Wax oil/undersealing

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Buz007
Joined: Fri 16 Jul, 2010 21:18
Posts: 244

  Z3 roadster 1.9
Location: Leeds

Wax oil/undersealing

Post by Buz007 » Wed 31 May, 2017 23:19

Hello All,

I'm thinking of setting some time aside this summer to remove the arch liners and a few panels and get the the underside cleaned and sealed up. Has anyone done this before? or is there a thread on this?

Cheers

Buz
''need I remind you 007, you have a licence to kill...not to break the traffic laws''

mrscalex
Joined: Fri 13 Mar, 2015 09:14
Posts: 803

  Z3 roadster 1.9

Re: Wax oil/undersealing

Post by mrscalex » Thu 01 Jun, 2017 00:46

Not a how to but some clues in the my rebuild thread here.

http://zroadster.net/forum/viewtopic.php?f=5&t=44270

It's a worthwhile exercise. In fact it's vital to stop your Z3 from rotting away.
ImageImage
1999 Z3 1.9 Boston Green (Dimitri) - My brother's car owned from new and restored by me
2001 Z3 2.2 Topaz Blue (Trudy) - My car rebuilt from a write-off
2002 Z3 2.2 Titan Silver (Okus) - Project car waiting for a new engine
2001 Z3 2.2 Topaz Blue (Debra) - Donor car/breaker
1998 Z3 1.9 Boston Green (Allsworth) - Donor car/breaker now gone to Z3 heaven
Always happy to try and help with spares :)

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lightning
Joined: Tue 27 Nov, 2007 08:15
Posts: 814

  Z3 roadster 3.0i
Location: Stockport

Re: Wax oil/undersealing

Post by lightning » Thu 01 Jun, 2017 08:07

Worthwhile in my opinion.

I took all the wheel arch liners off and was pleased to find no rust at all. It's important to treat inside the sills and these can be removed once the liners are off.

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colb
Joined: Sat 05 May, 2012 23:46
Posts: 583

  Z3 roadster 1.8 TU
Location: Newport South Wales UK

Re: Wax oil/undersealing

Post by colb » Thu 01 Jun, 2017 08:47

Good how to over on .org forum
https://zroadster.org/articles/bmw-z3-s ... ection.67/

Did this to mine earlier this year, very relieved to find no rust on mine, it was very clean. Good covering with clear and black Waxoyle, used a shultz gun on my compressor to apply it. You may have to thin the waxoyle down with white spirit to get it to spray ok. The white spirit evaporates out of it once applied and the waxoyle dries into its set state.

Here is my thread with pictures of mine.
viewtopic.php?f=5&t=45073
Colb
1999 BMW 1.8 Z3
1998 Honda Deauville NT650V

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Buz007
Joined: Fri 16 Jul, 2010 21:18
Posts: 244

  Z3 roadster 1.9
Location: Leeds

Re: Wax oil/undersealing

Post by Buz007 » Thu 01 Jun, 2017 10:36

Thanks All that's great, will post some pics to this thread once I've started.

Buz
''need I remind you 007, you have a licence to kill...not to break the traffic laws''

peter2b
Joined: Sat 01 Nov, 2014 18:47
Posts: 949

  Z3 roadster 2.2i
Location: cheshire

Re: Wax oil/undersealing

Post by peter2b » Thu 01 Jun, 2017 19:24

had my zed up on the car lift earlier this year found some rust on the fuel tank straps cleaned them up then coated them with Kurust and any other rusty bits then sprayed with waxol but it was very thick due to it being cold so I put the waxol bottle into a bucket of very hot water till it turned like water , no problem spraying
peterz3

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lightning
Joined: Tue 27 Nov, 2007 08:15
Posts: 814

  Z3 roadster 3.0i
Location: Stockport

Re: Wax oil/undersealing

Post by lightning » Thu 01 Jun, 2017 20:28

Dilute the Waxoyl with 10% gearbox oil and it stops it from going hard/flaking off.

I tried it on my friend's static caravan chassis, six years later the coating is still sticky and mostly intact after being subject to six British Winters.

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Buz007
Joined: Fri 16 Jul, 2010 21:18
Posts: 244

  Z3 roadster 1.9
Location: Leeds

Re: Wax oil/undersealing

Post by Buz007 » Thu 01 Jun, 2017 23:54

Brilliant advice guys thank you
''need I remind you 007, you have a licence to kill...not to break the traffic laws''

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billysally208
Joined: Sat 11 Jul, 2015 13:53
Posts: 38

  Z3 roadster 1.9i

Re: Wax oil/undersealing

Post by billysally208 » Wed 07 Jun, 2017 19:35

lightning wrote:Dilute the Waxoyl with 10% gearbox oil and it stops it from going hard/flaking off.

I tried it on my friend's static caravan chassis, six years later the coating is still sticky and mostly intact after being subject to six British Winters.
You'll get an advisory every MOT - but hey

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lightning
Joined: Tue 27 Nov, 2007 08:15
Posts: 814

  Z3 roadster 3.0i
Location: Stockport

Re: Wax oil/undersealing

Post by lightning » Thu 08 Jun, 2017 19:43

I've done it to both my Land Rover Defenders and all l get at MOT time is "it's nice to see one well protected against rust"

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BladeRunner919
Joined: Fri 17 Feb, 2012 20:18
Posts: 2221

  Z3 roadster 1.9

Re: Wax oil/undersealing

Post by BladeRunner919 » Thu 08 Jun, 2017 20:09

Why is it an advisory?

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billysally208
Joined: Sat 11 Jul, 2015 13:53
Posts: 38

  Z3 roadster 1.9i

Re: Wax oil/undersealing

Post by billysally208 » Thu 08 Jun, 2017 23:21

BladeRunner919 wrote:Why is it an advisory?
Probably because the tester is unable to examine for corrosion in floor panels,sills,suspension components, brake pipes, etc because they are covered in underseal - I sprayed the underneath of mine prior to MOT - got one advisory "underneath covered in underseal".
Wouldn't be too bothered if I was looking at a car and this was the only advisory on the sheet, in fact I would be pleased.

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BladeRunner919
Joined: Fri 17 Feb, 2012 20:18
Posts: 2221

  Z3 roadster 1.9

Re: Wax oil/undersealing

Post by BladeRunner919 » Fri 09 Jun, 2017 08:25

Oh I see. Yes, I think I recall people getting advisories on newer cars because there are so many plastic covers on things that the MOT testers can't actually see anything!

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