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Here is a list of tools I use every day at the shop. Let me know if you use them too in the comments!
The 3.6-liter engine from Chrysler has become notorious for leaks, especially coolant. Coolant leaks can cause overheating, loss of heat in the cabin, and irreversible damage to the engine. In this article, we will look at a common coolant leak in the 3.6-liter engine.
What Jeep Wranglers have the 3.6-liter engine?
The 3.6-liter engine was introduced in the 2012 Jeep Wrangler models, and is still available today, in the 2022 models.
Frequently Asked Question:
Where do I find wiring diagrams and step-by-step repair procedures for Jeeps?
The best online resource I use is Alldatadiy.com.
I used it for this case study to find the correct procedure for this Jeep Wrangler.
What can happen if I lose coolant?
Here is a list of things that can happen if you lose all of your coolant.
You will lose heat inside your vehicle
A “low coolant” message may pop-up
Your vehicle will overheat
Where is the oil cooler/oil filter housing located?
The oil cooler/oil filter housing is located in the V of the 3.6-liter engine. It is below the lower intake manifold.
How do I stop my Jeep Wrangler from leaking coolant?
The only way to truly solve this coolant leak is to replace the oil cooler/oil filter housing.
Can you still drive with a coolant leak?
Driving with little to no coolant is bad for the engine.
The reason why is because the coolant is what keeps the engine from overheating.
If an engine overheats, it can potentially be destroyed.
Check out this other article about an oil leak from the oil cooler/oil filter housing in the 3.6-liter engine.
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Follow the steps in this video to see how to fix minor coolant (antifreeze) leaks in your 2004 Jeep Wrangler. Leaking coolant is one of the more common types of fluid leaks on Wranglers. Engine coolant (which is also called antifreeze or anti-freeze) moves through the inside of your Wrangler's engine and keeps it from overheating. Coolant can leak from the reservoir or from the hoses, in 2004 Wranglers with the 4.0 liter engine, coolant leaks are most likely to occur where the hoses connect to the engine. The video above shows you where the coolant reservoir, hoses and connections on your 2004 Wrangler Rubicon are located and the steps needed to fix minor leaks.
A few things to note about coolant is that it is sweet tasting and highly toxic, so it can end up in the dog's stomach pretty quickly. If you ignore a small coolant leak long enough, you will run out of coolant, which leads to an overheated engine and other serious, but highly avoidable, problems. In many 2004 Wranglers, an anti-freeze leak can cause the temp sensor to record high engine temperatures. Always protect yourself with safety glasses and gloves when working with the coolant on your Wrangler.