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SPF radiator petcock
I have an older Cobra (#373 Sept '98) and have not been able to locate the drain petcock found on most radiators. Up till now I have just pulled the bottom hose to drain the rad. I want to install a Zinc Anode in the rad and the preferred spot is to remove the petcock and replace with 1/4 NPT zinc anode.
I hope I do not have to pull the fans and shroud to do this. Any imput? Ray |
Ray, check for a threaded brass bung, driver's side, toward the bottom.
-Dean #747 |
Beware : metric threads here.
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more beware:
as you discovered, older cars did NOT have a rad drain petcock , such as my 156 ( built in 1996) .only way to drain mine is by removing the lower rad hose and even then it is not completely drained . sounds like your scenario, you might be looking for something that does not exist . Later build units ( and I dont know starting at which serial/chassis number ) had drain petcocks added as a running prodcution change . Bill |
Thanks to all that replied.
Looks like my car is early enough that it does not have a petcock. Did see a fan thermostat switch a couple inches up from bottom of rad. I wonder if there is a alternative way to introduce a zinc anode into my coolant system. For those that don't lnow this anode is designed to slowly carrode so the alum block/radiator doesn't. About every couple of years one would replace the anode. I hesitate to screw one into the block in place of the block petcock as this could cause an obstruction or perhaps a hot spot. Bill we have talked in years past on scof. I have been away for awhile over there. Any ideas or thoughts on this. I have heard that a good ground strap from rad to frame will help. Ray |
Somewhere I saw someone with a radiator cap with an anode in the center of it...Just search "radiator cap with an anode" and their all over the internet...Let us know what you find and buy...
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I know this is not helping you find it but boat owners have been using sacrafices for years. Check your local auto store Blas said. I bought one and put it in my Caddy; it was nearly gone in one year.
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I bought one of the cap type ones from a place I found in the Drive magazine. I didn't fit right, so it keep leaking. It now sits in my box of spare parts.
Scott |
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