4.2 with no freeze plug aka core plug - Jeep Wrangler Forum

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Old 09-01-2013, 08:24 AM   #1
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4.2 with no freeze plug aka core plug

Hey everyone,
I picked up my 87 about a month and a half ago and drive it on weekends and don't rack up many miles but I noticed yesterday that I have no freeze plug?! Yet, I have no coolant leak. It also looks like its been missing for awhile since there is some sand and dirt residue in the hole. My radiator has coolant and the reservoir has coolant too...
I didn't think it was possible to have all of the above.
Any ideas?

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Old 09-01-2013, 10:29 AM   #2
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Old 09-01-2013, 10:32 AM   #3
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Are you referring to the hole below the front of the intake? If those that's for a preheater hose. It carries warm air to the carb
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Old 09-01-2013, 10:41 AM   #4
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that's for preheater to stock air breather doesn't look like stock breather on this rig
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Old 09-01-2013, 11:38 AM   #5
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Whew, ok so it's not needed at all? What about crud getting in the hole?
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