grr gnash - underseal problems

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Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

grr gnash - underseal problems

Post by Ride_on » 02 Feb 2011 01:17 am

Fek, arse, bollocks.

Undersealed my rear end (oh err) last week, and just re-inspected, its pulling apart at corners and seams.

I used Epoxy mastic 121, which worked fine, then Dinitrol 447 grey rubberised. Didn't get a great thickness, 3 tins not enough. Normal shutz gun at about 75psi.

Any ideas what I did wrong?
Attachments
IMG_2774s.JPG
rear chassis brace
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

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Chris_C
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Posts: 9600
Joined: 18 Jun 2004 11:53 pm
Location: South Coast, UK

Re: grr gnash - underseal problems

Post by Chris_C » 02 Feb 2011 01:36 am

Looks like it's gone on to thick and shrunk to me... though as to how long that stuff needs between coats is anyones guess! I've certainly seen factory stuff with similar cracks in it, maybe another thin (hah, like thats possible) coat now?
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '91(H) 340 GL B14.4E - Kar; '88(F) 360 GLT B200E - Jet -> BKV 300 Runner Up 09; '89(G) 360 GLT B200E - Beast

Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: grr gnash - underseal problems

Post by Ride_on » 02 Feb 2011 05:09 pm

I thought it was on pretty thin, the big lumps BTW are welding. The big vertical seams in the wheel arch are really bad aswell and I used and fair bit extra there. Maybe you need to brush it in there?
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

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