just me , but weeping at edges not uncommon ; depends if wet now after a drive . old weeping looks bad but may have been /is stable for years . Might be scratch or junk in cup bore etc I have a car , 60 Buick actually, flipped I out 30 years ago when I saw weeping/ rust right after purchase . Unbelievable amount of work to change, could not see how I could drive plug in so punted . Was summer driver for two years 20 years ago . Never added coolant after initial checkout , plug and rust still there But if you see evidence of leakage inside cup ,at cup fold plug is going/ gone , I have see that in ones removed. .. usually due to lack of changing coolant / rust prevention fades . I suddenly feel guilty Another aspect , I have had two disasters over core plugs both on disc type used in hemi (and I think early B block ?) Both times blew out in first 100 miles on new engine far from home . One on the block , one time small one in head casting. Today's mechanics/ machine shops have no idea at all how hard to hit them , cannot be done right imho in car . The hit is hard , dead center with BIG ball peen hammer , makes noticeable depression .( look at stock one) Many put sealant , may be smart but sealant will not hold plug in ( maybe old style permatex might help ?) Hot heads knows all this, they make a really cool SS and aluminum one I think has O ring . It is held on by toggle bolt arrangement , not a tight fit ,no hitting . Toggle bar spans hole inside block , bolt screws into it Love em, pricey , worth every cent vs sudden loss of all coolant from rebuilt engine, at 200 degrees (for first time) brand new . Happens when hot, (of course,) because of pressure rise But also ?the answer to change in car ?? if B same size , might help if it needs change . Maybe routinely after a new engine install put 18 psi on cooling system. I forget , this post reminds me Another approach if weeping is so called radiator sealant . No it does not " plug radiator" as armchair experts think . Very small particles seal up tiny spaces . Personally I 'd just touch up with antifreeze , see how much you add . A cup a year is noise? vs a new one put in wrong by a lame attempt in car . If cup type , yes brass ! ymmv J On Aug 22, 2026, at 11:55 AM, 'dave mason' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote: -- For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang --- You received this message because you are subscribed to the Google Groups "Chrysler 300 Club International" group. To unsubscribe from this group and stop receiving emails from it, send an email to chrysler-300-club-international+unsubscribe@xxxxxxxxxxxxxxxx. To view this discussion visit https://groups.google.com/d/msgid/chrysler-300-club-international/3261901A-EF43-4B19-90C5-4EB5EEF37550%40gradyresearch.com. |
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