850 Crankshaft pulley question Topic is solved

[Clemens]

And remember, to get that 30mm nut off, you basically need an impact gun. It might be possible without one, but I wouldn't wanna try

[volvolugnut]

To properly torque the 30mm nut back onto the crank you will need a means to hold the crank from turning. There are tools available to buy or you could make your own. Details available if you need more information.
volvolugnut

[manovlov]

Salut Volvolugnut

If you have some plan of o tool to build DIY, i'm interested ...

I spend as much money for tools than for parts, at the end.

[abscate]

Manov, you can put two long M6 bolts into the harmonic balancer holes and then counter hold with a stick or a long breaker bar

[Azik09]

My way to hold any pulley in any direction using an old belt
Free end of a belt should be placed at any strong part of engine

[manovlov]

My way to hold any pulley in any direction using an old belt
Free end of a belt should be placed at any strong part of engine

Your english is perfect : Vodka !

Manov

[cn90]

Salut @manovlov,

The Crank Pulley PN is 1275801, about US $280 for Genuine Volvo.
Even FCPEuro does not sell it ("on back order").
This is simply bc this part lasts the life of the car.

I have been around Volvo forums for > 20 yrs and have NOT seen a single case of rubber separation.

The 2005-2010 Honda Odyssey van Crank Pulley can (but rarely) come apart at the rubber bond.

So, whatever Volvo (or the supplier of the crank pulley) vulcanized the rubber very very well and even after 30 yrs, it still holds up.

Here is a random photo from ebay to show everyone the rubber portion of the crank pulley, this is why
this is also called harmonic balancer. The YELLOW arrows show the rubber cracks, but they are minor cracks.

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Volvo-Crank-Pulley.jpg (306.28 KiB) Viewed 591 times

[manovlov]

Salut @manovlov,

The Crank Pulley PN is 1275801, about US $280 for Genuine Volvo.
Even FCPEuro does not sell it ("on back order").
This is simply bc this part lasts the life of the car.

I have been around Volvo forums for > 20 yrs and have NOT seen a single case of rubber separation.

The 2005-2010 Honda Odyssey van Crank Pulley can (but rarely) come apart at the rubber bond.

So, whatever Volvo (or the supplier of the crank pulley) vulcanized the rubber very very well and even after 30 yrs, it still holds up.

Here is a random photo from ebay to show everyone the rubber portion of the crank pulley, this is why
this is also called harmonic balancer. The YELLOW arrows show the rubber cracks, but they are minor cracks.

---

Volvo-Crank-Pulley.jpg

Salut cn90,

Cool to read you. I'm convinced by all minds expressed here.

Again, thanks to all of You.

Manov

[volvolugnut]

Salut Volvolugnut

If you have some plan of o tool to build DIY, i'm interested ...

I spend as much money for tools than for parts, at the end.

I thought I had a photo of the tool I made to hold the crankshaft, but I cannot find it. It is simple to make. I used about 1/8 x 1 x 1 inch steel angle (but other sizes will work). A Y shape is made from a short length and a longer length. Both angles at the top of the Y have holes to match two of the four holes in the crank pulley. Two opposite bolts of the pulley bolt through the end holes. The two angles are joined by a pivot bolt at the middle of the Y. The long end of the angle is braced against something (or held with a cheater bar) to prevent rotation of the crank while torquing the crank nut.

volvolugnut

[Kokonradus]

About tightening the crank nut on the engine. I have made a good tool that worked for me perfectly. You just tap the Y ends with 10mm sockets on the pulley screw heads while the middle of the tool has long M10 rod that will stop at the engine mount side and will safely lock the engine so you can tighten the crank nut to180Nm (on 850) with torque wrench according to manufacturers spec.