New puddle

[Geok]

Started a coolant flush yesterday and woke this morning to a puddle under my transmission? It's a 2006 SE 2.4L 6spd. I emptied the radiator from the drain plug yesterday, used one container of Prestone flush and topped off with distilled water. Didn't touch any hoses and didn't have a leak before. Drove it for about 30 minutes after adding flush and parked it for the night. I can see the heater core hose comes out the firewall and goes behind the engine - and I hope that's not where its leaking from - but I don't know where else it could have sprung a leak? Oil looks good so I don't think I have a head gasket leak. I don't have a trans cooler.

 

[JKP]

If it's the heater core, it can leak out the AC drain on the firewall. Or were you running the AC?

 

[KennethS]

Yeah, high humidity will cause a lot of condensation out of the AC drain hose on the firewall.I have seen some vehicles that looked like they had a catastrophic leak just due to the condensation darn.

 

[Geok]

Not running AC - that's my next project after the cooling system. I just found it strange that the transmission was covered in coolant (I assume it was coolant - the puddle dried up so I know it wasn't oil). The trans is right in the middle/rear of the engine bay - so whatever leaked on it had to be right above it and the heater core is all the way on the passenger side and was bone dry. Only thing I could think was the heater core hoses that go from the core to the engine and somehow sprung a leak behind the engine? I really can't get a good look at them but I guess it could be leaking at a connection behind the engine?

 

[JKP]

The cowl drain is right above the transmission as well.

 

[Geok]

The cowl drain is right above the transmission as well.

Fingers crossed! OTW to get a pressure tester after reconnecting everything.

 

[Geok]

Still working on it. The lower radiator hose to block connection is pretty hard to get to and I don't think I have the hose on completely (new hose just placed). It seems to be leaking from that point when I pressurize the system. BTW - the Pittsburgh Radiator Pressure Tester is not very good for Jeep TJ's (or any Jeep/Chrysler/Dodge). It doesn't screw on for my radiator and requires a two piece clamp fit that leaks no matter what you do. Will be returning soon. It kept pressure long enough to see the leak near the lower rad hose/block.

 

[macleanflood]

I had zero issues with the HF pressure tester.

The lower radiator to block constant tension clamp is easy with these:

https://www.amazon.com/gp/aw/d/B003D3N7YW?tag=wranglerorg-20

-Mac

 

[Geok]

I had zero issues with the HF pressure tester.

View attachment 700705

The lower radiator to block constant tension clamp is easy with these:

https://www.amazon.com/gp/aw/d/B003D3N7YW?tag=wranglerorg-20

-Mac

A screw on adaptor would be easier and what I was hoping for. I fiddled with the HF and don't like it. I'll probably just rent one instead. I got these hose clamp pliers, but you're right, the remote ones would probably work better.

https://www.gearwrench.com/all-tools/hand-tools/pliers/3977-angled-hose-clamp-pliers

 

[JKP]

Remove the overflow tank and you can get in there with your pliers. Just replaced my hoses last week.