Coolant plug in the block
Old fart with a wrench
Joined: Nov 2010
Posts: 14,398
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From: Manlius, east of Syracuse, NY
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
My advise would be to order brass plugs with Allen hex key sockets in them or external male hex heads. Back in the 60's, GM used the external male hex head steel plugs, but I think they were 1/4" taper pipe.
Last edited by dave1123; Nov 17, 2019 at 02:18 PM.
Old fart with a wrench
Joined: Nov 2010
Posts: 14,398
Likes: 741
From: Manlius, east of Syracuse, NY
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
There's very little room behind the exhaust header and they tend to leak after a while, plus finding 3/8" ones may be difficult.
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CF Veteran
Joined: Mar 2015
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From: Northern CT
Year: 1995
Model: Cherokee
Engine: Turbo 4.0
The fitting will be a 3/8 hose barb. I currently run the set up, I needed to verify the thread size because I didnt include it in my notes for some reason.
CF Veteran
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From: East Tennessee
Year: 1996
Model: Cherokee (XJ)
Engine: 242 cui
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CF Veteran
Joined: Mar 2015
Posts: 1,203
Likes: 155
From: Northern CT
Year: 1995
Model: Cherokee
Engine: Turbo 4.0
This gets away from the stock side of this thread.
The block coolant runs into the bottom port of my turbo then up to the top and over to heater core inlet. Should keep a thermal siphon going after shutdown.
The block coolant runs into the bottom port of my turbo then up to the top and over to heater core inlet. Should keep a thermal siphon going after shutdown.
CF Veteran
Joined: Aug 2019
Posts: 1,601
Likes: 226
From: East Tennessee
Year: 1996
Model: Cherokee (XJ)
Engine: 242 cui
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