POR 20 and Bolt Lengths...

[chris1972]

Sounds a strange combo, but I'm going to paint my manifolds. The stuff arrived today. So what say three, spray or brush???

Also, what bolt lengths go into what holes on the manifolds? I only noticed after taking them out, but there are two different lengths of bolt. Same with the studs I have to replace them!

Anyone?

[phazed]

All my ARP replacement bolts are the same length.

[GasMunkey]

I got a video of Peters expensive manifold coating,

Want to see it?

[chris1972]

GasMunkey said:

I got a video of Peters expensive manifold coating,

Want to see it?

[chris1972]

phazed said:

All my ARP replacement bolts are the same length.

I'm assuming that the shorter bolts go underneath, where the manifold fouls removal.

[phazed]

GasMunkey said:

I got a video of Peters expensive manifold coating,

Want to see it?

Feck off!

My engine's a sore subject.

[chris1972]

[Bassfiend229hp]

phazed said:

GasMunkey said:

I got a video of Peters expensive manifold coating,

Want to see it?

Feck off!

My engine's a sore subject.

At least it's only your engine that's sore...

[chris1972]

So, spray or paint anyone? Any idea on the ratio of thinners to paint if I spray?

[Bassfiend229hp]

I'd have thought brush...

Phil

[GasMunkey]

BBQ paint is the best cheap solution

[chris1972]

Painted on POR20 Aluminium in the end. Finished painting today, although I'm tempted to give a third coat. I've bought POR15 for the rocker covers and plenum, but will spray that on. Much smaller and more straight forward!

[phazed]

Have you fired her up yet?

Alex, you can post that clip of my suberbly treatet manifollds, anything for a laugh!

[cogrog]

chris1972 said:

Painted on POR20 Aluminium in the end. Finished painting today, although I'm tempted to give a third coat. I've bought POR15 for the rocker covers and plenum, but will spray that on. Much smaller and more straight forward!

I would be very interested to find out how POR20 performs as i would like to clean up my manifolds but am a bit unsure if POR20 will cope?

[chris1972]

I think Daz did his if I'm not mistaken... thought I read it on some other post.

However, POR 20 is meant to be rated to 1400 degs F.

[portzi]

chris1972 said:

Painted on POR20 Aluminium in the end. Finished painting today, although I'm tempted to give a third coat. I've bought POR15 for the rocker covers and plenum, but will spray that on. Much smaller and more straight forward!

I had my manifolds sand blasted first to get the rust off and key them up ready for painting. I believe the Por heat resistant paint needs to be thinned down first as it says on the tin, but when i showed it to the painters who sprayed them for me, they advised that it was not necessary to add the amount of thinners as advised. The paintshop applied three coats of POR onto them with drying time inbetween. Then I left the manifolds for 2 days before i put them in our heat treatment ovens in work to bake. The smell was hunrendous that it gives off and is lethal is breathed in so be careful, mask up when you are curing them, on or off the car. I have had them fitted now for about 6 mouths and the only peeling I have had was on the "Y" piece top a couple of mm's, and on one place only 2-3 mm of peeling on the manifolds, so I just touched them up with a brush and all has been great since. I still have over half a tin left. So I can recommend this stuff, although it has no thermal properties to stop heat getting into the engine bay, but it makes the manifolds look great.

Mark

[chris1972]

It actually says on the POR website that it adheres best to rough/ rusty surfaces. I washed the manifolds first to remove any grease. dirt etc and then treated with POR Prep & Ready for about 20-30 mins, rinsed with water and allowed to dry. I then applied three brushed coat, with 24 hours drying between them. You don't need to thin if you're brushing it; however, I'm going to do my plenum and manifold in POR15 so will thin and spray that for a more even finish.

[portzi]

chris1972 said:

It actually says on the POR website that it adheres best to rough/ rusty surfaces. I washed the manifolds first to remove any grease. dirt etc and then treated with POR Prep & Ready for about 20-30 mins, rinsed with water and allowed to dry. I then applied three brushed coat, with 24 hours drying between them. You don't need to thin if you're brushing it; however, I'm going to do my plenum and manifold in POR15 so will thin and spray that for a more even finish.

Hi Chris,
Thats a interesting point about leaving them rusty and rough? It will be good to hear about your results after the baking time. I suppose getting the loose rust, dirt and grease off the surface, is all thats required really.

Mark