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03-25-2018, 05:53 PM | #1 |
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This can't be good?
Drained the radiator a couple of weeks ago and refilled with new coolant today and am now leaking fluid out of left side header flange. In my 221 had a erosion problem with the heads and was concerned may have happened in my 276 but when I removed thermostat housing and ran scope into head didn't see an an accumulation of crud as I did on the the 221. The engine never leaked water previously. Could head be leaking into one of my exhaust seats?
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03-25-2018, 06:00 PM | #2 |
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Re: This can't be good?
Header mounting bolt too long and went through the jacket when tightened down....
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03-25-2018, 06:12 PM | #3 |
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Re: This can't be good?
Used recommended header bolt kit installed many years ago with no problem.
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03-25-2018, 07:02 PM | #4 |
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Re: This can't be good?
Just checked dripping seems to have slowed down still have plenty of water in upper tank of radiator.
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03-25-2018, 07:12 PM | #5 |
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Re: This can't be good?
as a test. remove the bolt in the offending area and see if it leaks worse. I have seen several of these bolts pushed thru the block into the water passage and for some reason most are the ones above the starter
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03-25-2018, 07:42 PM | #6 |
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Re: This can't be good?
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03-25-2018, 07:44 PM | #7 |
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Re: This can't be good?
Don't put jd weld on it, you'll never ever get it out... EVER. Some high heat RTV would be fine.
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03-25-2018, 08:10 PM | #8 |
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Re: This can't be good?
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03-25-2018, 08:13 PM | #9 |
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Re: This can't be good?
You might be okay with some "never seize". Which I would do anyways on exhaust bolts. Hope it stops the leak for ya.
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03-25-2018, 08:44 PM | #10 |
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Re: This can't be good?
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03-25-2018, 09:17 PM | #11 |
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Re: This can't be good?
Either might work,and I only say might because this a internet analysis. Anti-seize helps to remove bolts later and due to the fact it's a liquid it will fill micro gaps. Anti-seize will fill little voids also and will allow you to remove bolts later. Maybe best of both worlds. Worth a shot. I would use anti-sieze first over RTV.
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03-25-2018, 09:22 PM | #12 |
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Re: This can't be good?
I used permatex , number 2, I believe, the one that hardens and it seems to have worked.
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03-25-2018, 10:00 PM | #13 |
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Re: This can't be good?
Blue loctite works really well for sealing leaks and you can still get the bolt out.
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03-25-2018, 10:43 PM | #14 | |
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Re: This can't be good?
Quote:
If you want an old school fix get some indianhead permatex, autozone carrys it or did. anti-seize covers both issues, maybe . Last edited by Tinker; 03-25-2018 at 10:52 PM. |
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03-26-2018, 12:56 AM | #15 |
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Re: This can't be good?
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03-26-2018, 01:26 AM | #16 |
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Re: This can't be good?
I see 3 different grades of NEVER SEIZE, regular grade, pure nickel and mariner's choice. Make any difference which one I use?
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03-26-2018, 01:55 AM | #17 |
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Re: This can't be good?
Since you don´t have anything else then iron involved it shouldn´t matter, the other is for copperfree aplications and marine use with washout issues.
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03-26-2018, 02:01 AM | #18 |
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Re: This can't be good?
I used the grade that came in a white can with red label. The product is gray in color sort of like plumber’s putty but more viscous. Both the male and female threads should be clean and dry for best results. It did a good job of sealing off the wallowed out threads in the bung on the radiator.
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03-26-2018, 10:15 AM | #19 |
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Re: This can't be good?
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03-26-2018, 10:28 AM | #20 |
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Re: This can't be good?
I would keep the stainless steel bolts. Don't use J-B Weld as others have cautioned, although with the heat of the exhaust, the J-B would probably fail eventually. I have had good luck with Loctite, 569 Thread Sealant.
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