the wire, and the plug is good. Swap plugs, and wires with 3 cylinder. If miss is still on 4, and there is valve lash, do a compression test. I bet it will be low.How do you adjust the valves and rockers in a %26039;95 Mitsubishi Mirage 1.5 lire?
I see you also turned the distributor. Now you also need a timing lite to set the timing. You can't jjust guess at where it was .Did you check to see if spark plug was actually firing ?? You must turn the engine until the piston is at top dead center. This is when the valve you are working on is in the closed position. Then you must turn the engine until the other valve closes so you can adjust it. I would stop there as you don't have a valve problem. If the spark plug doesn't fire the engine won't start. If the timing is off from turning tge distributor the engine may not start and may die when it idles. You need go to auto store and get CHILTONS book so you can fix what you screwed up. and thats just the way it is !!

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