Danronian

We just finished assembling a b18b (w/a b18a head) for my friend and we installed it. We replaced the timing belt and lined up the TDC mark on the crank gear to the oil pump cover and we also lined up the cam gears perfectly and the timing belt went on fine.
We went to check the timing last night, (w/a timing light) and the mark on the timing cover was lined up directly b/t the middle timing line, and the TDC line, so I was like, wtf, this is way off! It shouldnt be that far off and still run perfect.
So at that point we took the alt. belt off, and the timing covers to make sure the crank gear is lined up with the timing mark on the oil pump when the cams are at TDC. Much to our surprise, its lined up perfectly.
We reinstall the crank pulley and it in no way lines up with the TDC on the lower timing belt cover even with the crank gear at TDC.
We think this might be due to the timing belt covers being off of a b18A, but I don't see why there would be different timing marks on the different covers...
But we've pretty much determined it has the wrong crank pulley on it or it has the wrong lower timing cover. But I didnt think it would make a difference since I figured all B series crank pulleys would have the same marks and the covers would have the timing marks at the same place?!

Well for now we have no way of figuring out the distributer timing since we don't have an extra crank pulley so that we can remark this crank pulley to correspond with this timing covers...but really we don't even know if this timing cover has the correct timing mark on it...

Could anyone give me insight into different crank pulleys with different markings for different B series motors or if there is a difference in where the timing marks is on different lower timing belt covers?
Thanks alot...if this is too confusing of a situation, let me know, we need this resolved so we can set his timing b/f and after he installs his turbo next weekend.

Danronian

Please?

REEMB18C1

the white mark on the crank pulley represents tdc on base time ant the red mark is 16 degrees ignition with the timing light set at 16 degrees should line id and if it doesnt u move the distributor to compinsate hopefully that answers ya ques.....

Danronian

No, it actually doesnt.
When the crank gear for the t-belt is lined up at TDC, and the cams are at TDC, when I install the crank pulley, it isnt pointing at TDC on the t-belt cover, instead its pointing mid-way b/t the red and white mark.
So I know the t-belt is installed correctly, but since the timing marks on the pulley don't correspond w/the timing of the motor, i have absolutely no way of knowing exactly where to set the timing w/the distributer. I was going to line the timing mark w/the red mark but since the pulley doesnt correspond w/the motor's actual timing...that would be really stupid.

Danronian

Help!

Smash03

Post up some pics so some of us can see whats goin on.

Danronian

I can't since i dont have the car, and my friend is driving it. But when the engine is at TDC, the timing mark on the lower timing belt cover points not at tdc on the pulley, it instead points mid way b/t the red and white mark on the pulley. But I KNOW the crank is at TDC by lining up the marking on the oil pump and the mark on the crank gear.
Now why the expletive would it be like this? Would different OEM B series pulleys really have timing marks at different places on the pulley?

Danronian

I'm guessing no one understands this problem...poo, looks like i'll have to snap some pics to get this across better. I know there is a lot of people this must have happened too though, i can't imagine it hasnt.

REEMB18C1

i kinda of dont understand but if i were you i would base time the engine with the crank pulley on line it up to the mark on the plastic cover

Danronian

To me it would seem safer to base TDC off of the crank gear since you can't really change that as easily and the covers and the crank pulley are things that could have been swapped out easier i'd think...
But no one has had the experience of a B series crank pulley with the timing marks not corresponding w/ the crank gears marks?

2point6

The white mark on the pulley is TDC. Was the head or block milled in any way? If so this could be the reason the marks are off a bit. Depending on how much was milled, you will need to adjust your cams to compensate.

spoonek9

Sounds like you might need a new crank pulley. The outer hub may have spun.

Danronian

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spoonek9 &raquo;</TD></TR><TR><TD CLASS="quote">Sounds like you might need a new crank pulley. The outer hub may have spun. </TD></TR></TABLE>
Now THAT makes sense. I know harmonic dampeners on older chevies do this alot, so it would make sense that it could happen on the crank pulley too. Damn, i really didnt think that for some reason. Thanks a lot for the input.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2point6 &raquo;</TD></TR><TR><TD CLASS="quote">The white mark on the pulley is TDC. Was the head or block milled in any way? If so this could be the reason the marks are off a bit. Depending on how much was milled, you will need to adjust your cams to compensate.</TD></TR></TABLE>
Well then cams line up at TDC and the crank gear mark lines up too, and the timing belt fits fine and is tensioned correctly, so I see no reason to adjust anything, its just the crank pulley doesnt line up correctly. But I can see that if someone put too much force on the outside of the pulley, it could spin.

NJIN BUILDR

Verifying tdc is easy.Pull a spark plug and use a piece of welding rod or metal coat hanger to find tdc.I'm with the spun outer ring theory.
Glenn