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Coolant leak


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Working on a 04 Jeep Wrangler with a straight six I'm Not on a wrangler form but seems to be pretty much the same thing under the hood. Replaced water pump coolant seems to be leaking out of but didn't help. 540997afb547149db82dcf1bd0ea1e2f.png69a6997b3f51c66819879ed95388233b.png

 

 

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Upload the video to YouTube then post the link. It looks like it's running down the backside of the belt and harmonic balancer so Id first check the hoses and thermostat housing for leaks. If it's not from there you likely aren't getting a good seal between the water pump and block. That's a very significant looking leak so you've got a decent size hole somewhere.

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Put a torch on it and tap it with a hammer a very little bit to help break it loose and use some pb blaster or similar penetrating oil. If you can, grind 2 opposing sides of the bolt flat so you can fit a wrench on it for more leverage. Just make sure you cover the holes in the engine to avoid getting any debris in there.

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Pardon the partial thread hijack, but a tip for preventing/minimizing the potential for broken bolts is to run a tap through the hole to clean and straighten the threads before re-assembly. This will also help in getting a better bond if you plan to use thread locker when re-assembling. Use a bottom tap in blind holes to reach as deep as possible. On studs, use a stiff wire brush if you can't run a die over the threads.

 

Be careful with Harbor Freight/Chinese taps as they may have problems with thread size and pitch as well as quality (they may be more prone to break off in the hole).

 

If a bolt is hard to thread in, don't keep cranking on it. Back out, see what's causing it and fix it. Takes less time than getting broken bolts out. Common sense, but we've all probably been guilty at some point of getting in a hurry and "saving time" by not cleaning or replacing dirty/damaged fasteners.

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Another trick I like to do, is to take a similar thread bolt and grind a "cleaning notch" into it. Then run that through. Doesn't remove anything but the debris in the threads. Comes in handy when a tap isn't readily available, and I keep them in the toolbox for future use.

 

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