Timing belt alignment off after timing belt job

Post by **cn90** » 26 Dec 2017, 18:17

For academic discussion...

- Find an INA tensioner and install it.
- If the belt still "walks", it is the defective belt.
- If the belt stops "walking", it is the defective Chinese tensioner.

mrjay62 · Post by **mrjay62** » 18 Sep 2018, 13:54

My 2 cents

I have a 2002 v70 xc. 187+miles . Last Friday while driving 50,55 mph without warning the water pump seized and threw the belt off...
Back in December of 2016 the idler pully was screaming at me, I wanted to replace that weekend so I Stopped at Volvo dealership and bit the bullet and got both pullys belt and water pump.... 2 years ago... I diver maybe maybe 5k a year rest ofthe time the car is garage kept.
Now looking at a head replacement, ,
I guess my points is doesn't seem to matter much anymore by who or where something is made.... Ship Happen.... its the way of the world nothing built to last anymore..... grrrrrr

Post by **abscate** » 18 Sep 2018, 14:17

Two years on a Volvo water pump? Something went wrong there. Save those old parts.

Im across the State in ALB but drive through frequently. Can give a hand with the assesment and cylinder head job.

mrjay62 · Post by **mrjay62** » 18 Sep 2018, 14:36

Hey Abscate..... How are you....
Dont know if you remember me I had the Boots Problem. That put my in the hospital for 2 days I separated a fusion in my neck... grrrrr
Turned out to be the pipe that comes from the intercooler over the motor to the turbo.
The mounting point that little one of two plastic pos plastic weld 3/4 of it has come apart when it was off you couldn't see it , When i mounted back on the car and it opened up.
What PITA that was.... had me chasing my own butt for days!

Right now im looking for a better Camera to see how deep those marks or gouges are on the Pistons before I go any further. Each Piston got hit I dont see anything sitting on the pistons , no metal no valves just contact marks and some kinds look deeper than others... need a better camera/scope to know for sure...

Zach06496 · Post by **Zach06496** » 17 Aug 2020, 21:03

I know this is an old post but I really wanted to address this after this very same thing happened to me after installing the timing belt on a Volvo V50. The walking issue is caused by the crank pulley not being seated all the way on the shaft. Take the harmonic balancer off, throw a size 30 socket over the shaft and hit the crank pulley in until it is flush with the notches. Throw the harmonic balancer back on and torque the bolt to 133. The belt will walk straight as an arrow and it can be out back together. Hopes this helps others as I couldn't find the answer I just had to figure it out.

Post by **jonesg** » 18 Aug 2020, 06:04

Zach06496 wrote: ↑17 Aug 2020, 21:03 I know this is an old post but I really wanted to address this after this very same thing happened to me after installing the timing belt on a Volvo V50. The walking issue is caused by the crank pulley not being seated all the way on the shaft. Take the harmonic balancer off, throw a size 30 socket over the shaft and hit the crank pulley in until it is flush with the notches. Throw the harmonic balancer back on and torque the bolt to 133. The belt will walk straight as an arrow and it can be out back together. Hopes this helps others as I couldn't find the answer I just had to figure it out.

I posted on here 2 months ago the exact same problem, 30MM pulley retaining nut went AWOL.
I replaced the timing belt pulley and 30 MM nut.

Zach06496 · Post by **Zach06496** » 18 Aug 2020, 08:26

Lol sorry I missed that, probably would have saved me a bit of time if I saw it!

Post by **jonesg** » 19 Aug 2020, 03:03

Zach06496 wrote: ↑18 Aug 2020, 08:26 Lol sorry I missed that, probably would have saved me a bit of time if I saw it!

If you do a google search it happens quite often, someone doesn't torque it back and at some point sooner or later it comes loose.
I never touched mine for the 4 years I've owned it but then one day the nut went awol.
the 4 10mm bolts holding the damper to the pulley were also finger loose.

Zach06496 · Post by **Zach06496** » 19 Aug 2020, 08:26

Ya, alot of the Google search forums try to blame bad parts and stuff. Found a split in the new timing belt while I was changing out the spark plugs. I have a new one on the way, time to do it all over again lol. At least I won't be doing to water pump, tensioner and idler again.

Post by **Kara503** » 18 Jan 2022, 21:52

Just wanted to chalk another fix up for this problem to the crank pulley being loose. Belt was walking nearly all the way off the cam gears after only 10 seconds or so of idling. Tightened the crank pulley bolt and the problem is gone!

Found this on an 08 C70T5, the problem originated from a snapped AC belt. It got sucked up into the timing belt somehow and seized the engine. There were metal cords from the belt wedged in behind the crank pulley- I'm not sure if maybe those metal cords are what forced the pulley out or the 30mm was lose, possibly both? Either way, rebuilt the head to fix the bent valves and now all is well!

Timing belt alignment off after timing belt job

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