Exhaust tidy up - what to do
Discussion
I have my exhaust off at the moment due to a clutch change and am wondering what's best to do before I re-install it. It is a bit rusty in the back section, front and box are OK and the end tubes have polished up nicely.
Some options I was mulling over are:
Remove the worst of the rust, wipe it down and fit-and-forget.
Remove the rust, treat it with something like Kurust and fit-and-forget.
As above but after the Kurust paint it before fitting.
If people recommend the painting route then what's a sensible option? I know there are plenty of high temp exhaust spray paints but would a brush option be better? There is even a Rust-Oleum BBQ brush on stove paint that is good up to 600 degrees C.
I'm just after a pragmatic approach as I'd like to get the car back on the road in June. Enclosed as some pics and I've rust treated the hanger onto the block. I've already tidying up the underside exhaust pan and have new isolating rubbers to fit when re-installing.
Some options I was mulling over are:
Remove the worst of the rust, wipe it down and fit-and-forget.
Remove the rust, treat it with something like Kurust and fit-and-forget.
As above but after the Kurust paint it before fitting.
If people recommend the painting route then what's a sensible option? I know there are plenty of high temp exhaust spray paints but would a brush option be better? There is even a Rust-Oleum BBQ brush on stove paint that is good up to 600 degrees C.
I'm just after a pragmatic approach as I'd like to get the car back on the road in June. Enclosed as some pics and I've rust treated the hanger onto the block. I've already tidying up the underside exhaust pan and have new isolating rubbers to fit when re-installing.
Personally I’d flap wheel it all off and the apply a vht paint. I can’t recommend one though sorry.
I looked at mine last week and considered doing it but I just couldn’t be bothered and bolted it back on!
The standard pistonheads response is obviously put it in the bin and put a stainless cherry bomb exhaust on it !
I looked at mine last week and considered doing it but I just couldn’t be bothered and bolted it back on!
The standard pistonheads response is obviously put it in the bin and put a stainless cherry bomb exhaust on it !
Flap wheel and wire cup brush in a grinder will clean it up ready for painting.
I used Interterm 50 by international paints as we had some at work.
This was in 2010 and the main exhaust still looks as new today.
It lasted for about 5 years on the manifolds and y-piece, so the next time i need to remove the y and the manifolds i will clean and paint them again
.
I used Interterm 50 by international paints as we had some at work.
This was in 2010 and the main exhaust still looks as new today.
It lasted for about 5 years on the manifolds and y-piece, so the next time i need to remove the y and the manifolds i will clean and paint them again
.
Belle427 said:
Most of the heat will be concentrated in the manifolds and y piece, that paint looks very good though.
How hot does the exhaust run in normal use?
Don't know how hot the exhaust runs but the paint can withstand temps up to 540C or [1004 F ]How hot does the exhaust run in normal use?
Info on the paint in the link. ....................................... Looking on the net it is not cheap.
https://www.international-pc.com/product/interther...
TJC46 said:
Belle427 said:
Most of the heat will be concentrated in the manifolds and y piece, that paint looks very good though.
How hot does the exhaust run in normal use?
Don't know how hot the exhaust runs but the paint can withstand temps up to 540C or [1004 F ]How hot does the exhaust run in normal use?
Info on the paint in the link. ....................................... Looking on the net it is not cheap.
https://www.international-pc.com/product/interther...
I used Victas cans @£12.60ish on my manifolds and Y section as it had the highest claimed temp resistance. was untouched in the year I left them on. The key is in the prep and the cure once coated from what I read. I baked them off in a home built cabinet heated with BBQ charcoal. I had the manifolds media blasted to clean them by a local place for only £30.
Thanks everyone for the suggestions. In the end I went with the flap wheel, rust converter, second rub down with 120 grit and then for paint I went with a brush on type Rust-Oleum Stove & BBQ Silver Paint (£10). I know there are a lot more specialist paints out there but I need to be careful with costs in the current situation. I like the Rust-oleum paints and have used CombiColor on the chassis which copes well with the temperatures near the manifolds.
Anyway, I can see why people have problem with the VHT type paints coming off, be it on manifolds or exhausts. It is a funny type of paint, that doesn't particularly like to stick to anything but a very rough surface. The more pitted the surface the better it stuck. I brushed it on well and let the first coat set overnight. The second coat didn't go on easily either and kept pulling at the first coat causing balling of the paint. It needed some extra lacquer thinners to even things out and ensure a smooth layer.
I know it's only an exhaust...
So, left it overnight, refitted the exhaust and ran the car up to temp. All sorted, paint stuck very nicely after a few miles of heat, not as smooth as can be but I have to keep reminding myself so long as it keeps the water and muck off then it's doing its job. I'll update this thread next time I have the exhaust off to see how the paint fared over time.
Anyway, I can see why people have problem with the VHT type paints coming off, be it on manifolds or exhausts. It is a funny type of paint, that doesn't particularly like to stick to anything but a very rough surface. The more pitted the surface the better it stuck. I brushed it on well and let the first coat set overnight. The second coat didn't go on easily either and kept pulling at the first coat causing balling of the paint. It needed some extra lacquer thinners to even things out and ensure a smooth layer.
I know it's only an exhaust...
So, left it overnight, refitted the exhaust and ran the car up to temp. All sorted, paint stuck very nicely after a few miles of heat, not as smooth as can be but I have to keep reminding myself so long as it keeps the water and muck off then it's doing its job. I'll update this thread next time I have the exhaust off to see how the paint fared over time.
Gassing Station | Chimaera | Top of Page | What's New | My Stuff