3.0 fails to start after mud bath
- Thread starter Footofgod
- Start date
Footofgod
New member
Read previous posts.
Footofgod
New member
Okay fellas, here's a question for the smart guys:
We pulled the front cover of the motor to see the timing belt. According to the FSM the crank should be at 0* TDC and the tick marks #1 and #2 camshaft pulleys should line up with the tick marks above the pulleys on the motor.
See the attached pics below:
The tick marks do not line up and another thing to note is that there are two other marks on the cam shaft pulleys that almost line up with the tick marks on the motor. Why would those other white lines be there?
The other weird thing that doesn't seem to fit in my mind is that I doubt that the the timing belt would have slipped that much at once. It's possible but I'm doubtful.
Here's where the smart guys provide their input!!
One other thing to remember here is that the motor was running great and smooth before we cleaned the engine bay.
We pulled the front cover of the motor to see the timing belt. According to the FSM the crank should be at 0* TDC and the tick marks #1 and #2 camshaft pulleys should line up with the tick marks above the pulleys on the motor.
See the attached pics below:
The tick marks do not line up and another thing to note is that there are two other marks on the cam shaft pulleys that almost line up with the tick marks on the motor. Why would those other white lines be there?
The other weird thing that doesn't seem to fit in my mind is that I doubt that the the timing belt would have slipped that much at once. It's possible but I'm doubtful.
Here's where the smart guys provide their input!!
One other thing to remember here is that the motor was running great and smooth before we cleaned the engine bay.
Attachments
Okay guys, according to the FSM, the mechanical timing is all kinds of jacked up. I do find it hard to believe that between washing the motor and cranking it the belt would slip that much if at all. Maybe it did because according to the FSM, the timing is not right which would explain why we have spark, air and gas but no boom boom to make the engine run.
Tomorrow, I plan on helping FOG re-do his mechanical timing unless someone here can convince me otherwise.
I have no experience with the 3-VZ motors but am following the FSM. If anyone objects to what I'm thinking here please speak up.
Tomorrow, I plan on helping FOG re-do his mechanical timing unless someone here can convince me otherwise.
I have no experience with the 3-VZ motors but am following the FSM. If anyone objects to what I'm thinking here please speak up.
4Running Daily
New member
ToyoTech
New member
WOW timing is way off. I KNEW it was timing lol. anyways. should looking into getting a new tension if you have a hydraulic type. also spin the other idler bearings to see if they make noise. replace as needed.
it doesnt look odd that it slipped. i can clearly see mud has gotten into the timing belt area. some must of dried and got inbetween the belt around the time he washed it. plus it could have been off one tooth and slipped even more over time
oh also check to make sure the waterpump spins good and doesnt have any play. my dads 4.7 v8 tundra water pump was going out and caused timing to jump 2 teeth
it doesnt look odd that it slipped. i can clearly see mud has gotten into the timing belt area. some must of dried and got inbetween the belt around the time he washed it. plus it could have been off one tooth and slipped even more over time
oh also check to make sure the waterpump spins good and doesnt have any play. my dads 4.7 v8 tundra water pump was going out and caused timing to jump 2 teeth
KidVermicious
New member
How on earth did you get mud inside the timing cover?
BucknutBob
New member
I have no idea what those painted marks would be for, as the gears have clear indentations intended to be your markers. With the keyway making the gears' position unchangeable, the only true way to align the cams is on those indentations. And I second Kid's question--how in the world did mud get in there anyway?? That's bizarre. It must've wreaked havoc with your tensioner, even if only briefly.
Hyde802
New member
Its easy for mud to get in there... its just a flimsy plastic cover...
Its very odd that the belt would have slipped, and I doubt that that is your issue, but I also agree that does look off.
I have marks like that on my cams.... because I put them there, Haha. But mine are over the factory marks, just to make them easier to read.
Interested to see if this was your problem.
Its a 91, so as long as its the factory motor, he should have the spring type. If it did slip, it still might be worth replacing.
Its very odd that the belt would have slipped, and I doubt that that is your issue, but I also agree that does look off.
I have marks like that on my cams.... because I put them there, Haha. But mine are over the factory marks, just to make them easier to read.
Interested to see if this was your problem.
Its a 91, so as long as its the factory motor, he should have the spring type. If it did slip, it still might be worth replacing.
Last edited:
4runnertank
New member
He's right! Looks like that belt has flopped around a ton in there, which worries me. And I don't want to sound stupid.... but isn't stock timing supposed to be at 10 degrees???
Ignition timing is 10*. Mechanical timing is all done at 0*.
Thanks for the input guys. I feel pretty confident that the timing is our issue. We have excellent spark. We dumped some fuel from the fuel line and did a boom test on it (light it on fire) to make sure that the motor was getting good fuel that wasn't contaminated with water. If we have fuel, air and spark... the ONLY thing that could be left is timing. If your ignition timing is good then it has to be mechanical timing.
Hyde: If you don't think this is our problem then please speak up and let me know why. I am no motor expert, I just learn from the FSM and go from there.
KidVermicious
New member
I'm no expert, but this is my thinking too. I hope you guys nailed it.
CAN-03runner
New member
Wow, the forum is really coming together on this one. :thumb3:
Hope you fix it soon.
Hope you fix it soon.
Hyde802
New member
Im not that great with motors...so dont really listen to me. Haha But I agree the timing does look off.
I just feel, You started it, it ran fine, washed it, and now it wont start? I dont see how the timing jumped just from washing it. Must of been a pretty high pressure hose....
For your guys sake, I hope it does fix it!
Edit: I had one last thought... Cant remember if you said that you could hear the fuel pump coming on... But is there a connector under the passenger front seat that goes back to the fuel pump? Possibly got unpluged while cleaning the interior out, then didnt get plugged back in? maybe?
And when trying to start it, can you hear it backfiring out of the intake or anything? Thats what mine was doing when the timing wasnt right...
Last edited:
We are getting pressure to the fuel rail so the fuel pump is turning on and doing its job.
I think what happened is that dirt and mud got in between the belt and gears and allowed the belt to slip. It's the only thing that I can think of. Maybe when washing the motor there was still water in there when we tried to start it and it allowed the belt to slip? I don't know really what caused the belt to slip. All I can say is that according to the FSM, that timing is as wrong as two boys kissing!!
