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Timing mark problems 2004.5 s40 t5

Help, Advice, Owners' Discussion and DIY Tutorials devoted to the second generation C70, S40 and V50 Volvos -- awkwardly model year 2004 ½ onwards -- plus where to go for advice and discussion on Volvo's sporty C30 Coupe powered by Volvo's ubiquitous inline 5-cylinder power plant.
Just103
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Timing mark problems 2004.5 s40 t5

Post by Just103 » Thu Sep 26, 2019 12:57 am

Hello I am having a problem with the timing position marks on my 2004.5 s40 t5. It has 131000 miles on it and it is a automatic trans 2.5 ltr. The car had a blown head gasket and it was apart when I got a hold of it. I took the head to the shop to be inspected and surfaced. All the valves were in great shape it had a little warp but not bad. You could tell that someone had it apart not long ago by the shape of the valves and the cam bolts on the gears were stripped. I put it back together according to the cam marks lining up with the plastic cover and I took off the crank pulley and line up the gear to the mark on the block. The no 1 piston was just a few degrees before tdc as per book specs. When I turned the motor(by hand) after putting on the belt it would hang up on valves. Clockwise it would hang up on cyl. no5 intake and counter clockwise cyl. no 1 also intake. And they were pretty much open all the way. Is there something simple I am overlooking or is the cam gear on the cam wrong. I am told that the crank gear has a keyway and only goes on one way but the cam gears do not have one and can be put on randomly. . If so how do I know the position of the cam when it is to be lined up on factory marks? The car ran really good before it overheated on a road trip. I cannot find the person who took it apart. Thank you in advance for anyone who responds



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RickHaleParker
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Re: Timing mark problems 2004.5 s40 t5

Post by RickHaleParker » Thu Sep 26, 2019 9:23 am

Sounds like you did not get the Cam pulley/VVT hubs correctly aligned with the camshafts.

There is a locking tool that goes on the back end of the cams and locks them in the correct position.
Then you set the Cam pulley/VVT hubs to the marks.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
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MRScott
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Re: Timing mark problems 2004.5 s40 t5

Post by MRScott » Thu Oct 03, 2019 6:41 pm

As stated there is a special tool and the job requires it. If the pulleys are in the right position and only a belt is being put on, no seals, then no need for tool. Since it's been mucked up previously the pulleys could be on wrong. Tool is needed to loosen sprocket bolts and hold cams upon tightening of said bolts.
It seems odd that the sprockets are not indexed but I have done it enough times now that it's actually sorta nice how they designed it. Look around for the tool, there not that expensive and will pay for themselves the first time.



Just103
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Re: Timing mark problems 2004.5 s40 t5

Post by Just103 » Fri Oct 04, 2019 12:51 am

Thank you for responding mr Scott. I have had nothing but a headache. My friend took it apart and left chasing some girl. I don't understand though how can the cam gears move so much? I thought the tool just held it in place while you put the belt on . And the back of the cams does not have the slots like in the book or do I have to take the ends off. The bolt is stripped the torx bolt. Is the slot underneath? Thank you so much for your time



Just103
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Re: Timing mark problems 2004.5 s40 t5

Post by Just103 » Fri Oct 04, 2019 12:52 am

Thank you for responding mr Scott. I have had nothing but a headache. My friend took it apart and left chasing some girl. I don't understand though how can the cam gears move so much? I thought the tool just held it in place while you put the belt on . And the back of the cams does not have the slots like in the book or do I have to take the ends off. The bolt is stripped the torx bolt. Is the slot underneath? Thank you so much for your time



MRScott
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Re: Timing mark problems 2004.5 s40 t5

Post by MRScott » Fri Oct 04, 2019 6:48 pm

Yes those covers need to be removed. They are there to provide info on cam location when the engine runs. They are the trigger device that the sensors above them read. I referenced your ". I don't understand though how can the cam gears move so much?" at the end of my reply. In short if the mark on the crank sprocket is in line and the tool holds the cams in correct position, they only go on one way, then this dictates were the sprockets need to be in relation to the cams. The torque on the sprocket retaining bolts hold the gears from moving. This means with the belt on and no slack on the forward side and tension set with tensioner all that needs to be done is tighten the bolts. No marks are needed.



Just103
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Re: Timing mark problems 2004.5 s40 t5

Post by Just103 » Wed Oct 09, 2019 2:26 pm

Thank you MRScott It makes sense and I thank you for your time. Got it in time and it spins freely. Tried to start it but only fired a few times. Checked the compression and had only 50 lbs or so. must be bad rings or ?????? Time to start over or call the scrapyard



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