Engine Tin Restoration Options

[Aayala]

Hello all, kept trying to look in the forum for hopefully an old article of someone going through this but no luck. I am in the process of having my cylinder heads vapor blasted and about to send the case over for machining and removing of the welded oil galley plugs.

I am left with all of the other rusty engine tins, cylinder head covers, fan housing, brackets, etc...



What is the best way to tackle all of these to restore them properly? Is a chemical bath a good way to go about it and efficient? I have someone that can do this locally but not sure if there is any concern about this? I was thinking of painting them after the bath with some rust prevention like a paint primer and then hitting with some coats of flat black paint or just rustoleoum paint.

Any recommendations on what is the most efficient? or is elbow grease and some brushes the way to go?

and any paint in specific you all have used? maybe for cooling purposes not that the engine tin should get that hot?

thanks in advance!

[TRP]

I called around down here where I am located, to have the tins stripped and powder coated black is a few hundred bucks. I could do it with the paint I purchased, but with trying to find the time to do it?... I'm dropping everything off on Friday.

What's the collective wisdom on the fan shroud? I don't think it's intended to be a heatsink / meant to pull heat away from the motor in any respect. Is there anything wrong with having the fan housing media blasted and cera-koted? A quick search shows mixed opinions.

Thanks for your wisdom here (I hope it's cool to piggy back on the original thread here...)

[wonkipop]

I called around down here where I am located, to have the tins stripped and powder coated black is a few hundred bucks. I could do it with the paint I purchased, but with trying to find the time to do it?... I'm dropping everything off on Friday.

What's the collective wisdom on the fan shroud? I don't think it's intended to be a heatsink / meant to pull heat away from the motor in any respect. Is there anything wrong with having the fan housing media blasted and cera-koted? A quick search shows mixed opinions.

Thanks for your wisdom here (I hope it's cool to piggy back on the original thread here...)

whether its intended to be a heat sink or not,.......it is naturally.
but not when the engine is running.
its always cool due to the air running through it.
but on hot shutdown, given its magnesium alloy, the heat flow from the cylinders and aluminium alloy crank case naturally is conducted to it (and the gearbox).
gets hotter than anything else. loses that heat naturally through radiation but it does draw it away from the main body of the engine. also naturally radiates at the fuel pump etc - hence the cause of the old vapor lock problem?

i notice folks seem to paint the fan shroud when they restore.
personally i prefer the raw metal finish. i think originally from factory they had a cosmoline or similar wax finish. which melts away over time and is long gone on all the engines.

anyway. if you paint the fan shroud needs to be a heat resistant paint or finish.

the tins are black for a reason. they are black box radiators that do not reflect heat (IR) back at the cylinders. black absorbs heat. it naturally radiates it away on its cooler side (the upper side). at minimum the side facing down at the cylinders should be black.
i've seen tins painted all sorts of colors. i wouldn't do it. its black for a good reason.