258 Crankcase Vacuum Fitting - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > 258 Crankcase Vacuum Fitting

FS: 2007-2013 Jeep Wrangler "HALO" Angel Eye KitRockridge 4WD IS Taking Zone Offroad Suspension Lift Kits End of Summer Sale, 20% OFF!

Reply
Unread 07-23-2013, 07:56 AM   #1
Hacken
Registered User
1987 YJ Wrangler 
 
Join Date: Sep 2012
Location: Thompsontown, PA
Posts: 16
258 Crankcase Vacuum Fitting

Can anyone Explain what this vacuum fitting is for and/or what it should be connected to? I have not found it in any vacuum diagram. It is located on the drivers side of the block just below the freeze plugs in front of the motor mount. I am going to try to up load the only picture of it i could find on line.

img_1563size-1.jpg  
Hacken is offline   Reply With Quote
Unread 07-23-2013, 08:22 AM   #2
Old4X
Registered User
1990 CJ7 
 
Join Date: Nov 2008
Location: Ga
Posts: 4,955
That is the CTO switch
__________________
418 miles on 19 gallons of gas. Can't beat the BBD !
Old4X is online now   Reply With Quote
Unread 07-23-2013, 08:23 AM   #3
roadyrob
Registered User
1987 YJ Wrangler 
 
Join Date: Apr 2007
Location: west palm beach fl
Posts: 1,784
how old is that motor? I'll take a WAG, it looks like a CTO port. your don't have one on your intake as it isn't water cooled so that must be it. can't tell you what it hooks to as mine is long gone.

late again! I've got to learn to type faster.
__________________
Do everything with a positive attitude, it won't always work but you'll piss enough people off to make it worthwhile.

the voices aren't real but they sure have good ideas.
roadyrob is offline   Reply With Quote
Unread 07-23-2013, 08:30 AM   #4
Old4X
Registered User
1990 CJ7 
 
Join Date: Nov 2008
Location: Ga
Posts: 4,955
http://home.sprynet.com/~dale02/cto.htm
__________________
418 miles on 19 gallons of gas. Can't beat the BBD !
Old4X is online now   Reply With Quote
Unread 07-23-2013, 08:35 AM   #5
Old4X
Registered User
1990 CJ7 
 
Join Date: Nov 2008
Location: Ga
Posts: 4,955
That is an ancient motor. That vac switch works like the CTO, but is for the choke heater IIRC. You have the old married style intake and exhaust manifolds and there is a heat exchange tube (that rusts out and causes a bad vac leak) that hooks to the hot air tube to the choke coil. That vac switch shuts off the heat once the engine is hot enough.

The elect choke cap replace all that junk.
__________________
418 miles on 19 gallons of gas. Can't beat the BBD !
Old4X is online now   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.