2014 5.7 leaking antifreeze - TundraTalk.net - Toyota Tundra Discussion Forum

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post #1 of 14 (permalink) Old 02-09-2017, 11:31 AM Thread Starter
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2014 5.7 leaking antifreeze

2014 5.7 95,000 miles
Engine is leaking coolant from rear running down both sides of the bell housing. I have looked with an inspection camera. No luck
Any advice would be appreciated
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post #2 of 14 (permalink) Old 02-13-2017, 07:57 AM
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Originally Posted by Mxquadracer15 View Post
2014 5.7 95,000 miles
Engine is leaking coolant from rear running down both sides of the bell housing. I have looked with an inspection camera. No luck
Any advice would be appreciated
Check out the post I have called 2011 5.7 coolant leak. I just fixed it this weekend. It was the valley cover gasket.
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post #3 of 14 (permalink) Old 01-01-2018, 11:02 AM
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I'm working on fixing this.
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File Type: jpg Coolant Valley Leak.jpg (204.4 KB, 89 views)

2008 DBL cab 5.7 TRD 4x4,
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post #4 of 14 (permalink) Old 01-01-2018, 11:44 AM
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I'm working on fixing this.
Easy fix, I have had no issues since I fixed mine.
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post #5 of 14 (permalink) Old 01-01-2018, 12:01 PM
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Originally Posted by lasallen View Post
Easy fix, I have had no issues since I fixed mine.
I ran out of time yesterday to take it all apart. What exactly causes the leak?

2008 DBL cab 5.7 TRD 4x4,
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post #6 of 14 (permalink) Old 01-01-2018, 12:10 PM
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Originally Posted by GIXXERKELLY View Post
I ran out of time yesterday to take it all apart. What exactly causes the leak?

Toyota did a poor job with the gasket material. Its nothing more than a version of permatex. You will just have to take the valley cover off, clean the old gasket off, and put permatex back on.
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post #7 of 14 (permalink) Old 01-01-2018, 12:13 PM
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Originally Posted by lasallen View Post
Toyota did a poor job with the gasket material. Its nothing more than a version of permatex. You will just have to take the valley cover off, clean the old gasket off, and put permatex back on.
Which type of Permatex did you use?

2008 DBL cab 5.7 TRD 4x4,
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post #8 of 14 (permalink) Old 01-01-2018, 09:29 PM
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Can someone give me suggestions on how to remove a couple of bolts? You can't see it in the picture but there is a bolt holding the Air pump to the valley plate where the red circle is. If I start backing it off it hits the head and I can't get it out.

The other problem is there is a bolt holding the back of the top black plate to coolant valley plate where the yellow circle is. If I start backing it out it hits the Air pump and I can get it out.

I have removed the 3 top bolts that secure the Air pump to the valley plate. I've tried to gently pry the air pump up to get some room but, the two metal pipes that mount to the side of it won't allow any movement.
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2008 DBL cab 5.7 TRD 4x4,
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post #9 of 14 (permalink) Old 01-02-2018, 05:17 PM
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Don't the Tundra have the pink stuff?
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post #10 of 14 (permalink) Old 01-02-2018, 06:05 PM
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Don't the Tundra have the pink stuff?
From the factory...yes.

2008 DBL cab 5.7 TRD 4x4,
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post #11 of 14 (permalink) Old 01-02-2018, 06:15 PM
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Originally Posted by GIXXERKELLY View Post
Can someone give me suggestions on how to remove a couple of bolts? You can't see it in the picture but there is a bolt holding the Air pump to the valley plate where the red circle is. If I start backing it off it hits the head and I can't get it out.

The other problem is there is a bolt holding the back of the top black plate to coolant valley plate where the yellow circle is. If I start backing it out it hits the Air pump and I can get it out.

I have removed the 3 top bolts that secure the Air pump to the valley plate. I've tried to gently pry the air pump up to get some room but, the two metal pipes that mount to the side of it won't allow any movement.

Its very hard, if i remember correctly it just took a while with a box end wrench.

Also, I used the black permatex to reseal the valley cover
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post #12 of 14 (permalink) Old 01-02-2018, 09:22 PM
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OK figured it out. I loosen the 2 bolts on the driver side metal tubing. Once that was free I was able to push the air pump back a little bit which gave me room to remove the bolt hitting the head and the other bolt holding the black top plate to the air pump.

2008 DBL cab 5.7 TRD 4x4,
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post #13 of 14 (permalink) Old 01-03-2018, 05:24 PM
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Fwiw, if anyone has to do this again, I would use HondaBond HT. Stuff is different than Permatex, it actually holds up better. Probably made by threebond.

Several small engine mfg's use silicone, Kohler being one of them. Their horizontals are notorious for the sump to leak. We switched over to HB and it holds up wayyyy better than permatex orange, black, blue, hell any other sealant I have used.

Even sealed a hole in a plastic radiator tank with it once.


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post #14 of 14 (permalink) Old 06-18-2019, 07:47 AM
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How do you remove the valley plate? I've removed all bolts and nuts, but it's held up on the pipe that go's in the large opening at the front
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