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threadlocker red or blue

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2001 - 2007 V70
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enotslim
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threadlocker red or blue

Post by enotslim » Sat Dec 28, 2019 2:25 pm

Everything I read says Loctite red is extremely difficult and requires heat to reverse - don't use it unless you never plan to loosen that connection. Use blue for anything you anticipate reversing. But it also seems "everyone" on mvs uses red and I've seen only red, never blue (or green or purple) on bolts removed from our 2004 XC70 and 1998 V70 T5.

Am I able to break "red" fittings due to their age and in some cases heat exposure over time? They aren't hot when I'm working on them.

Will newly applied red be significantly more difficult to reverse than the old applications I've encountered so far?

Why not just use blue?
Now:
1998 V70 T5
2004 XC70
Then:
1972 144
1988 240 Wagon

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Rattnalle
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Re: threadlocker red or blue

Post by Rattnalle » Sat Dec 28, 2019 2:27 pm

What threads are you thinking about?

Apart from pre applied on new bolts I've actually never used it on the car. I grease and torque mostly.
*Prepares to be roasted*

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abscate
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Re: threadlocker red or blue

Post by abscate » Sat Dec 28, 2019 3:08 pm

Most of the precoated Volvo bolts like caliper bolts, ball joint bolts , etc aren’t Loctite coated.
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oragex
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Re: threadlocker red or blue

Post by oragex » Sat Dec 28, 2019 4:13 pm

It will also depend on the bolt size - i.e. torque. On a smaller 10-12mm bolt, red + 10 years of rust may make it a gamble to remove (shear off). On a large 18mm lets say strut bolt (does need it but just as an example), red paste would make the bolt really difficult to undo (already difficult without the paste). Even blue would be hard to undo. The steering bolt (center one under the airbag) I think it had red one but this big bolt is actually little tight (it's pressing against some soft material). I would get both colors and stick with what comes out from the original bolt. As a fun bonus, there are also some funny 'crushed' nuts, such as the 4 ones securing the brake booster to the firewall. Man these sit on very long studs and are a pain to undo aaall the way off the stud. I've used my electric drill + socket, don't think I have the patience to do this with the ratchet.

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RickHaleParker
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Re: threadlocker red or blue

Post by RickHaleParker » Sat Dec 28, 2019 4:25 pm

Loctite Guide Red Blue Purple Green.
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0,
Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

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vtl
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Re: threadlocker red or blue

Post by vtl » Sat Dec 28, 2019 6:56 pm

Loctite Red is not even remotely close to a steel bolt that sat in the aluminum alloy for a decade.

I did add Loctite Red to some bolts, they were a bit more difficult to undo, but nothing really serious.
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

enotslim
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Re: threadlocker red or blue

Post by enotslim » Sat Dec 28, 2019 11:44 pm

Rattnalle wrote:
Sat Dec 28, 2019 2:27 pm
What threads are you thinking about?

Apart from pre applied on new bolts I've actually never used it on the car. I grease and torque mostly.
*Prepares to be roasted*
Currently working on brake caliper, strut/steering knuckle and wheel bearing/knuckle bolts all or which were "red" when disassembled.

I wonder if red-treated bolts that are still easy to break reflect surfaces that were not totally grease-free when assembled
Now:
1998 V70 T5
2004 XC70
Then:
1972 144
1988 240 Wagon

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