Timing Belt Parts

[nfpgasmask]

I have the whole front end apart right now. Radiator, hoses, fan, timing belt covers, it's all out. Been at it (taking my time and taking photos) since 8:30am.

Bart

[pbkid]

wow...looks like time to make a run to go get some brews to keep you going for a few more hours...

[nfpgasmask]

HALP!

It's 7:30, and I am done for today. All I can say is that there are a lot of learn-as-you-go things that happened today.

The manual sucks, says stuff like "remove this part", but it does not tell you how, doesn't tell you how many bolts/nuts to unwind, nothin.

At this point I am ready to remove the belt, but I am very confused.

Watching the timing belt video makes it look like the hash marks on THE BELT, THE PULLY, AND THE HOUSING should line up. In my case, no matter how many times I turn the engine, all three marks DO NOT line up. So, I take it I am simply supposed to line up the marks on the belt, with the marks on the engine housing, ignoring the position of the the marks on the pulleys. Has anyone done this who knows the procedure? I am nervous about doing it wrong. I have turned the engine at least 6 or more times trying to get everything to line up with no success.

I have time to do this, so hopefully someone can reply and give me some info. Otherwise I may have to wait until Monday so I can call Merlin or my local Isuzu mech. Here are some photos of what I mean:





This is the LEFT BANK PULLY and the respective marks. You can see the line on the belt is aligned with the hash mark on the housing but NOT aligned with the mark on the pulley. WTF? The bottom photo is the same with the marks in red.

Thanks - Bart

[Travelin2]

Man Bart that is a bummer, I am watching your thread closely because once you break trail here I'm gonna try it. I sure can't offer an answer but the possibilities that pop in my head is first of all someone may have installed a belt previously that is the right length but marked for a different engine. #2 It was installed with the left bank that far out of time.But then how could it run?#3 I seem to remember reading that the cam to crank ratio is such that it takes many revs to make the cam marks all come back around to the belt marks once it is rolled off of perfect. I'm just rambling here but If I were in Reno I'd buy you a cool one and tell you that tomorrow someone that knows is gonna solve this so kick back for the night. Good luck. John

[nfpgasmask]

Man Bart that is a bummer, I am watching your thread closely because once you break trail here I'm gonna try it. I sure can't offer an answer but the possibilities that pop in my head is first of all someone may have installed a belt previously that is the right length but marked for a different engine. #2 It was installed with the left bank that far out of time.But then how could it run?#3 I seem to remember reading that the cam to crank ratio is such that it takes many revs to make the cam marks all come back around to the belt marks once it is rolled off of perfect. I'm just rambling here but If I were in Reno I'd buy you a cool one and tell you that tomorrow someone that knows is gonna solve this so kick back for the night. Good luck. John

Thanks, John. I really do hope someone chimes in who has done this. I was thinking the same thing, but I have owned my VX since 25k and I really can't imagine the timing belt was done or invaded prior to me doing so. But, anything is possible I suppose. Obviously, it is currently installed correctly, otherwise How would I have put 65,000 miles on it with no timing issues?

One possibility is that I need to keep turning it, but again, I have turned the crankshaft pulley an upwards of 10 times trying to get everything to line up. When I stopped, I was turning and it looked like it was almost there, about half an inch off. So I turned it one more time and then it was a half an inch off on the other side, so

Here's the real question, and maybe a stupid one, but I know nothing about engine timing, so here goes:

Why can't I align the marks on the belt with the marks on the housing, remove the belt, and put the new one on with the marks in the same exact spot? How could it POSSIBLY be off if I do it this way?

Maybe I am overthinking this and being uber paranoid, but I REALLY don't want to mess this up.

Bart

[Travelin2]

I see what you mean about changing the belt without moving anything shouldn't make a difference, but if you had to move the crank ever so slightly to get the cogs to align you wouldn't know which way you need to nudge it to be right without marks to go by. From what I read doing the belt change with the cams out of time gets considerably more complicated. I think that is the section where I read it takes a considerable amount of revs to make the marks "catch up". I would suggest leaving the belt on till you find your Guru. He'll surface. Can you hook your battery up so you can turn it over without plugs and have someone watch to see if the cam marks gain as it spins?

[Ascinder]

Why can't I align the marks on the belt with the marks on the housing, remove the belt, and put the new one on with the marks in the same exact spot? How could it POSSIBLY be off if I do it this way?

You can.