You should always clean and re-lube the sliders.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

Is the same true for the "always replace" CV axle bolts?

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

Which ones are you talking about? If you are talking about a hub bolt that requires a certain amount of torque and then a 90 degrees turn. Then, yes that bolt needs to be replaced. If you are talking about the axle flange bolts, KISS applies here also.


.

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1983 123.133 California
- GreaseCar Veg System

There is also a lot of people out there that replace Brake Calipers and do not have Torque Wrench.
There is also Mechanics that don't only use a Torque Wrench on what they feel needs to be Torqued regardless of what a Manual tells them (assuming they have read the Manual).

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84 300D, 82 Volvo 244Gl Diesel

I've done both cleaning the bolt threads and using the blue loctite stuff and using new MB bolts, same result, no issues.

Torqued properly.

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83 SD

84 CD

Just did my fronts again yesterday afternoon for the 4th time. Always need a breaker bar to get them off.

Original bolts - I clean them on the bench grinder with a metal brush attachment then apply a liberal amount of thread sealer blue to the last inch of the bolt and torque to 115Nm.

I've got a collection of new bolts that come with various parts but none of these new bolts are near the quality of the originals.
I just make sure that any new bolts are not a higher strength grade otherwise I will use them. ie if my original bolts are grade 10.9 and the supplied bolts are 12.9 I'll use them instead.

I do not reuse nuts if they are the kind that make their own thread for 'once use only'

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1995 E300 Diesel