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Vvt hub

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

Bucksnortflash
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Vvt hub

Post by Bucksnortflash » Mon May 04, 2020 8:00 pm

I am trying to figure out if my vvt hub is bad or not. I replaced the timing belt,pulleys and water pump due to it leaking. After putting it back together it ran fine but the check engine light came on. After doing research I determined that the rear cam was off a tooth. I tried to fix it but I couldn't get the car to start. After numerous times of redoing the belt I did get it to start. It now idles rough and sometimes does not start at all again. It seems like it is flooding the system. When I try to re time the exhaust cam it seems to turn hard. I Thought it was suppose to have a 3 or 4 tooth free play. This one seems to turn rather hard. It is not the spring loaded version. It feels like a bad bearing. Does anyone know how easily it is supposed to move?

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darrylrobert
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Re: Vvt hub

Post by darrylrobert » Mon May 04, 2020 9:21 pm

its meant to move freely. here is a look inside yours sounds siezed.

https://volvoforums.com/forum/volvo-s60 ... ide-96701/

Bucksnortflash
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Re: Vvt hub

Post by Bucksnortflash » Tue May 05, 2020 5:41 am

Thank you for the advice, I will look into getting a new one. Would this bad hub give me obd codes for the cam shaft sensor?

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darrylrobert
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Re: Vvt hub

Post by darrylrobert » Tue May 05, 2020 5:56 am

it probably would, do you have a code reader. i hear auto shops in the states read codes for free.

Bucksnortflash
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Re: Vvt hub

Post by Bucksnortflash » Tue May 05, 2020 8:51 am

I do have a code reader, the code is p0340. Crankshaft position sensor a circuit. Bank 1 or single sensor. I checked the sensor and my readings come back that it is good. I looked up the code and couldn’t find anything suggesting it’s the vvt hub. I didn’t want to go any further till I had some verification of what it could be.

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abscate
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abscate

Re: Vvt hub

Post by abscate » Tue May 05, 2020 2:37 pm

Your 2002 will have about one tooth of play or it will set a code.

Do you have VVT hubs on both cams or just exhaust?

If you have higher end reader or VIDA you can read the cam flanks and figure out which way to go rather than guessing.

Are you setting the timing marks after passing them, going 1/2 turn more crank, then going back slowly?
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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
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Bucksnortflash
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Re: Vvt hub

Post by Bucksnortflash » Tue May 05, 2020 5:19 pm

I only have a vvt hub on the exhaust cam.i do not have a vida. I have never heard of one. I did use a frequency computer to read the current from the cam sensor and crank sensor. They both seem to be doing there job. I am setting the marks after turning them about half past and then going back. It seems to have low compression and flooding the system when I try to start the car. Sometimes it will start, sometimes it will not. When it does it is very sluggish up hill, does not idle right, and I'm sure the gas mileage is down. I have got more compression and better starting if I move the cam shaft way off the mark or move the crank a tooth but it will throw codes and not start when it is hot. Like I said before,I think the vvt hub is bad because I really don't have ant free play in it. I just don't want to get a new one if that is not the problem. It is very frustrating. Thank you for any and all imput.

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abscate
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Re: Vvt hub

Post by abscate » Tue May 05, 2020 5:45 pm

I’ve got a noisy one that I can check and see if you want to try it as a test. It’s for a 1999 so we will have to confirm it is the same as the 2002

Checked and confirmed

Part number 1275363
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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
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Bucksnortflash
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Year and Model: 2002 v70xc
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Re: Vvt hub

Post by Bucksnortflash » Sat May 09, 2020 6:25 am

Sorry I haven't had a chance to reply. I got a hub from a junk yard the other day. I have not tried it yet,hopefully this weekend. Thank you for the offer though. The new hub does move a lot easier than the other one. I think my original one is definitely bad. I just hope it takes care of my other problems.

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