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Old 11-16-2021, 11:22 AM
gl21133's Avatar
gl21133 gl21133 is offline
230 Tornado
Join Date: Aug 20, 2021
Location: Idaho
Posts: 2
88 GW 5.9 Engine Block Heater Leak

Per the title I've got a coolant leak, appears to be entirely coming from the engine block heater. It has a hex fitting in the center, I was able to tighten this maybe 1/8 turn but it's still got a few drops this morning. I take it this is just pressed into the freeze plug hole, right? Remove, clean, replace?
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Old 11-16-2021, 08:49 PM
gl21133's Avatar
gl21133 gl21133 is offline
230 Tornado
Join Date: Aug 20, 2021
Location: Idaho
Posts: 2
Possibly dumb question; for a short while would it be dumb to deal with rtv? Just on the outside until I can properly swap it.

Last edited by gl21133 : 11-16-2021 at 09:13 PM.
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Old 11-17-2021, 07:57 AM
Tripwire's Avatar
Tripwire Tripwire is offline
hey,does anyone here know how to.......
Join Date: Jul 30, 2000
Location: WA State
Posts: 4,656
id just buy a new one?

Abort? Retry? Ignore? >

86 GrandWag. Howell fuel Injected 360. MSD Ignition + Dizzy. 727/229 swap BJ's 2" Lift and 31's

88 Wrangler 4.2, Howell TBI and MSD - Borla Headers w/ Cat-back + winch and 31's AND a M416 trailer (-:
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Old 11-18-2021, 08:53 AM
'89_Wagon '89_Wagon is offline
232 I6
Join Date: Jan 01, 2019
Location: New Hampshire
Posts: 145
5.9's came with an engine block heater? Is that aftermarket? Would love to see a picture.
'89 Grand Wagoneer
AW4 Swap
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Old 11-18-2021, 09:10 AM
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babywag babywag is offline
out of order
Join Date: Jun 08, 2005
Location: Land of froot loops and cukcoo-nuts, CA
Posts: 10,156
dealer installed or aftermarket none came with one from factory afaik
88 GW, 67 J3000, 07 Magnum SRT8
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Old 11-19-2021, 02:26 PM
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letank letank is offline
AMC 4 OH! 1
Join Date: Jun 03, 2002
Location: San Francisco
Posts: 4,091
here is a pict, not mine,

I have a similar one on the 85, and yes it was dripping 20 years ago... I was told to smack it with a punch and it would dislodge... nahhhh, did not happened...

I poured some coolant leak repair powder... and yes, the coolant temp was a bit higher, I drove it for about a month, then drained a bit of coolant, may be a few quarts... temp was still a bit high and drained another few quarts... and the leak never came back...

Of course in 20 years I replaced the water pump, drained the coolant a few times... still leak free
74 wag, 349Kmiles on original ticker/trany, except for the rust. Will it make it to the next get together without a rebuilt? Status: needs a new body.
85 Gwag, 229 Kmiles. $250 FSJ test lab since 02, that refuses to give up but still leaks.

See Ouray 2013, Engine bits and Fuel and brake lines, and Body work
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