Cross threaded wheel bolts rear wheel

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RichS2891
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While trying my new (to me) Atik alloys to see what they look like I discovered that 3 out of the 5 wheels bolts are crossed threaded on the rear of my G300. Has the drum brakes

Luckily managed to get them back on and tight, but not happy about them.

I've already bought some new correct wheel bolts and if I try to thread them in they go so far and stop.

So the options as I see it are 

1. Get a M14 1.5 tap and hope that there is enough metal in the hub part to repair the threads

2. Get someone to install  helli coils on the damaged threads

3. Replace the Axle shaft 

Which I believe is this part no 140  A4633500510

https://partsouq.com/en/catalog/genuine/unit?c=Mercedes-Benz&ssd=%24Hiwd...

 

Looking at this guide it seems to be the part and not that hard - but I guess it will be the most expensive option.

http://www.armchairlaners.co.uk/forum/index.php?topic=2014.0

What does everyone suggest - or any other ideas - especially where to buy the axle shaft from other than Merc

 

Arnie
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Re: Cross threaded wheel bolts rear wheel

I like the Atiks - one of my favourite wheels for the G. Huge choice of tyres available in 16" and the higher profile gives a nice ride.

I can't imagine how someone would have cross-threaded the wheel bolts, unless they were rusty and an air-gun was used?

Helicoils can be stronger than the original thread, and i would try these first. However, it would be best to remove the shaft and take it to a machine shop for drilling, tapping and fitting the helicoils.

Removal is quite easy compared to the front axle. You may need to replace the seals though.

(As you probably know the wheel bolts should have radius, round seats, not conical or tapered)

 

G-Restorations
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Re: Cross threaded wheel bolts rear wheel

If you've had bolts for steel wheels in alloy wheels, they are too short. This results in the the threads at the bottom of the hole getting rusty. You then use bolts the correct length the drive straight into the rusty threads. If you run a tap down the hole it will cure it.

If you don't live too far from Blackpool we can help if your stuck.

Gordon

Arnie
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Re: Cross threaded wheel bolts rear wheel

a 463 with steel wheels ?

still, it's possible Gordon is correct. No harm in trying a tap first to clean the threads

The bolts for alloys should have a 45mm shank.

 

RichS2891
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Re: Cross threaded wheel bolts rear wheel

Will try a tap on the damaged threads, - just need to get an extension for the tap as my normal wrench hits the tyre when it turns.

Hopefully wont need a new stub axle got a price from MB today £840 + vat - ouch

Arnie
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Re: Cross threaded wheel bolts rear wheel

Probably best to re-tap the threads with the wheel taken off and the brake-drum removed, so that you have good access to the drive flange and can see what's going on. Also, it means that you can clean-off any rust or swarf after the job. (Make sure you have a good jack/axle-stand.)

 lubricate the tap with some cutting lubricant or a drop of oil.

 

 

 

RichS2891
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Re: Cross threaded wheel bolts rear wheel

Thanks for everyone helps and advice, all sorted now, tapped threads and 4 new wheel bolts and  reused the orig locking wheel bolt.

Now can move on to sort the rest of the annoying niggles.

Centre console that stuck up by low range gear lever end

Passenger door that does not turn on interior light when open door

Central locking that plays up and does not work on passenger door

red diff lock conformation led that wrong way around on rear and front diffs

​rubbish radio reception

Need to find 1 more Atik alloy for spare tyre

The list goes on !