Zinc anode radiator cap for aluminum radiators

[General_01]

Anyone know where you can get one of these? I found the ones at Summit and Jegs that you put in a 1/4 NPT, but I am looking for the radiator caps with the anode.

[elacruze]

Just because the subject has come up; one thing I _always_ do with every vehicle I own is use a digital multimeter to check the ground loop between the coolant and the negative battery post. You should have none! Especially with aluminum parts. A ground loop in the coolant will quickly erode any aluminum and even worse, brass parts you have in the system. (thermostats and sensors) An anode is a good idea in any case, but if the engine/frame/radiator/battery/alternator are all properly grounded to each other you will have no loop. Also, test for AC voltage across the battery terminals to verify alternator diode function.

Eric

[A383Wing]

Anyone know where you can get one of these? I found the ones at Summit and Jegs that you put in a 1/4 NPT, but I am looking for the radiator caps with the anode.

Check with a Marine-Boating store....they my be able to help....we had a company up here that had them....but they are gone.....

They were about $25 I think

[elacruze]

Don't know about the fitment-but i'll be looking into it myself pretty quick. Electrically speaking, I think I'd be more comfortable with an anode attached directly to the radiator, or engine block which screws in. I suppose they've researched it, though.

Roe Racing;

http://www.roeracing.com/ProductCart/pc/viewPrd.asp?idcategory=117&idproduct=70

[A383Wing]

Most Marine shops carry the screw in styles...1/4" to 1/2" pipe thread ones are the most common

[General_01]

Thanks guys. I talked to my cousin and he found them in his Dearborn catalog also.