Jeep 4 0l Engine Coolant Flow Diagram

With thanks to frank swygert the jeep 4 0 liter six cylinder engine provided good acceleration from low speeds in jeep wranglers and cherokees for years with high torque at low engine speeds.
Jeep 4 0l engine coolant flow diagram. It was used in other vehicles such as the grand cherokee as well a strong durable performer loved by its owners. How to identify diagnose and clean all parts and sensors of a jeep 4 0l throttle body. There s no flow direction required on a heater core so as long as the coolant flows through it. This information is applicable for all fuel injected models of the jeep wrangler tj grand cherokee zj.
2000 jeep cherokee 4 0l coolant flow direction. The pcm is the one that provides power in the form of 5 volts dc on the vio wht. From material by peter stern. Discussion starter 1 may 18 2009.
In the process of flushing the coolant system but having a bit of trouble. The map sensor needs power and ground to create a map signal. 1997 2006 jeep wrangler tj w 2 4l 2 5l or 4 0l engine 2007 2010 jeep wrangler jk w 2 8l diesel or 3 8l engine 1993 1998 jeep grand cherokee zj w 5 2l or 5 9l engine. The coolant bottle on my cj is on the driver side fender cowl facing the firewall.
We ve been advising customers on cooling since our company was founded in 1967 and this article is the concise culmination of the knowledge that we and many of our customers have earned on the topic. Omix oem radiator shroud for 74 81 jeep cj series with 3 8l or 4 2l engine 81 86 cj series with offset radiator cap 78 99 86 39 crown automotive water pump stud for 81 04 jeep vehicles with 2 5l 4 2l or 4 0l engine. I replaced the high pressure coolant bottle lines from heater core to block sending. Jump to latest follow.
The above map sensor wiring diagram applies only to 1993 1994 1995 4 0l jeep grand cherokee. I warm the engine up to open the t stat let it cool for an hour to even out hot spots and drain it. Jeep cherokee xj 1984 2001 2 5l 4 cyl engine cooling system jeep cherokee xj 1984 2001 4 0l 6 cyl engine cooling system. The heater hoses are usually routed from the bypass outlet and waterpump if the heater core is leaking.
Posted by 4 years ago. I am working on the cooling system in my jeep and have found out there is no coolant flowing through the lines. 2000 jeep cherokee 4 0l coolant flow direction. You might want to verify that.