Question for 87-90 Renix 4.0 experts. Odd casting mark with pics.
06-05-2011, 11:39 PM
#1
Member
Thread Starter
Join Date: Jul 2009
Location: Genoa City, WI
Posts: 176
Likes: 0
Received 0 Likes
on
0 Posts
Year: 89
Model: Cherokee
Engine: 4.0
Question for 87-90 Renix 4.0 experts. Odd casting mark with pics.
I helped a my buddy swap his worn out 4.0 from his '87 cherokee to a reman Mopar 4.0 unit. Im pretty familiar with jeep straight 6's and have seen a lot of them. Once we pulled his motor out and it was on the hoist i noticed it had some wierd "BT" casting on it. Thought nothin of it and then looked at the 2 other renix era 4.0s that i have laying around. Its not on them. It is a fairly large casting of the letters "BT" in the side of the block. Its on both the driver and passenger side of it and is even in the end of the serial number in the side of it. I'd like to know what it means. Anybody know???
06-05-2011, 11:41 PM
#2
Member
Thread Starter
Join Date: Jul 2009
Location: Genoa City, WI
Posts: 176
Likes: 0
Received 0 Likes
on
0 Posts
Year: 89
Model: Cherokee
Engine: 4.0
Oh, forgot to add that it is also cast into the bellhosing area behind the flywheel to the left of the rear freeze plug. The block also has a petcock drain in one of the block plugs seen in the one pic which i normally see on boat engines???
Last edited by jeepjerry; 06-05-2011 at 11:45 PM.
06-06-2011, 09:54 PM
#5
CF Veteran
Join Date: May 2008
Posts: 3,018
Likes: 0
Received 17 Likes
on
17 Posts
Year: 1988
Model: Cherokee
Engine: AMC242
The drain valve was probably added - I've been wanting to do the same thing myself.
The "BT" may be a revision or version designator - I don't know what else it may be yet. It's definitely an AMC mark - not the AMC logo in the second picture (RENIX blocks started changing from AMC casting to the MOPAR Pentastar in late 1988.)
That's my best guess.
The "BT" may be a revision or version designator - I don't know what else it may be yet. It's definitely an AMC mark - not the AMC logo in the second picture (RENIX blocks started changing from AMC casting to the MOPAR Pentastar in late 1988.)
That's my best guess.
06-06-2011, 10:43 PM
#6
Member
Thread Starter
Join Date: Jul 2009
Location: Genoa City, WI
Posts: 176
Likes: 0
Received 0 Likes
on
0 Posts
Year: 89
Model: Cherokee
Engine: 4.0
It has been bugging me....
Ive spent an hour or two searching around the internet and came up with nothing. I searched around comanche club too.
The block drain would come in handy thats for sure.
Ive spent an hour or two searching around the internet and came up with nothing. I searched around comanche club too.
The block drain would come in handy thats for sure.
06-06-2011, 11:05 PM
#7
CF Veteran
Join Date: Mar 2010
Location: Broward County Fl.
Posts: 47,923
Likes: 0
Received 30 Likes
on
29 Posts
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
another strange thing the two different size freeze plugs the little sign on the side means AMC american motors corporation
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
MidwestNick
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
10
02-28-2016 02:05 AM
jmarzo
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
09-02-2015 08:29 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)