IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

exhaust cam gear attachment to vvt

Help, Advice, Owners' Discussion and DIY Tutorials on S40 and V40. In this forum you'll find S40/V40-specific owners asking and answering questions on maintenance, ownership, repairs, tutorials and almost every do-it-yourself thing you can do to save money owning these Volvos.

1996 - 2004 S40
1996 - 2004 V40

skifire
Posts: 5
Joined: Fri Oct 14, 2011 7:42 pm
Year and Model: 2001 S80
Location: Salt Lake City Utah
Has thanked: 0
Been thanked: 0
United States of America
skifire

Volvo Repair Database exhaust cam gear attachment to vvt

Post by skifire » Fri Jun 16, 2017 3:18 pm

is there a mark that tells me the correct placement of the gear on to the vvt, seems to be able to attach in all three bolt positions which would throw off the timing mark on the timing gear

User avatar
alschnertz
Posts: 599
Joined: Fri Apr 29, 2011 9:25 am
Year and Model: 1995 854T
Location: Connecticut
Has thanked: 1 time
Been thanked: 8 times
United States of America
alschnertz

Re: exhaust cam gear attachment to vvt

Post by alschnertz » Sat Jun 17, 2017 3:52 pm

This is off the top of my head...
I don't remember having to line up anything on the exhaust cam gear when I did the VVT on my '01.
I remember it being unusual since the timing belt "set" the VVT location.

You may want to pick up a Haynes repair manual. That's what I did. After reading the procedure over and over again, it finally made sense.
Fortunately, I got it right the first time.
'60 PV544, '68 220, '70 145S, '86 745T, '95 854T, '01 S40
'84 Prelude
'06 MPV
'13 Ford Focus SE

battlin_bruce
Posts: 1
Joined: Fri Nov 04, 2011 10:22 am
Year and Model: V40
Location: VA, USA
Has thanked: 0
Been thanked: 0
battlin_bruce

Re: exhaust cam gear attachment to vvt

Post by battlin_bruce » Wed Jun 21, 2017 10:57 pm

The timing mark on the cam- gear is really not important once you pull the gear/hub off the cam. From then on out you'll make your own mark on the exhaust cam gear for the next timing checks, here's why: the gear and the hub with the VVT mechanism mount onto the cam with a center bolt, and can spin forever until you torque that center bolt real tight (80NM) but the point is- there is no reference (like a key or flat) between the cam and the hub, and if you do the job the way volvo designed it to be done, it doesn't matter. The crux is- you have to lock the cams in their indexed or timed position (preferably after turning crank to set it at TDC, and before you remove the timing belt), and thereafter- it doesnt matter what position you install the gear in, you can make a new timing mark for your use later- when installing the new belt and checking it after a couple rotations.

First look at the opposite end of the cams (the drivers side in US) after removing the rubber coated plug on the intake, and on the exhaust- removing the cam position sensor cover and the cup inside, and notice both cams have a machined slot cut across the end of the cam, offset from center, one offset above the middle of the cam center, the other below, (because it is a 4 cycle engine). These slots should be aligned or following the horizontal seam in the camshaft cover. You should lock each cam in position with a special tool so you keep the cams in proper timing, and back at the front of the engine (passenger side) look down at the crank timing-belt cog and you'll see the timing marks (2 grooves stamped into the top of 2 adjacent teeth on the inboard corner or edge of the teeth that needs to be aligned so they straddle the mark on the crankcase.
drivers side cam ends with timing slots.jpg
cam lock tool installed.jpg
volvo crank timing marks.JPG
Those 3 alignment actions- locking the intake cam, locking the exhaust cam and aligning the crank to TDC mark, make for a successfully timed engine. Theres a couple steps to take care of when installing the tensioner and belt, rotating the engine a couple turns to be sure no slack existed between gears/cogs to throw off timing, this is when you want to have your new timing marks on the cam gear already re-established, and the intake cam gear bolts set at mid slot.

Further there is a tool in my ebay-purchased volvo timing tool kit but I dont use it, a stubby bolt of sorts, that you push through a port in the crankcase at the left / driver (US) side- that fits into a notch in the flywheel locking the crank at TDC. Its a pain to get to, requires removing starter, etc. so BEFORE I remove the timing belt- I just make sure the crank and cams are turned to the exact position so that the cam locking tool fits right into place, and if you dont mess with the crank- (unlike the cams the crank doesnt tend to turn on its own) then everything will remain in factory timed position, with marks on the crank timing belt cog and crankcase lining up.

Lastly- some people insist on pulling the harmonic damper off, I do not, I just remove the last section of plastic timing belt "compartment" cover that lies under the crank cog and behind the damper, with that out of the way I have no trouble to get the new timing belt in there.
You do not have the required permissions to view the files attached to this post.

User avatar
alschnertz
Posts: 599
Joined: Fri Apr 29, 2011 9:25 am
Year and Model: 1995 854T
Location: Connecticut
Has thanked: 1 time
Been thanked: 8 times
United States of America
alschnertz

Re: exhaust cam gear attachment to vvt

Post by alschnertz » Thu Jun 22, 2017 6:24 pm

^^^^
+1
'60 PV544, '68 220, '70 145S, '86 745T, '95 854T, '01 S40
'84 Prelude
'06 MPV
'13 Ford Focus SE

skifire
Posts: 5
Joined: Fri Oct 14, 2011 7:42 pm
Year and Model: 2001 S80
Location: Salt Lake City Utah
Has thanked: 0
Been thanked: 0
United States of America
skifire

Re: exhaust cam gear attachment to vvt

Post by skifire » Fri Jun 23, 2017 2:24 pm

Thank you for that information. The motor ran very well but now I have a massive oil leak behind the vvt is that a sign of needing a new one? I put on a new exhaust cam seal.

User avatar
matthew1
Site Admin
Posts: 10201
Joined: Sat Sep 14, 2002 11:03 am
Year and Model: 850 T5, 1997
Location: Denver, Colorado, US
Has thanked: 497 times
Been thanked: 180 times
United States of America
matthew1

Re: exhaust cam gear attachment to vvt

Post by matthew1 » Tue Jul 18, 2017 4:09 pm

me7.0-cvvtfunction.pdf
You do not have the required permissions to view the files attached to this post.
Help keep MVS on the web -> click sponsors' links here on MVS when you buy from them.
Also -> Amazon link
. Click that when you go to buy something on Amazon and MVS gets a kickback.

1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
2004 V70 R [gone]

Image

Post Reply
  • Similar Topics
    Replies
    Views
    Last post