Underside protection 122s

[Thowdfella]

I recently bought a 1966 122s which needs considerable work on it. I have just had some necessary welding done to the underside and it was seen that quite a bit of the original underseal has lifted. As I dont have a pit in the garage it would be very difficult for me to get all this off. My son has a P1800 and he removed all his with a blow torch. Is this a service that can be done by say dinitrol or waxoil garages or are there specialist garages that would do this.

[omc 47]

Originally Posted by Thowdfella

I recently bought a 1966 122s which needs considerable work on it. I have just had some necessary welding done to the underside and it was seen that quite a bit of the original underseal has lifted. As I dont have a pit in the garage it would be very difficult for me to get all this off. My son has a P1800 and he removed all his with a blow torch. Is this a service that can be done by say dinitrol or waxoil garages or are there specialist garages that would do this.

A good old trolley jack,axle stands, half inch chisel and dedication is the answer.
"Melting" the underseal with solvents is messy and time consuming,chipping away revealing the original finish is cleaner and tidier in the end.
Pick yourself a slot in your day and do small areas at a time as lying on your back can be boring but don't look at the big picture just treat increments of the panel work a bit at a time.
There may be brown rust under some of the "lifted" areas but it ALL needs removing and then treating with a rust killer and painted with 2 pack epoxy primeror equivelent.

Garage Services and lift ramps sounds expensive,a blow torch under a car with underseal AND every other conceivable fluid????...............you do the sums !!!

Speaking from experience my Amazon had the full treatment with me lay under neath but it was very satisfying to see the end result.
Good luck .....Andy

[Army]

As already said it can be pretty time and labour intensive.

I personally think fire in this case is a very unhealthy choice - the fumes coming off smoldering bitumen are not nice.

For my PV best way I found for removing underseal was

1) Scrape off the outer layers as best you can

I eventually bought one of those fancy multi-tools that you can fit all those expensive fancy attachments.



https://www.volvoforums.org.uk/showt...277319&page=22

2) Then I used 2K cellulose thinner

This old fashioned thinner does stink but it isn't as bad as smoldering bitumen. It is nasty aggressive stuff so wear all the protective stuff (including a mask)

3) Then when no too wet I used an angle grinder with wire brush attachment to remove what I could before it starts to melt. Once the bitumen gets too hot you end up pushing about the panel and you get nowhere. That's the time to stop and repeat step 2

#####

I tipped my PV on its side to remove the underside muck =>



https://www.volvoforums.org.uk/showt...277319&page=21

But then everything was stripped from the shell...

...and I mean everything. I wouldn't do this with things fitted (!)

[Thowdfella]

Thanks for the replies, I will update you al when completed.

[csm22]

You can soften/loosen the undercoating without resorting to torches (or napalm, etc.) by using a heat gun. For a pretty reasonable cost you can get a capable one that you'll use for all sorts of things. Makes removal of any sealant or adhesive (even petrified stuff) that much easier.