xc70 cam thread

markcapelja · Post by **markcapelja** » 20 Jul 2016, 00:31

hi guys
about to do the timing on my xc70, and i am making a cam locking tool so i would like to know what is the thread pitch for the back of the cams so i can get the right bolt
thank you

Post by **precopster** » 20 Jul 2016, 04:03

M6 X 1.0mm would be the pitch.

I've timed about 12 CVVT engines without a locking tool and with great results. Using a lockng tool will add about 2 hours to the job and is unnecessary.

It's more important to understand that you only need this tool if the bolts on the cam sprockets have been loosened without referencing them first or if a replacement CVVT hub is being fitted. I always use the 17 cam belt teeth spacing between sprockets with great success and set the pre-load with the use of this video :

Post by **Ozark Lee** » 20 Jul 2016, 06:46

If you removed the CVVT hub then you pretty much do need the tool and it has to be stout. The center bolt on the hub torques down to about 90 ft lbs (122 Newton Meters) as I recall.

...Lee

markcapelja · Post by **markcapelja** » 20 Jul 2016, 16:29

thanks guys
i had the belt off as the oil pump seal was replaced and sump seals water pump etc. so i was wanting to do the preload correct as it is out a smidge because its throwing a 644a fault. so i thought id make a locking tool this time round and get it 100% . i might give it a go without the locking tool again, and i might apply that 17 teeth rule. the vvt is on the exhaust side only

markcapelja · Post by **markcapelja** » 21 Jul 2016, 03:03

]quick question. i have attached a picture am i correct that the vvt needs to go one more tooth to the right (i didnt have a cam locking tool at the time, thus unsure if i sprung the vvt back correctly.
(sorry for the funny angle of the picture)

Post by **Ozark Lee** » 21 Jul 2016, 06:19

From the picture I would say that you got it at least close, the sprocket on the CVVT hub isn't at the limit on its slotted hole. I assume the yellow marks correspond with the factory timing marks and the notches on the crankshaft sprocket are lined up.

...Lee

markcapelja · Post by **markcapelja** » 21 Jul 2016, 15:55

yup crank is lined up yellow marks are the timing lines on the sprocket. yes im pretty sure i have the cvvt hub one out looking at it again