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View Full Version : How to remove 89 jeep 4.0L engine block plug?



greenchevy
04-24-2009, 01:42 PM
I have a 89 jeep wagoneer limited 4.0l inline six. The plug is located close to the end of the manifold where the flange for the pipe bolts together. I went to motible part stores and had no luck. i asked the jeep dealer ship and like usual they knew nothing. I found the replacement block plug at carquest. its different. The plug in the jeep sinks in and the plug i bought is similar to a bolt you just use a socket. the guy at carquest said to stick a extention in it but it wont fit. i've tried hex bits with no luck. what do i use?


http://i178.photobucket.com/albums/w268/greenchevy_2007/DSC01820.jpg

http://i178.photobucket.com/albums/w268/greenchevy_2007/DSC01816.jpg

Mudderoy
04-24-2009, 01:53 PM
Thanks for joining. If no one else has an answer for you soon I'll have a look on my 98. Hopefully it will be the same.

BlueXJ
04-24-2009, 02:47 PM
I can't tell in that fuzzy pic but I would guess that it is a torx fitting maybe a T 60 or so. I am not familiar with the particular plug you are trying to remove. What is it plugging. Oil or water drain or what. It seems to have a lever built onto it and I have no such plug in my FSM which BTW is for an 89.

Mudderoy
04-24-2009, 03:07 PM
Melissa don't you have one of these engines? Can you try and get a better picture?

Melissa
04-24-2009, 05:31 PM
Okay I tried to get a picture, but could not. It's the plug that is right next to these four soft bigger freeze plugs
http://i730.photobucket.com/albums/ww305/melreese83/HPIM0510.jpg

I was able to take a 3/8th drive ratchet and it fit right in there.


Oh, its a screw in fitting (Don't know the actual term) like this one but has the squared shape not the hexagon shape as the one in my picture ( sorry it's fuzzy too)
http://i730.photobucket.com/albums/ww305/melreese83/HPIM0511.jpg




What about drilling a hole and useing an easy out?

This is the best I can do to help out.

firehawk
04-24-2009, 06:51 PM
The brass plug your holding is simply a pipe plug. I would guess the plug shown in the OP is a "port" to an oil galley. Just a guess though.

I think from the OP pic the "lever" looking thing is just a web cast into the block/head.

Melissa
04-24-2009, 07:02 PM
The brass plug your holding is simply a pipe plug. I would guess the plug shown in the OP is a "port" to an oil galley. Just a guess though.

I think from the OP pic the "lever" looking thing is just a web cast into the block/head.

Don't know my shory hand, what does OP stand for?

My 3/8 rachet would have undone that particular plug on my motor, but I didn't unscrew it cause I don't know what it's plugging and I was right underneath it at the time
:headbag:

BlueXJ
04-24-2009, 07:07 PM
OP= Original Poster

If it is an oil galley plug you would have gotten a face full of oil. Anyone read why he wants to remove it anyway? Is it leaking or is he trying to replace all engine plugs with some nice brass ones or what.

greenchevy
04-24-2009, 07:08 PM
i wish my 3/8 rachet would fit. i can't get it to fit in the hole. It is the plug for the coolant in the engine block. it is the block plug for coolant when you flush the system. like i said my 3/8 rachet won't fit. its too big. i've tried hex and torx sockets nothing fits

BlueXJ
04-24-2009, 07:10 PM
Is it leaking or what? I have never removed mine for any type of coolant flush in the past.

Melissa
04-24-2009, 07:10 PM
What about drilling it and using an easy out?

greenchevy
04-24-2009, 07:18 PM
i'am changing the cylinder head and it says to flush the full system and to remove that plug. i bought another one to replace it but i can't get it out.

BlueXJ
04-24-2009, 07:21 PM
If it is indeed for the cooling system then I would drill it and then use an easy out to remove it. I would not recomend that for an oil passage as you do not want to chance any metel debris in the oil at all.

Moncheche
06-22-2011, 05:03 PM
Did you ever figure it out? I'm having the same problem. My 3/8 just won't fit!
:bang:

ParadiseXJ
06-23-2011, 05:52 PM
It's some kind of weird size. It's a coolant block drain plug.

It's the same size a the BA-10 drain and fill plug.

don't know if it's 5/16 or metric, but considering the BA-10 is French crap it's likely metric. I used a sacrificial extension 3/8" drive and ground down all four sides a bit until it fit, and it fit nicely. That tool has a special place in my toolbox.

steph74
06-24-2011, 09:18 AM
+1 on grinded down extension...
and -1 for calling it French Crap lol ;)

4.3LXJ
06-24-2011, 10:01 AM
You can grind down the extension, or there is a tool made for such things. But they are expensive. Snap On has them as well as Mac Tools I think.

ParadiseXJ
06-25-2011, 10:17 AM
+1 on grinded down extension...
and -1 for calling it French Crap lol ;)

Didn't mean to offend any French folks...but really, my tranny...it IS a BA 10-5, made by Peugot...and they are known to be less than optimum.:thumbsup:

The Aisan-Warner folks are going to be happy when I swap in that AW-4.

trakrxj
06-25-2011, 11:54 PM
I ran across this topic doing a google search for oil galley plugs, so I joined the forum to answer this 2 year old question, I dont remember the name use to identify the socket, it is 5/16 though. What I used was 5/16" key stock about 8" long and a adjustable wrench

K5ADT
12-13-2013, 07:58 PM
I used a cold chisel head (the side you hit with a hammer) and a big Crescent wrench.

ParadiseXJ
12-14-2013, 09:36 AM
I would hesitate to go whacking on it with a BFH and a chisel...

seriously, it's really quite simple to grind an extension down...then just screw it out...

I don't really get why people just start hackin' & whackin' on @%#$ when it's actually EASIER and smarter to remove it the right way. Then you can replace it with a regular hex head bolt.

K5ADT
12-15-2013, 12:32 AM
No you misunderstood me. Don't beat on it. The chisel is a square 5/16 hardened steel and fits exactly in the plug if you turn it backwards. Then use a big crescent on it.


Allen T.
88 Heep Cherokee

ParadiseXJ
12-16-2013, 10:57 AM
No you misunderstood me. Don't beat on it. The chisel is a square 5/16 hardened steel and fits exactly in the plug if you turn it backwards. Then use a big crescent on it.


Allen T.
88 Heep Cherokee.

Gotcha! Yes, I tried hat too, with a square stock punch, but I found that it did not quite fit, even at 5/16" (I measured it). I read about grinding down the extension somewhere...it worked for me.

:happy0180:

bulrid8
12-16-2013, 03:12 PM
HF has a drain plug kit pretty cheap. Looks like 3/8 ext, but all different sizes.

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