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| | | Core Plug Sealing | Joined: Jun 2010 Posts: 1,080 Likes: 1 old hand | OP old hand Joined: Jun 2010 Posts: 1,080 Likes: 1 | So, discovered a core plug leak the other day. Drained the block, popped it out and now am awaiting the replacement to arrive (apparently, all of the stores in this area have only the 'deep' ones and mine was definitely shallow). Anywho, I have heard that some folks back in the day would coat the inside or backside of the plug (the part that will have coolant flowing past it) with something to cut down on corrosion over time. Essentially, if there is a barrier between coolant and metal the breakdown is less??
Any thoughts?
GO! | | | Re: Core Plug Sealing | Joined: Jun 2010 Posts: 18,286 Likes: 559 | Joined: Jun 2010 Posts: 18,286 Likes: 559 | A good mix of coolant will take care of that ....If you run a more water mix it will rust faster. At least 50-50.
SUNSHINE VANS-VAN DIEGO ADRENALIN BY THE GALLON & CHASIN RACIN ONE FOR THE DIRT & ONE FOR THE STREETS '93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB '92 CHEVY G30 454 BEAUVILLE EXT 146" WB | | | Re: Core Plug Sealing | Joined: Nov 2013 Posts: 3,692 Likes: 32 pooh-bah | pooh-bah Joined: Nov 2013 Posts: 3,692 Likes: 32 | Those plus can be had in brass. End of the corrosion problem.
I've been known to put a coat of copper seal on edge of the plug, to help assure sealing against the block. | | | Re: Core Plug Sealing | Joined: Jun 2010 Posts: 1,080 Likes: 1 old hand | OP old hand Joined: Jun 2010 Posts: 1,080 Likes: 1 | frscke.... thanks. that is what i have been reading - that the issue is with water not the coolant and the correct mixture is the key. i don't know what was done before we got her but after the new plug is in it will be all 50/50.
dyno... thanks. i've heard about the brass but will stick with steel and go with a correct mixture of coolant. | | | Re: Core Plug Sealing | Joined: Jan 2001 Posts: 2,964 Likes: 63 veteran | veteran Joined: Jan 2001 Posts: 2,964 Likes: 63 | The old-timers use to say to dump a pint of automatic transmission fluid in the cooling system to help with rust and keep the heater core from plugging. | | | Re: Core Plug Sealing | Joined: Jan 2018 Posts: 21 stranger | stranger Joined: Jan 2018 Posts: 21 | Another remedy along with using brass freeze plugs ( that is what they are called, but the openings were part of the casting process), distilled water should be the only water along with coolant used in the cooling system to avoid corrosion issues with the radiator and other internal surfaces in the motors and other paths of the coolant. | | | Re: Core Plug Sealing | Joined: Jun 2010 Posts: 1,080 Likes: 1 old hand | OP old hand Joined: Jun 2010 Posts: 1,080 Likes: 1 | Just realized I don't know that I updated what all went down with the replacement of the core plug. Here's the link to the blog post we did about it... Been another few thousand miles since then and so far all is good.... http://nikothenomad.blogspot.com/2018/06/annie-turns-30.html | | |
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