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Paime's 90 TD5 Chassis Swap


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Don’t forget that galvanising works electrically.  When the steel tries to rust, the zinc gives up ions or electrons (not sure which) and oxidises instead.  The maritime industry bolt big blocks of zinc to hulls and oil rig structures - they don’t coat the whole vessel or structure.  A screw hole will not rust away.  But a dollop of grease or waxoil in the hole before fitting the screw will help preserve it even better.

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4 hours ago, landroversforever said:

You can get stick on ones, but I’ve never found anything that sticks on actually stay permanently attached. 

I wouldn’t worry too much about drilling, using something like a stainless tek screw with some copper grease shouldn’t cause any issues. 

I used some stainless hex head tek screws & stainless rubber lined P clips to hold the brake pipes. 

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9 hours ago, western said:

I used some stainless hex head tek screws & stainless rubber lined P clips to hold the brake pipes. 

Plastic clips or rubber lined stainless are great.  I’m wary of unlined metal clips on copper or cunifer pipes, not only because of fretting and wear, but bimetallic corrosion. 

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36 minutes ago, Bowie69 said:

Why don't you want to drill the chassis?

Rust, rust and more rust! I've never had a good experience with coatings and bare steel in the past and the last thing I want to do is introduce the prospect of the chassis starting to rust prematurely. 

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Your galvanised chassis already has threaded sockets on it, quite a few.  These have been drilled after galvanising, or if drilled before, then they have been re-tapped afterwards to remove the zinc that fouls the thread, and they are just bare steel.  So, drilling a few additional holes for mounting pipe brackets is not going to significantly impact your chassis life, especially if protection measures above are taken.

Mike

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A bit more progress today - managed to get the front axle built up and the wheels back on. Hopefully tomorrow i'll be able to get the radius arms, springs and dampers in place and then i'll have a rolling chassis at last. A couple of questions/observations from today:

1 - Broadly speaking, what are my next steps from here? I'm thinking brake lines (need to stop being a chicken and drill the chassis for the clips), then take out the engine, replace the clutch, pop it on the new chassis then lift off the old body.

2 - i was almost in tears this morning. I've spent a good bit of time finessing my lovely new gaitors for the swivels including bonding the rubber in place which was an absolute nightmare. When i came to fit the whole assembly to the axle i realised that i couldn't get the bolts in past the new gaitor. Because it's bonded in place, after an hour or so of chin scratching i came to the sad realisation that the only way i could get my swivels on was to cut off my new gaitors. Classic Britpart strikes again!

 

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I drilled my new galv chassis as the list of clips was growing, the one area i did manage to avoid was the front by the bumper by running the brake line to the bulkhead and over the top by the heater.

clips I fitted were brake pipe singles, and doubles 6mm hole, doubles along the o/s chassis rail to hole brake line and breather from rear axle. Twin diesel clips 7mm hole? along top of o/s rail to sedimentor.

2x twin battery pipe clips on n/s rail in front of seatbox. (only had to drill 1x hole as 1 already in front lhs outrigger.

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I'd echo what western says, lay the brake lines in to the rear especially, also fuel lines (110 more so) and breathers. The one big and heavy lump which is easiest done without the engine in is the power steering box drop arm and bolts, This should also allow you to lay the power steering pipes along the front of the chassis rail inner face. If you havent already fit the bumpstops and the fuel tank and sender.

Pete

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"Classic Britpart strikes again!"

Not the case. These gaitors have been around for many years (I bought a set 20-years ago after having a bad time with the leather ones) long before they were marketed / branded by BP (was it Bailcast?) and if I recall correctly they were exactly the same. Just because BP market something it doesn't mean that they design & manufacture it. My fitting instructions are long gone but did you check you could bond the gaitors before fitting the bolts? 

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20 hours ago, Litch said:

"Classic Britpart strikes again!"

Not the case. These gaitors have been around for many years (I bought a set 20-years ago after having a bad time with the leather ones) long before they were marketed / branded by BP (was it Bailcast?) and if I recall correctly they were exactly the same. Just because BP market something it doesn't mean that they design & manufacture it. My fitting instructions are long gone but did you check you could bond the gaitors before fitting the bolts? 

Yes, Bailcast.  I have them on my RRC.  I think they’re pretty good,

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18 hours ago, landroversforever said:

Surely the gaitor would squash enough to get the bolts in? 

Not really, but what does work is to pull the neck of the gaiter up to the narrowest part of the swivel housing and push it to one side.  It is very awkward to get the bolts in with the gaiters on, though - they’re really meant to be fitted to an assembled axle.  It would be a handy comment at the beginning of the instructions.

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Some good progress this weekend. Did a few smaller jobs that were needing done such as put new swivel pins on (the old ones were a bit notchy) and also changed the pinion seals as I had the usual diff leaks. Quick question on the latter - how far in should the seal be? I've got a sneaky feeling I tapped them in too far as they're about half an inch into the casing. 

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  • 3 weeks later...

Its been a while since my last update and I've managed to get a few things done. Work and family life has taken priority but nevertheless I finally have a rolling chassis. Built up quite a few elements and im now onto some more stripping of the old chassis. Im a bit worried about my spring alignment on the front as it seems like my axle is slightly off to one side. Will things settle down once the engine is on and the springs are compressed a bit more?

 

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Good to know and panick over, thanks!

i tried removing the fuel tank last night and was met with pretty much every single nut and bolt being seized and sheering off. New fuel tank cradle ordered today as i'm going to have to carefully cut the old one out. Also tried to get the tow bar off and was met with the same problem. At this stage i think i'm just going to have to go care-free with the angle grinder and get as much off as possible. Oh the joys! 

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A bit more progress this weekend although its difficult to spot. Managed to get the fuel tank out and the towbar off plus got the steering box on. Struggling to get the old TRE off the steering bar but it's currently soaking in WD40 so fingers crossed I'll get it to budge tomorrow. 

The more I strip off the old chassis the more rot I see. Genuinely amazed the whole thing didn't collapse in on itself when I still had it on the road!

Does anyone have any good ideas for how to fix the body mount in the last pic? Seems like electrolytic corrosion has eaten away quite a chunk.

 

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