Rust Converter on Engine Parts

[edd_barker]

Keeping this separate as may be useful info if I end up testing it...

I've cleaned and stripped the paint off my sump in prep for repainting onto the rebuilt engine. As is often the case there was areas of pitting, some too deep to remove all the rust with the wire brush. So I've applied two coats of 'Neutra Rust 661' which is the usual blue milky liquid that turns the rust black, and leaves a latex coating to protect against future corrosion. I will topcoat with engine paint designed to withstand heat up to 200C.

I am wondering if anyone else has done this before, and did the anti-rust coating withstand engine heat? Its not entirely clear on the instructions what the temperature range is, the closest wording I can find is:

"Application Temperatures:
Should not be applied to cold metal at of below the dew point or hot metal above 40°C {10S"F}. The coating gives excellent protection at temperatures between •50"C (•50"F) and 50°C (112°F) continuous use. "

Which I am taking to mean that 50C is the maximum temp, but no suggestion as to what will happen if that temperature is exceeded....

I am also not sure what temperature the outside surface of the sump is likely to get, I know the oil ranges from around 80C to 100C.

If no one has any previous experience I will wait until the wife is out then stick it in the oven at 110C and see what happens! I'd love to avoid this though, in case anything I cook in there in the future has a curious aftertaste....

Thanks,

Edd

[bmcecosse]

It's usually got more than enough oil on it to prevent any rusting...... I'm sure it will be fine. It's banging along the 3 ply that does in sumps........

[edd_barker]

I'll just be mildly irritated if all my new paint peels off, especially as I've bothered to strip it back to bare metal!

[IslipMinor]

I use an aerosol enamel BMC/MOWOG Green engine paint over reasonably well prepared surfaces on the engine, and have never had any problems of paint peeling anywhere on the engine. On the tin it is described as 'Engine Block Paint' and then as a 'high temperature paint', but no actual details given. Usual requirements of clean and dry and don't use in either damp or cold conditions.

On a track day the oil temperature will get to ~120°C, but the head will likely experience higher temperatures than that, and still no problems with the paint. Looking on their website it quotes that the paint 'resists heat to 200°C', so that is maybe why?

This is the website:
http://www.militaryvehiclepaint.co.uk/i ... 6#products

They currently only list a 500ml tin in BMC Green, but I got 2 aerosols from them a year or so ago, and there are still listing aerosols for other colours.