Need help with Camshaft timing for 1999 Boxster 2.5 L

[Homeoboxter]

Did you take all these pictures while the crankshaft being at TDC? If so, you didn`t do the 360 degree crankshaft turn between setting the timing at the two banks. When the camshafts are lined up at TDC at one side, they need to be 180 degrees off at the other bank.

[Kice]

Yes, I did.

Can this be corrected this without removing the camshafts?

[Homeoboxter]

Originally Posted by Kice

Yes, I did.

Can this be corrected this without removing the camshafts?

I have never had to do this and I wouldn`t recommend doing it, but theoretically, if you disconnect the sprocket from the exhaust camshaft and you insert a tool into the slot of the camsaft on the other side, you should be able to rotate the two camshafts together a complete revolution. Before doing this, you would need to turn the crank a few degrees to pull back the pistons from TDC to avoid piston to valve contact.

Again, this is theoretical, I`m not sure it`s doable and you may mess up something even more. The best is probably to pull the headcover on one side and redo the timing. Make sure to reread the manual and think over what you do before you proceed. Good luck!

[Kice]

Thanks. Yes, will pull the cover and play it safe.

[pilot4fn]

Did this couole of months ago.
First you place the engine to TDC and time the Bank 1 cams. Then rotate the engine 360 degrees and lock it agian to TDC and time the Bank 2 cams.
Then test with hand tool from crank that engine rotates freely and only to the normal rotating direction (clockwise).
I had same dilemma from the factory manual and took several times reading it to be certain how to get this done right...

[Homeoboxter]

Originally Posted by pilot4fn

Did this couole of months ago.
First you place the engine to TDC and time the Bank 1 cams. Then rotate the engine 360 degrees and lock it agian to TDC and time the Bank 2 cams.
Then test with hand tool from crank that engine rotates freely and only to the normal rotating direction (clockwise).
I had same dilemma from the factory manual and took several times reading it to be certain how to get this done right...

It`s pretty straightforward if you think it over. In the boxer engine the opposing cylinders must be in the opposite stroke, i.e. if cylinder 1 is at intake, cylinder 4 must be at combustion - at cylinder 1 intake valves open while at cylinder 4 all valves are closed. This can easily be checked if you look into the ports, or just inspect the camshafts' position before you put the cover back on. To achieve this, the camshafts at the opposite banks must be off by 180 degrees, hence you turn the crank a complete revolution. It does not matter which bank you time first, the combustion will be determined by the camshaft position sensor.

[Kice]

Thanks - I did that.

Has anyone checked this table from renntech?

https://www.renntech.org/uploads/monthly_04_2014/post-93239-0-95551000-1397312927.png

[Kice]

Originally Posted by Homeoboxter

It`s pretty straightforward if you think it over. In the boxer engine the opposing cylinders must be in the opposite stroke, i.e. if cylinder 1 is at intake, cylinder 4 must be at combustion - at cylinder 1 intake valves open while at cylinder 4 all valves are closed. This can easily be checked if you look into the ports, or just inspect the camshafts' position before you put the cover back on. To achieve this, the camshafts at the opposite banks must be off by 180 degrees, hence you turn the crank a complete revolution. It does not matter which bank you time first, the combustion will be determined by the camshaft position sensor.

Hi - do you know of a table showing the different valve positions in OT? I am suspecting that the replacement cylinder head which I got on eBay came with the wrong camshafts. I found a table (https://www.renntech.org/uploads/monthly_04_2014/post-93239-0-95551000-1397312927.png), but it is for a different engine. Thnx