International Full Size Jeep Association

International Full Size Jeep Association (
-   General FSJ Tech (
-   -   88 GW 5.9 Engine Block Heater Leak (

gl21133 11-16-2021 11:22 AM

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?

gl21133 11-16-2021 08:49 PM

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.

Tripwire 11-17-2021 07:57 AM

id just buy a new one?


'89_Wagon 11-18-2021 08:53 AM

5.9's came with an engine block heater? Is that aftermarket? Would love to see a picture.

babywag 11-18-2021 09:10 AM

dealer installed or aftermarket none came with one from factory afaik

letank 11-19-2021 02:26 PM

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

All times are GMT -6. The time now is 12:23 PM.

Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.