1999 V70 Front Wheel Bearing Mount Bolts

juggles · Post by **juggles** » 26 Nov 2014, 13:47

I've stripped a front wheel bearing mount bolt in my '99 v70 and my local dealer doesn't have any in stock. I'm hoping to get the car put back together before the weekend so does anyone know if there is an acceptable replacement that would be more easily available?

Post by **mecheng** » 26 Nov 2014, 14:29

Measure the threads, typically it will be metric. Did you strip the bearing threads as well?
The dealer usually only takes a day to get stock, I would wait

Post by **cn90** » 26 Nov 2014, 14:50

You will be surprised Volvo dealer can order it next day (PN 1387892) and you should have the bolt by Friday (closed Thanksgivings). Dealers order hundreds of parts everyday to fix the customer cars and they can have the part in 1-2 days.

This job requires a lot of work and the bolt head is Torx (not Hex) to clear the axle ring!!!

However, if you insist to do it the ghetto way (which I don't recommend b/c dealer can get the bolt within 1-2 days), then read the posts by Matty Moo carefully LOL!
Just bring your old bolt to local hardware store to get a good match:
https://www.matthewsvolvosite.com/forums ... =1&t=54941

NOTE for others: before doing this job, have a few bolts on standby. Better yet, replace them all.

Photo below is courtesy of Matty Moo, note the "correct" orientation of the Hex head bolt to prevent rubbing against the axle ring!

: bearing.jpg (44.17 KiB) Viewed 2600 times

Post by **Matty Moo** » 26 Nov 2014, 17:15

Lol.... That actually worked perfectly. The head has to be at a certain angle to clear the axle.

I likely wouldn't do that again as I was fed up with that car in general. Everything except the body was corroded.

JeffHicks · Post by **JeffHicks** » 26 Nov 2014, 20:58

This is precisely what I resorted to when replacing the hub assemblies on a friend's 850 recently. If I recall correctly, they're 12mm bolts, 1.75 thread, and 50mm in length.

In order to assure adequate clearance of the drive shaft, I smoothed down the "axle side" of each of the bolt heads, with a 4" angle grinder. It worked perfectly.

If anyone ever replaces those hub assemblies again, they are going to be royally confused and POd! But considering that the car already has 250k miles on it, I doubt they'll be replaced again.

Post by **cn90** » 27 Nov 2014, 08:30

Ha,

I am OK with ghetto repair but the consequence can be significant. Let's say you hit a big pothole and somehow kill the brand-new bearing, you will be staring at the ghetto hex-head bolt that was rounded off to clear the axle!

So, best is to stay ahead, get a few bolts from dealer (they are $2-$3/each, basically cheap!) beforehand.

The REAR shock absorber mount is similar: get the bolts ahead b/c chances you will break one of them.
Ditto for the Thermostat Housing Torx screws.

My BEST advice: read forums ahead of any job, take note of the cautions.
Now, if you don't want to buy extra bolts, it is fine, but make sure:
a. You call the dealer ahead of time and make sure the relevant bolts are in stock.
b. You work during dealer open hours, this way you can go and get these bolts if needed.
c. Have another mode of transportation (another car, bicycle, bus, or walk) to get to the dealer.

Nothing is more frustrating than doing a tough job on a Sunday, when all the stores are closed and you need the car for work on Monday!

Post by **rmmagow** » 27 Nov 2014, 08:43

Way big-time good advice! I have boxes of nuts and bolts for an AH, a VW, a bunch of different Mazdas, old MBs and a new growing box of nuts and bolts for my 2 Volvos. True life savers on a Sunday evening.
Happy Thanksgiving to all in the US.

JeffHicks · Post by **JeffHicks** » 27 Nov 2014, 10:16

cn90 wrote:Ha,

I am OK with ghetto repair but the consequence can be significant. Let's say you hit a big pothole and somehow kill the brand-new bearing, you will be staring at the ghetto hex-head bolt that was rounded off to clear the axle!

To clarify, there is nothing "ghetto" about what I did. Roughly 1/8" of one of the "hex lobes" of the bolt heads were rounded. If necessary, removal would be MUCH easier than those silly inverted 11mm-head OEM bolts. Also, the surface contact of the hex-head bolts to the steering knuckle is greater than the OEM bolts - so the strength of the assembly is actually better than new.

Honestly, the OEM bolts used for those hub assemblies was one of Volvo's poorer design ideas. It's almost a guarantee that you cannot successfully remove them.

Post by **cn90** » 27 Nov 2014, 11:23

Actually the Volvo bolts are not bad at all. However, after years in service, the bolt threads are soaked in road salt and develop corrosion.
To avoid stripping the Volvo bolt head, one needs to heat the threads a bit, maybe 30-60 sec with a propane torch aiming from outside directly toward the hub's threaded areas, where the bolts come out (photo in forum).
Once the threads are heated up, the factory Loctite will loosen up.

Post by **abscate** » 27 Nov 2014, 20:02

I've got leftovers from my FWB job this fall. pM me if you want me to send you the best ones I have to get you back on the road.