Heat Transfer - POR-15
Posted: Wed Jun 16, 2021 6:58 am
I've currently got a few Seagulls stripped down and giving their water galleries a really good scrub and flush out.
A couple of them are quite badly rusted - but not gone yet.
I am (carefully) sand-blasting them to get them as clean as possible and I'm looking at ways to extend their life-spans as long as possible.
Is anyone familiar with POR-15 (or the very similar Bill Hirsh Miracle Paint) Rust Prevention Pains.
I have had fantastic success with them on other applications but was wondering if anyone here has used them on Seagulls.
I am considering painting them with Rust-Killer type treatment, then coating them with POR-15 or Miracle Paint.
I am considering paining the inside of the water galleries with this stuff - from past experience, it will stop it rusting for many, many years. I would of course be careful not to allow it to gum up any of the holes through which the cooling water travels.
So the question is this:
Does anyone have any idea if these type of products will affect the heat transfer from the cast iron barrel/water galleries, to the cooling water?
With just cast iron - the heat will easily move from the hot cast iron, to the cool water.
But will a layer of POR-15 (or Miracle Paint) between the Cast Iron and the Water prevent or slow this heat transfer from occurring, causing the engine to run hot?
If it does slow the heat transfer, will it be significant enough to worry about?
Am I worrying about nothing??
Any other suggestions about how to "rust proof" as far as possible, the interior walls of these water galleries?
Just another thought - how about those Fuel Tank Sealers that are designed to seal and prevent rust inside fuel tanks?
Cheers
A couple of them are quite badly rusted - but not gone yet.
I am (carefully) sand-blasting them to get them as clean as possible and I'm looking at ways to extend their life-spans as long as possible.
Is anyone familiar with POR-15 (or the very similar Bill Hirsh Miracle Paint) Rust Prevention Pains.
I have had fantastic success with them on other applications but was wondering if anyone here has used them on Seagulls.
I am considering painting them with Rust-Killer type treatment, then coating them with POR-15 or Miracle Paint.
I am considering paining the inside of the water galleries with this stuff - from past experience, it will stop it rusting for many, many years. I would of course be careful not to allow it to gum up any of the holes through which the cooling water travels.
So the question is this:
Does anyone have any idea if these type of products will affect the heat transfer from the cast iron barrel/water galleries, to the cooling water?
With just cast iron - the heat will easily move from the hot cast iron, to the cool water.
But will a layer of POR-15 (or Miracle Paint) between the Cast Iron and the Water prevent or slow this heat transfer from occurring, causing the engine to run hot?
If it does slow the heat transfer, will it be significant enough to worry about?
Am I worrying about nothing??
Any other suggestions about how to "rust proof" as far as possible, the interior walls of these water galleries?
Just another thought - how about those Fuel Tank Sealers that are designed to seal and prevent rust inside fuel tanks?
Cheers