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69 440 (A/C) coolant leak?

Posted By: 70runner

69 440 (A/C) coolant leak? - 03/03/18 03:42 AM

Have a coolant leak, 69 Charger 440 with A/C, dripping from idler bracket lower bolt area. Does anyone know if either of the 2 idler bracket bolts enters a water jacket?
Posted By: charles6970

Re: 69 440 (A/C) coolant leak? - 03/03/18 04:26 AM

Yes.
obviously.
Posted By: NANKET

Re: 69 440 (A/C) coolant leak? - 03/03/18 09:37 AM

No they don't enter a water jacket. They are one inch deep and stop. But they do go through the water pump housing and attach it to the block. Could be heater hoses.

Here are pictures of an AC car with the idler removed and installed.

I'm working on a 1957 392 and I cannot believe how many bolt holes go into the water jackets. Crazy really.

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Posted By: fastmark

Re: 69 440 (A/C) coolant leak? - 03/03/18 02:46 PM

I fought my newly rebuilt 70 Charger 440 with a water leak dripping from the lower rad hose. Ended up being the thermostat housing leaking behind the AC compressor. Had to remove it to find the leak. They can leak from anyplace.
Posted By: RapidRobert

Re: 69 440 (A/C) coolant leak? - 03/03/18 06:06 PM

for diagnosing you can get a tank valve from O'reillys for less than $3 & screw it into the 1/8 NPT cooling temp sender port & pump it up to 10 lbs with shop air. some dish soap in a squirt bottle will help show bubbles.

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Posted By: 70runner

Re: 69 440 (A/C) coolant leak? - 03/03/18 06:30 PM

Thx all, appreciate replies. The air pressure test with temp sender port is great idea.
Posted By: mgoblue9798

Re: 69 440 (A/C) coolant leak? - 03/03/18 06:31 PM

Now that is a slick idea and I am kicking myself for not thinking about it before.
Posted By: RapidRobert

Re: 69 440 (A/C) coolant leak? - 03/04/18 05:54 AM

Bro I've been on here 13 yrs & I learn something new here EVERY day. there are many many off the charts extremely sharp/knowledgeable guys on here.
Posted By: bboogieart

Re: 69 440 (A/C) coolant leak? - 03/05/18 01:37 AM

Yep, works great.
I got the idea from Robert as well.
Smart fella. up

Be careful using the air though.
Radiator only holds up to about 16# in good shape.
Don't need near that for leak to show itself.
I used a hand held bicycle pump.
Posted By: RapidRobert

Re: 69 440 (A/C) coolant leak? - 03/05/18 04:16 AM

^^^ agreed, get several PSI in there/turn off the stereo/listen closely & you'll likely hear it
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