Timing problems on lancer

[Kc773]

I could really use some information I am very frustrated. I have a 04 Mitsubishi lancer es, car is stock. I was driving down the road the car just shut down as if it lost power, check engine light came on, tried to crank car made a bicycle chain noise and would try to turn over but would not catch. Had the timing belt replaced (belt was worn and some of the teeth were chewed but it did not snap) crankshaft sensor, car tries to start will not catch. Did compression test results were above 70 in 3 cylinders 40 in the last. Tore apart the block lifters and pistons look good. Had another mechanic look at it said timing belt was an 8th of an inch off. Could that cause the low compression results? Could have trying to start it damaged the valves? Any information would be helpful as my car has been torn apart on jacks for 5 months now.

 

[GSTurbo1]

yes... with it being off can cause low compression. But I would do a leak down test to verify.

 

[DSM1G90]

Do believe that the 2004 ES Lancers came with the 4G64 SOHC 16v motor. And the mechanic didn't try to get the timing correct? Not that hard doing timing with a SOHC motor, and 1/8" (being one tooth off) won't make that big of difference in compression,esp for a SOHC motor.

But, the "bicycle chain noise" doesn't sound good where you could have dinged up the valves with pistons coming up and the valves were down causing lost compression.

 

[Kc773]

The first mechanic who came out put on the belt and sensor, did the compression test and told me I would need a new motor. The second mechanic came out to put the car back together so I could eventually send it to a shop for the new motor and said timing was off and removed the valve cover and said rocker arms were intact and the oil looked good. So before I pay the second guy to come out again and adjust the timing, I was wondering what the chances are that after it's all said and done I'm going to need a new motor anyway.

 

[DSM1G90]

Have you tried a third mechanic?

I still go by the "bicycle chain" noise and low compression that you're looking at a new motor (or, at least, a head job), esp when that belt let go.

But, don't know if the 4G64 is a non interference motor or not. If it so, then some valves took a decent hit when that belt let go...

 

[white92talontsi]

The bicycle chain noise you heard was the sound of the valves hitting the tops of the pistons.

You need to do a leakdown test with the engine at TDC to determine where you are losing pressure. You will be losing it wither out of the tailpipe or out of the throttle body or probably both if it bent more then just a single valve.

I have had Evo X's come in that ran like crap, pulled about 5 inches of vacuum and they sound just like a raggedy ass bicycle chain but they will run.

Yes the 4G64 even with the SOHC is still a interference engine.

 

[007jimmy]

this is from an evo9 that i worked on... needless to say he bent a few valves. i ran into him at a gas station and told him it would be a good idea to get his car towed to my shop.. about an hour later i ran into him agian on the side of the highway.. i stopped and just shook my head.. he got it towed to my house and had to get a completely new long block rahter then just a rebuilt head and timing job.

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[white92talontsi]

this is from an evo9 that i worked on... needless to say he bent a few valves. i ran into him at a gas station and told him it would be a good idea to get his car towed to my shop.. about an hour later i ran into him agian on the side of the highway.. i stopped and just shook my head.. he got it towed to my house and had to get a completely new long block rahter then just a rebuilt head and timing job.

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Damn it took out the oil pump sprocket too, .

 

[Kc773]

Thank you for all of your replies, I'm a girl so I'm not very mechanical. I just have one more question because of the fact that the belt did not snap and was still intact does that mean it could have prevented from damaging the heads and maybe just took out a couple of valves?

 

[007jimmy]

yes you probably just took out a couple valves to say the least.. no telling whats up with it until its torn apart.. i suggest getting it to a good mechanic.. not your run of the mill inspection shop. if you were closer id say bring it to me but thats not the case.