99 c70 timing belt question

[corviarbob]

check out this vin and see if it say turbo for you? YV1NC56D3XJ004286

[abscate]

Perfect picture of the turbo wastage (actuator) and the BFH going up and over the top...

TURBO!!

[Ozark Lee]

Indeed, turbo and CVVT. Once you get the belt back on don't go to a lot of effort setting the tensioner just right because you will need to set the preload on the CVVT hub. That will require installing the belt, rotating engine clockwise and then 90 degrees past clockwise, and then back counterclockwise to the marks.

At that point you will need to remove the belt from the camshaft sprockets and then thread it back on while resetting the mark on the exhaust sprocket. Once that is done you can go ahead and do the final setup on the tensioner.

If the front exhaust cam seal is not leaking I would suggest that you leave it alone. To change that seal will require the rear cam locking tool which is also known as the cam adjustment tool. Changing that seal makes things about 10 times more complicated since you lose all reference on the exhaust cam in the process of removing the CVVT hub.

...Lee

[corviarbob]

lee have you see any videos of this procedure? if so can you direct me to them thanks.

[corviarbob]

Indeed, turbo and CVVT. Once you get the belt back on don't go to a lot of effort setting the tensioner just right because you will need to set the preload on the CVVT hub. That will require installing the belt, rotating engine clockwise and then 90 degrees past clockwise, and then back counterclockwise to the marks.

At that point you will need to remove the belt from the camshaft sprockets and then thread it back on while resetting the mark on the exhaust sprocket. Once that is done you can go ahead and do the final setup on the tensioner.

If the front exhaust cam seal is not leaking I would suggest that you leave it alone. To change that seal will require the rear cam locking tool which is also known as the cam adjustment tool. Changing that seal makes things about 10 times more complicated since you lose all reference on the exhaust cam in the process of removing the CVVT hub.

...Lee

lee is this a good reference video to use for mr installation?

[Ozark Lee]

That video is spot on if you need to change the seals. In the very first part he did the preload setup procedure which is totally unnecessary if the hub is coming off but that is what you do if the seal is not being changed. I go a little further and turn the cams 90 degrees before coming back to zero but in the end it is all the same.

If you didn't do that before removing the old belt then you will need to do it is a part of the final installation. That is why I said not to get too carried away setting up the initial tension.

If you don't change the seal then just install the belt with the marks matched up, crank the engine over a couple of revolutions, and then go 90 degrees past clockwise and then back to the marks counterclockwise. Remove the belt from the camshafts and then re-install it lining the sprocket mark on the hub back to the mark. As you can see in the video the sprocket on the hub moves independently from the hub itself.

When you are done and after you start the car the bolts that hold the sprocket onto the hub should not be at either limit in the slots on the sprocket. It really never winds up dead center in the slot but it shouldn't be all the way to one end or the other.

If you don't get it exactly right the worst thing that will happen is you will throw a P0014 code and the ECU will shut down the CVVT operation. I drove mine for a week that way whilst waiting for the cam adjustment tool to get it set correctly. It won't hurt the engine and it just makes it run a bit sluggish compared to normal with the CVVT defeated.

...Lee

[corviarbob]

thanks lee i get the parts tomorrow and will give it a try, using the firs part of that video. i went out today and i can move that gear but i don't think i'm moving the cam just the gear. so for starters your saying i should put the belt on with the mark aligned and then turn the crank what 2 turns and then stop at the timing marks to see what lines up. then turn the crank 90 deg in the same clockwise rotation then back and if the timing is off take the belt back off the exhaust gear and realign to the marks? then readjust the slack adjuster? that is what i think your saying anyway. thanks

[corviarbob]

lee i put the belt on the crank and then over the idler and up around the intake gear then i turned the exhaust gear to line up the marks and the belt and finished getting it on the pump and back idler and them adjust that idler to the center spot. i then turned the crank 2 times and each time all the mark aligned. then went past the marks 90 deg on the intake gear and then backed it up the the timing marks again they all lined up. so i put the reserpine belt on. that was harder the the timing belt i thought i would remember the routing but did not and the manual was wrong and the internet was wrong so i guested and got it. but i fill the coolant and started the engine and it fired up revved to 2000 and then back to 900 or so i revved it a few times and is settled to 900. then i shut it off a few times and restarted it and the same ran smooth. so far no code. but i have not driven it so the code may still be there.

so did i understand your instructions or am i in for a surprise? thanks my manual show the serpintine belt routing around 6 hubs i had 5 took a bit but i finally got it.

[Ozark Lee]

If you have no code it is happy. The P0014 code gets set instantly is the preload is off by very much.

The serp belt is a challenge, particularly since it is double sided.

...Lee

[MilwaukeeV70owner]

"If you don't get it exactly right the worst thing that will happen is you will throw a P0014 code and the ECU will shut down the CVVT operation. I drove mine for a week that way whilst waiting for the cam adjustment tool to get it set correctly. It won't hurt the engine and it just makes it run a bit sluggish compared to normal with the CVVT defeated. "

What if you're not getting a p0014 after about 150 miles and it still runs sluggish(like pulling a light trailer maybe). It may be happy, but I'm not super happy with the performance.