Ed Anderson wrote:

Paul,
    I found that Oven Cleaner worked well as far as getting oil and

carbon

off the rotors when I overhauled mine.  I was careful not to get it

on the

bearings so don't know if it would attack them.  But, it is readily
available.

Ed Anderson

That sounds like one of those great discoveries that can save a lot of
money. They want $16 a gallon for carb cleaner and it does not work

all

that well. Oven cleaner sounds exactly like the right stuff.

Thanks for the tip Ed. I will get some and try it.

Paul Lamar

Bulent Aliev wrote:

Oven cleaner is very potent stuff. Once I used it to strip the bottom

paint

from my sail boat. In about 20 minutes it was eating in the fiberglass.

Lucky

for me I did not leave it over night.

marc mularz wrote:

Paul; IIRC, oven cleaner contains some lye (NaOH) which would be harmful to
any aluminum that it may come into contact with.  I would definately check
the contents for lye before I put it onto any aluminum.  Hope this helps.
Marc 

It is mainly the iron rotors that we need to get the carbon off with oven cleaner. 

I was going to use my new abrasive blaster to clean the aluminum rotor housings 
with crushed walnut shells. 

BTW It appears there is a hard brown deposit on the rotor 
housings just in the area of the stock silicone Mazda inner water o-rings. 
Does anybody know what that is? I have a sneaking suspicion it is 
deteriorated silicone rubber. I will have to cook some silicone rubber
in the oven at 600 degrees F or so and see what happens.

Also BTW do any of you use Hylomar to hold those o-rings in? What does that 
look like when you take the engine apart after it has been in there and run 
for awhile. Mazda says use petroleum jelly and don't let any engine oil 
get on it when you are assembling the engine.

I checked my rotor housings for shrinkage they and they are fine.

Paul Lamar
 
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