need help with guide rod mounts - PeachParts Mercedes-Benz Forum

ned2683 · #1 07-23-2006, 04:41 PM

1984 W126 300SD

Started to take out my guide rod mounts today to replace them. parts come in tomorrow. while i was loosening them the ones in the front came out fine.. however the arms on the captive nut on the other one was rusted through and spun/broke off. so i cannot get them out. i tried shimmying some various blocks to try to hold it down but no luck. the largest wrench i have is a 19mm and i can insert it into the hole (the closed end), but the "square" nut was just a tad bigger. does anyone have this part lying around and can find out what size closed end wrench fits? i think i will just go buy this one wrench and try to get it in there. and i have soaked and tried a lot of pb blaster before i attempted this job, but there was just too much rust on the arms of the nut to hold it together.

whunter · #2 07-23-2006, 04:46 PM

Suspension Guide Rod Replacement
on the 1985 300SD
http://www.peachparts.com/Wikka/W126GuideRod

ned2683 · #3 07-23-2006, 06:22 PM

Okay i finally got it out. i had a drill a hole in the remaining captive nut so i can jam something in there. now i am stuck at step 6. unscrewing the mount from the pod. i already loosen the clamp

I have a 19mm wrench in there with all the force i have in my it won't budge. i hit it with a hammer a couple of times and does not seem to work. my adjustment is all the way in, and i am turning it out counter clockwise like a traditional bolt, hope its not a reverse bolt. i shot a couple more PB before i gave up. any tips on this part?

whunter · #4 07-23-2006, 07:51 PM

Warm the sleeve with a propane torch.
Lube/quench with SAE30 oil, it will wick up the threads.
Apply a pipe wrench to the hex portion of the guide rod.
Use a cheater pipe on the pipe wrench as needed.

The threads are long, and will wear out your arms, wrenching it off when it is loose.

Whiskeydan · #5 07-23-2006, 09:31 PM

Quote:

Originally Posted by whunter

Warm the sleeve with a propane torch.
Lube/quench with SAE30 oil, it will wick up the threads.
Apply a pipe wrench to the hex portion of the guide rod.
Use a cheater pipe on the pipe wrench as needed.

The threads are long, and will wear out your arms, wrenching it off when it is loose.

My suggestion as well...

Be prepared to turn it a few times.