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Unread 12-05-2011, 03:18 PM   #1
LOT3
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Freeze Plug

Has anyone replaced the rear freeze plug closest to the firewall? I am trying to go through the firewall from the inside to install a steel plug.. any suggetions would be greatly appreciated..

thanks:

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Unread 12-05-2011, 06:20 PM   #2
Rmart30
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i dont think I would try to go thru the firewall.... you can get a rubber expansion plug at most auto parts stores to go in place of the freeze plug and they work quite well..no hammering in , just install and tighten the nut to make it expand. 20 min job if ya already got old freeze plug out.
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Unread 12-05-2011, 10:10 PM   #3
Rob K
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There was someone on the forum that was using the rubber expansion plugs in the back of the head. They kept blowing out. Wish I could remember the thread. I think they finally pulled the head and put a metal one in.
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Unread 12-06-2011, 07:42 AM   #4
Rmart30
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Quote:
Originally Posted by Rob K View Post
There was someone on the forum that was using the rubber expansion plugs in the back of the head. They kept blowing out. Wish I could remember the thread. I think they finally pulled the head and put a metal one in.
I would try one before I pulled a head or tried to cut thru a firewall. I have used many of the expansion plugs over the last 20 years on everything from automotive up to V 12 Detroits and only had one blow out and it was my fault because it was the wrong size.
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Unread 12-06-2011, 04:17 PM   #5
cruiser54
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They used to make a brass one with a stud and nut in the middle, in various standard sizes. Tighten the nut and it expanded out tightly.
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Unread 12-06-2011, 04:34 PM   #6
Diamond-x
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A few suggestions:

Pull the engine out and do it correctly, unless you have good access to the plug thru the FW.
Use a brass plug, as mentioned previously.
Use a bit of lock-tite around the plug before installing.
Use a large socket that fits just inside the lip of the plug and hammer it home.
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Unread 12-06-2011, 06:13 PM   #7
LOT3
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i appreciate the replies... i have put the rubber adjustable plug in ---it keeps blowing out. taking the dash apart probably took as long as it would have taken to pull the engine !#@$@#.. i think i have to try the firewall direction.. unless i have problems with the heater core! i will update as i proceed.. thanks again for all the input.. all suggestions are apprecated
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Unread 12-06-2011, 06:33 PM   #8
Carves
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Quote:
Originally Posted by LOT3 View Post
Has anyone replaced the rear freeze plug closest to the firewall? I am trying to go through the firewall from the inside to install a steel plug.. any suggetions would be greatly appreciated..

thanks:

Yep .... Had it on a hoist doing some stuff .... angled the back of the motor enough to get at the block and head, welch/freeze plugs.

Gearbox was out at the time ... remove the fan blades too.

Personally .... I'll be ripping the engine out next time ...

Theres a bunch of writeups around ... gojeep and others.

If one needs doing ... they probably all ( 7 ) do
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Unread 12-06-2011, 10:01 PM   #9
ChiliPepperXJ
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Did mine last summer...just went ahead and pulled the engine..some pics can be seen in my build thread....good luck! ha
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Unread 12-12-2011, 09:53 AM   #10
LOT3
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Success! The good news is with 2 people dash removal to the firewall can be less than a hr job! Created a access port to easily access the freeze plug, tried the rubber expandable plug but could not get it to seal properly because of the contour of the head.. went back in with a brass freeze plug and no leaks (so far).
after trial & error arpox 3 hr job
Thank for all the help and advice-
unfortunately no pics – someone stole my camera..
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