Engine Jumped Timing Diagnosis- 2000 Base

[Homeoboxter]

Originally Posted by Anker

Worn cam chain tensioner pads. The brown bits are pieces off the pads.

If the chain gets loose enough it can skip a tooth. Try turning the engine manually and see if you can get the slots for the cam locking tool to line up. As far as I remember they should both be vertical at the same time. That should give you a clue.

I agree. I had the same issue with mine, the chain pads wore out and one completely slipped out of the way and got the chain loose. Take a look at my show&tell thread, that may give you an idea how deeply you will have to dig into the engine. I think it`s possible to fix it without pulling the engine out, it`s not an easy job though with the engine in place.

[TNT79Bronco]

Originally Posted by Homeoboxter

I agree. I had the same issue with mine, the chain pads wore out and one completely slipped out of the way and got the chain loose. Take a look at my show&tell thread, that may give you an idea how deeply you will have to dig into the engine. I think it`s possible to fix it without pulling the engine out, it`s not an easy job though with the engine in place.

Thanks. I am curious, when the chain pad slipped out of the way and the chain loosened, did it do damage to your engine? Did you get a CEL or anything?

I will search for your thread and check it out. Thanks for the feedback.

[Homeoboxter]

Originally Posted by TNT79Bronco

Thanks. I am curious, when the chain pad slipped out of the way and the chain loosened, did it do damage to your engine? Did you get a CEL or anything?

I will search for your thread and check it out. Thanks for the feedback.

I bought the car as non-op, I`ve never seen it running. The valves clearly made contact with the pistons, but nothing broke or got damaged.

[blue62]

With a cam out of time (and you have visual evidence of that) I would want to check the valve train to make sure nothing was bent or damaged..:eek your endoscope pictures may be showing some valve piston contact. hard to tell. Pistons look undamaged.

[TNT79Bronco]

Originally Posted by blue62

With a cam out of time (and you have visual evidence of that) I would want to check the valve train to make sure nothing was bent or damaged..:eek your endoscope pictures may be showing some valve piston contact. hard to tell. Pistons look undamaged.

Yeah....thanks. I kind of suspected that, from the way it looks....BUT.....hopeful. I am in the process of pulling the transmission and then the engine. I will dig into the engine and see what the status is, and then post some more pictures.

It would be waaaaaay overly optimistic of me to hope that there wasn't any damage to the heads or the valves.

[Homeoboxter]

Originally Posted by TNT79Bronco

Yeah....thanks. I kind of suspected that, from the way it looks....BUT.....hopeful. I am in the process of pulling the transmission and then the engine. I will dig into the engine and see what the status is, and then post some more pictures.

It would be waaaaaay overly optimistic of me to hope that there wasn't any damage to the heads or the valves.

It`s entirely possible. You mentioned the crank can spin around freely.

[TNT79Bronco]

Originally Posted by Homeoboxter

I bought the car as non-op, I`ve never seen it running. The valves clearly made contact with the pistons, but nothing broke or got damaged.

Sounds like we need to get that bad boy running!!!! I see you are in San Jose. I am in San Ramon!

[blue62]

Bronco
Please post pictures of what you find, myself as well as many others will be interested in what your follow up finds.
Good luck with it, you may get by with minor damage.

[Homeoboxter]

Originally Posted by TNT79Bronco

Sounds like we need to get that bad boy running!!!! I see you are in San Jose. I am in San Ramon!

Oh, great! Feel free to stop by if you wanna look into the engine in person before you pull it apart. Mine is still in bits and bolts...

[TNT79Bronco]

Originally Posted by Homeoboxter

Oh, great! Feel free to stop by if you wanna look into the engine in person before you pull it apart. Mine is still in bits and bolts...

Thanks! I have had the good fortune of being able to attend Jake Raby’s engine assembly class in Georgia. We started off by disassembling two engines and determing the cause of failure. We then assembled a complete engine, from the ground up over the next couple of days. Very cool class.

[Gilles]

Originally Posted by TNT79Bronco

Thanks! I have had the good fortune of being able to attend Jake Raby’s engine assembly class in Georgia. We started off by disassembling two engines and determing the cause of failure. We then assembled a complete engine, from the ground up over the next couple of days. Very cool class.

+ 1

Very cool indeed..!

[Homeoboxter]

Originally Posted by TNT79Bronco

Thanks! I have had the good fortune of being able to attend Jake Raby’s engine assembly class in Georgia. We started off by disassembling two engines and determing the cause of failure. We then assembled a complete engine, from the ground up over the next couple of days. Very cool class.

Nice! What`s required to be able to attend?