Chassis internal Waxoyl treatment

[cormorant]

Just about to have underside/chassis waxoyled and have been offered to have the chassis members drilled with 10mm holes to allow access for waxoyle treatment to be sprayed inside sections. The question is; as the chassis is still in pretty good "Nick" (apologies to Mr Smith) is this process worth the bother/cost i.e. does it;
1. weaken the chassis
2. unnecessarily expose the sealed inside environment?

or is the preventative precaution worth it?

Any thoughts/experience of this?

[culminator]

Good question, I'd be interested in doing this as well, so long as it's not detrimental to the integrity of the chassis.

[Ant.]

When I replaced my outriggers(which weren't too bad) , I cut the open and found that there was very little rust inside.

This does seem to go against the thought that they rust inside>out.

[yellowgriff]

This would be a huge weakspot in the chassis. If crashed this would be the first place to crease or fold up.. SORRY

[HRG]

They only ever rot from the outside in... I'd advise against opening the chassis up to the elements, you could inadvertently make matters worse.

[Pushrod-Power]

HRG said:

They only ever rot from the outside in... I'd advise against opening the chassis up to the elements, you could inadvertently make matters worse.

One of the Specialists who posts on here(cant remember who)said that of the outriggers they had changed internal corrosion was never a contributing factor to the problem.

Edited by Pushrod-Power on Wednesday 25th November 11:14

[rev-erend]

The usual issue with TVR chassis - is the exposed tubes coating brakes down (chips etc..) and rush forms and gets under the coating.

Removing and rust annually and repainting significantly helps the longevity of the chassis. The real problem comes if the rust gets to areas that cannot be gotten to to remove the rust and repaint..

[clive f]

I`d leave the chassis sealed, if the chassis internals are airtight it cannot rust.

[cormorant]

Thanks for all the contributions, confirms my own misgivings when the offer was made, I certainly will not be compromising the structure, just the usual annual underside waxoyle.

[Ballistic Banana]

I agree, although if it has been compromised already through rusting through somewhere else then it may be rusting on the inside too...food for thought...sorry

BB

[Derek Smith]

My car had a new chassis in 2002. Part of the 'package' was to have Dinitrol injected into the main chassis rails only. They are sealed with plugs.

My understanding is that the Waxoil/Dinitrol protection is intended for large box-sections in vehicles, such as sills, flitch panels and the like. A mechanic doing a service commented on the excellent condition of the chassis. When I boasted to him that the main chassis rails had injected rust-proofing he sort of looked at me in a pitying way and said: I've never known them to rust through from the inside.

Ruined the moment.

If the tubular chassis rails are not open to the air then they will not rust from the inside. Whilst there will be a certain amount of dampness inside when they are welded shut, the acidity will soon be exhausted.

What this seems to suggest is that the 'everlasting' chassis is a possibility. It just requires an awful lot of mucky work.