Strengthening lower control arms

Post Reply
User avatar
Peter Connan
Posts: 5644
Joined: 10 Sep 2010 07:21
Full Name: Peter Connan
Nickname: Piet
Home Town: Kempton Park
Current 4x4: 1996 Patrol 4.5SGL
Home Language: Afrikaans
Location: Kempton Park
Has thanked: 388 times
Been thanked: 448 times

Strengthening lower control arms

Post by Peter Connan » 02 Nov 2017 20:16

The rear suspension's lower control arms are probably the parts of the Patrol's suspension that are the most prone to damage. We have seen a number of these bend, probably due to bround contact, but when that happens they just fold up the next time they are loaded heavily...

The easiest way to beef them up substantially is to sleeve the tubular section

Effectively, buy a piece of 1.25" (32mm nominal bore) Schedule 80 seamless tube. This has an actual OD of 42mm and a wall thickness of just over 5mm.

Cut this to a length of between 15 and 40mm shorter than the tube section of the control arm, and then split it length-ways with an angle grinder. Then chamfer the edges of the split, so that when you put the two halves together, you have a v-shaped groove.

Clean up the tube section of the lower control arm, and then clamp the two half-pipes around it. Then weld it all together. Especially when welding near the ends, weld short sections at a time so as not to overheat the rubber bushes...
LowerControlArmMod-1.jpg (240.69 KiB) Viewed 1772 times
LowerControlArmMod-2.jpg (238.91 KiB) Viewed 1772 times
LowerControlArmMod-3.jpg (239.48 KiB) Viewed 1772 times
LowerControlArmMod-5.jpg (264.23 KiB) Viewed 1772 times
LowerControlArmMod-4.jpg (268.67 KiB) Viewed 1772 times
Mag ons ons kenniskry met lekkerkry aanhoukry.

User avatar
Patrolman 1000+
Patrolman 1000+
Posts: 1701
Joined: 21 Oct 2014 21:01
Full Name: JP Viviers
Nickname: Oupoot
Home Town: JHB
2004 4.8 GRX TURBO "Tinkerbell"
2003 TD42T GRX "The Coal Roller"
Home Language: Half & Half
Has thanked: 129 times
Been thanked: 117 times

Re: Strengthening lower control arms

Post by hugejp » 03 Nov 2017 05:09

Very simple, but effective! :thumbup:

You CAN with a NISSAN!

Jy KAN met 'n DATSUN!

Patrolman 1000+
Patrolman 1000+
Posts: 1502
Joined: 24 Feb 2014 15:33
Full Name: Errol Wilken
Nickname: Wilkie
Home Town: Pretoria
Current 4x4: 1999 4.5 GRX Nissan Patrol
2004 BMW 3.0D X5
Home Language: Afrikaans
Has thanked: 72 times
Been thanked: 95 times

Re: Strengthening lower control arms

Post by Wilkie » 03 Nov 2017 07:52

nou ja wat Peter waarvoor wag jy laat jy sny ons sal koop.... :blonde: :blonde: :blonde:

User avatar
SCUBA Patrol
Senior Member
Senior Member
Posts: 421
Joined: 08 Apr 2009 11:15
Full Name: Phillip Jacobs
Nickname: Phillip
Home Town: Cape Town (Stellenbosch)
Current 4x4: Patrol 2006 3l diesel(die eerste Voetspore een)
Home Language: Afrikaans
Location: Cape Town, Stellenbosch (Paradyskloof)
Has thanked: 23 times
Been thanked: 21 times

Re: Strengthening lower control arms

Post by SCUBA Patrol » 03 Nov 2017 08:31

Dankie vir die info en oplossing Peter! :thumbup:
2006 3l with MADMAN

Post Reply

Return to “12. Suspension, Steering & Brakes”

Who is online

Users browsing this forum: No registered users and 3 guests