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Old 15-08-2018   #1
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Well, it's that time again! Rear trailing bearings

It comes to us all eventually, yep, it's trailing arm bearing time again.
If they are as nice as the last ones I did three years ago, it won't be much of a job. I hope that's not put the mockers on it before I even start.
I'll see if I can do a picture guide as I go, it may be of use to anyone contemplating a similar job.
more later.
George
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Old 23-08-2018   #2
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Re: Well, it's that time again! Rear trailing bearings

Well, after a delay I finally got started. (I'm having to fit this job in between the bog roll full of jobs H-i-D has lined up for me)

... seem to having a game uploading pictures into me thread, anybody wanna instruct an ole git as to how it's done?

Old dogz un noo tricks springs to mind

Well, now thats a surprise, I asked for help uploadin an it had done it itself, geez, I'll never get the hang of theez noo fanguld fings...

Only thing is, I don't seem to beable to put a comment in each picture the way I wanted to...

Going from left then right then down etc...

1, You can see why it needs sorting...

2, Work started...

3, It looks ok in there, shoes need changing, otherwise ok...

4, WOW!, there's a first, no new brake adjusters required...

5, That looks nice and dry...

6, That 32mm was bloody tight, but I have a mate to help with awkward nuts ...

7, That's better, now we're making progress...

8, I think I deserve one of these now...

More later, George
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Old 23-08-2018   #3
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Re: Well, it's that time again! Rear trailing bearings

Pics all work fine here. Since Photobucket decided to be a bunch of c**ts, unfortunately it's not possible to mix text with photos. As you've seen, the Fiat Forum provision for uploading pictures makes "How To's" like this 'ere one a bit of a trial.

At least the weather is with you. Looks like you're giving the brakes an overhaul, as well as doing the trailing arms?

Best of luck. That hex head on the trailing arm bolt is laughing at you, waiting to join battle - I can see it . Lots of penetrating oil the night before you attack it will help, especially on the exposed bit of bolt thread.
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Old 23-08-2018   #4
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Re: Well, it's that time again! Rear trailing bearings

What a day.

There was me thinking I'm edgeing toward the downhill bit,
haha, no you're bloody well not mush.

Allow me to enlighten you - you who already know what a c**t of a job this can be.

First the brake unions in front of the axle beam, 3 days of WD, nice n hot with me gas gun, yep, smashing -

SNAP

ok, try the other one, see if it'll come apart -

SNAP

Oh well, I wanted to fit new brake pipes any way...

OK, so they're out the way, what's next? Brake cables, ok, even I can't mess this up...

Now I know why the offside rear didn't feel very effective, the cables siezed up. One more job on the list.

Now for the subframe...

Bloody big socket bar - check
18mm socket - check
Nice big hammer - check
Determined frame of mind - check

Bloody hell they're tight... ok, fire up the Hydrovane, out with the rattler,
18mm hammer socket...
That's better, first ones done, and the second, and the third ...
should done this first, only one to do and I can start on the trailing arms, tight ain't the right word for the last one, it was solid, it couldn't be more solid if were welded.
OK, more WD, another brew - very important part of the toolkit...

Right, let's get back to it, it ain't gonna fix itself.

Rattle, bang, rattle, oh, crap! The contained nut inside the chassis has come adrift and is spinning. Now I'm in the doo doo.

Where's me disc cutter...

Plan for tomorrow: zip the bolt off, do the rest of the trailing arm renewal - (bearings, road springs, shocks and brake rebuild) Then find a way of fixing the nut inside the chassis to hold the subframe together.

Any ideas people?

George
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Old 24-08-2018   #5
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Re: Well, it's that time again! Rear trailing bearings

How about:
Slice/grind the head off of the stuck bolt so that you can drop the subframe and get it out of the way.

Weld a short length of studding or a sawn-off bolt onto the end of the headless bolt.

Drill a 5 or 6mm hole in the subframe on either side of the hole where the bolt goes into the subframe, close enough to the bolt so that you'll see the captive nut directly.

Slide a length of 15mm copper tube, cut square at both ends, over the bolt shank, long enough to reach up to the bit of studding you've welded to the bolt shank.

Washer and nut onto the studding and pull them up to clamp the broken bolt tight to the subframe.

Plug weld the captive nut through the two drilled holes.

If it were me, I'd probably then saw the bolt shank off and drill the seized threaded portion out of the captive nut, just to avoid putting too much load on the plug welds. Run a tap through the nut thread with some copper grease to make sure it's clear.
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Old 25-08-2018   #6
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Re: Well, it's that time again! Rear trailing bearings

Cheers Gav, that sounds like a good way to go.

Talking to 'ourkid' about it, (he doe's a lot on trannies) he told me trannies have this all the time. They slit the chassis to 'open the box' so they can relocate it and stick weld it back in place, then mig the 'box' closed.

Sounds like a fairly easy process

I had thought about slitting the bolt off, 'r-kid' said if you open the box, weld the bolt capivater back in place, get some jungle juice on from the inside you'll get it apart easier, before miggin the box closed.

Whichever way I go it ain't getting done today. I'll photo it as I ferkit up and you can have a giggle at my expense haha.

Later.
George
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Old 30-08-2018   #7
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Re: Well, it's that time again! Rear trailing bearings

Last time I did trailing bearings I didnít disconnect the break lines ... and it was a nightmare getting the long bolt out. Still very doable though without having to strip too much. Iím sure you know this though!!
Marty.

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Old 01-09-2018   #8
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Re: Well, it's that time again! Rear trailing bearings

Well, things haven't gone according to plan...

and that's putting it mildly.

Got the first 3 subframe bolts out a breeze, the 4th was er... not quite so indulging.

Tight? Nah! welded together would better describe it. After a lot of messing about I went for the 1mm disc option (see pic #1 ).

OK, frame down but not free, brake pipes and handbrake cables were rusted to buggery.

A bit more 1mm disking and they were on the deck.

You can see the attempt to open the box, it only allowed me to see another frame within the frame, which is why I went for the slice the bolt method.

Going to start on the rip down tomorrow, if what I've found so far is any guide, it's gonna be a beech.

One thing did surprise me though, that's a new looking frame under there but everything else was like old iron. It looks like they've renewed the frame and left everything else - don't make sense to me.

Anyway, here's a few pictures...

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Old 01-09-2018   #9
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Re: Well, it's that time again! Rear trailing bearings

Are you doing all this just to replace trailing arm bearings??!... thereís no need to remove subframe at all... but itís fun!
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Old 02-09-2018   #10
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Re: Well, it's that time again! Rear trailing bearings

Personally, I think it's a lot easier doing work on the back end with the subframe dropped. But that's just me, and I didn't have the ordeal of seized subframe bolts to deal with.

Someone has certainly been there before you George. The OE finish on the subframe is black and there should be some plastic plugs that look like the end caps from a poster tube in the ends of the main round tube of the subframe. However, it looks as though that blue paint has done a pretty good job of preserving the subframe.

Those slices in the side of the chassis rail are scary


Don't buy KYB springs if you are thinking of renewing. I had real quality problems with the pair I fitted and a replacement one thereafter. Bilstein are firmer but seem to be good (as are their dampers). Suplex are cheaper & might be worth a look - apparently they supply springs as OEM for some Jaguars. Monroe do Reflex dampers which are dual-valved and have a nice ride quality. They're hard to find for the Multipla, but do exist. Part number is E1258.
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Old 02-09-2018   #11
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Re: Well, it's that time again! Rear trailing bearings

Ah itís easier for sure with it down... and itís a good opportunity to clean up/ inspect. The first thing that seems to rot in them are the bump stop holders.. wonder how they are. The paint in fairness seems to have saved it, if I had it down Iíd be replacing the 4 mounting bushes aswell as they really need it down.
Best of luck with that bolt removal!... brave... your obviously handy on the mig
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Old 03-09-2018   #12
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Re: Well, it's that time again! Rear trailing bearings

Today's effort brought up a few surprises...

I couldn't get the torsion bar off because the socket head bolts are seized solid, no surprise there then... (pic)

The 15mm hex's on the end of the torsion bar were just as bad, so they're staying put... (pic)

The shock bolts, whilst not exactly falling out, didn't give me too much grief... amazing what can be achieved with a yard of strong arm...

Now, left till last cuz I'm a coward... the actual radius arm bolts, I was dreading these... they came out so easy I was dumbfounded, I mean they really did come out easy. Simply leaned a bit heavy on me strong arm, nut creaked a bit and off it came, tap, tap, tap, and the bolt was out.

OK, that was the easy side I thought, nope, the other one was just as easy.
5 mins and they were both apart and the bolts on the deck.
The nearside one does look past it but that's only the outter bearing, the inside looks ok. The offside look good on both inner and outter. (pic)

So there it rests until tomorrow, when I'll be attending to the removal of the bearings.
I would've started knocking em out today but I wasted a lot of time on the poxy bolts that didn't fancy being messed with...

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Lost my internet (thanks Virgin) so the other pic's will be posted in the next post, sorry.
George
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Old 04-09-2018   #13
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Re: Well, it's that time again! Rear trailing bearings

Let's see if I can get the other pic's uploaded...
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Old 27-09-2018   #14
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Re: Well, it's that time again! Rear trailing bearings

Well, after lazing in Portugal for a few weeks I return to the bug and bless me, it ain't fixed itself...
The last thing I said before racing off to the sun was - you'd better be done when I get back... it obviously wasn't listening, so it looks like I've gotta do it meself, (you just can't rely on anythin these days can ya?)
I'll post some more pic's as I battle on. I've got me hands full just now so I'll just have to give it some time as I find it.

Question:
Did any of you that has done this job find that the bearings didn't go on to the shaft very easily?
I know they're supposed to be an interference fit, but these are way to tight, maybe that's why the other bearing inner race's were broken in half when I got them out?
OK, more later
George
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Old 30-09-2018   #15
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Re: Well, it's that time again! Rear trailing bearings

Well, I managed to get a bit of spannerin' done today. It's maybe not moving at record pace, but I'm doing what I can, when I can.

I got the remaining bearings out - they really didn't want to go but my trusty THOR didn't mess for long. Once all the race's were out (those awkward inner race's too) I got round to drilling and tapping for the grease nipples. Cleaned up the internal crud and WD'd it. Tomorrow I'll have the bearings in and start getting the frame together with new springs and shocks.
Here's some catch up pic's:
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