1999 S70 2.4L Turbo Timing Question

vfrman1 · Post by **vfrman1** » 22 Jul 2013, 06:07

TIme for the dumb question of the day...on the exhaust cam, are the three bolts in the slots for the variable timing supposed to be tight and not allow the timing to change?

My brother-in-law was borrowing my car while I was stationed overseas and the head gasket gave out. He replaced the gasket and now the car throws the dreaded P0016 code. My other thought is he got the timing one tooth off.

Post by **Ozark Lee** » 22 Jul 2013, 11:19

The pre-load on the CVVT hub isn't set correctly.

Given that there was a head gasket change involved here you may need to get your hands on a camshaft adjustment tool to get it set properly. If the CVVT hub was not removed from the camshaft you might be able to get by with just setting the pre-load from the point where you are.

Check the timing marks and see if all three line up to their reference marks. If they are lined up correctly rotate the engine by hand, clockwise, one full revolution to get the marks lined up again. Continue clockwise another 90 degrees and then rotate the engine counterclockwise back to the marks.

Remove the timing belt from the camshaft sprockets and re-thread the belt going across the intake cam first. As you put the belt back on the exhaust cam rotate the outer flange on the CVVT hub to line up with the timing reference mark as you put the belt back on. The bolts on the CVVT hub should not be all the way to one limit or the other but they usually aren't perfectly centered either.

Reset the indicator on the tensioner to back in the window and tighten things down. rotate the engine by hand a few revolutions clockwise and recheck the tension indicator - adjust the tension as necessary.

From there start the car and clear the code.

If that doesn't correct the problem you will need to go through the entire setup procedure which means you will need to get a camshaft adjustment tool.

...Lee

vfrman1 · Post by **vfrman1** » 24 Jul 2013, 17:07

This sounds like I should just take it to the dealer and then grab my ankles.

vfrman1 · Post by **vfrman1** » 24 Jul 2013, 18:21

OK. I dove into this...and now I have one quick question: The timing marks are aligned. When I do the one full rotation plus 90 degrees then back 90 degrees, are the bolts that secure the exhaust cam outer flange to the CVVT hub loose or does this matter at this point?

Post by **Ozark Lee** » 25 Jul 2013, 06:57

The outer flange is loose. Perhaps I should rephrase that, it isn't tight. The bolts are torqued to specification but the outer sprocket on the hub assembly floats to an extent.

...Lee

vfrman1 · Post by **vfrman1** » 25 Jul 2013, 21:43

I gave up. It is running but with the light. I am taking it to a technician on Monday.

Thanks for the help.

Post by **Ozark Lee** » 25 Jul 2013, 23:13

Would it help for you to take in the official procedure? I have both versions, the full setup that is starting from scratch and the procedure for just changing the belt.

timing belt 99 vvt.pdf: (402.54 KiB) Downloaded 258 times

VVT Timing.pdf: (2.79 MiB) Downloaded 271 times

The last one is about as clear as mud but once you mentally differentiate the hub from the sprocket things make more sense. On the full procedure there aren't any short cuts - it needs to be followed precisely.

...Lee

vfrman1 · Post by **vfrman1** » 26 Jul 2013, 18:18

Thanks Lee. I just don't have the cam alignment tool to do this. I am just giving up and want the damn code cleared. To the technician on Monday....