Blown Head Gasket?

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Model T Ford Forum: Forum 2014: Blown Head Gasket?
Top of pagePrevious messageNext messageBottom of page Link to this message  By Skip Wheeler on Sunday, September 14, 2014 - 11:16 am:

Yesterday I was working on the carburetor when suddenly there was a big backfire somewhere around the #4 plug. The engine suddenly was a 100 decibels louder and sounded like I had destroyed something. I quickly turned it off and started looking for a blown head gasket or some other abnormality. It took me a little bit to find it, but I finally did. Can you see what it was?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Tony Bowker on Sunday, September 14, 2014 - 11:31 am:

I can't see it, need a bigger picture!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Greg Whaley, Georgetown Ontario Canada on Sunday, September 14, 2014 - 11:33 am:

Kind if hard to see, but did you blow the exhaust pipe apart at the manifold?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Norman T. Kling on Sunday, September 14, 2014 - 11:34 am:

Must have been through the carburetor and a flame came through the heat pipe.

By the way, I see you have an in line filter. That could be the cause of the "carburetor" problem. Restriction of fuel flow will cause the carburetor to run lean and give symptoms of running out of gas upon acceleration.
Norm


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dan Treace, North FL on Sunday, September 14, 2014 - 11:40 am:

Agree with Greg.

From the looks of the manifold at #4, the exhaust manifold gasket may have been blow out, that will make a exhaust noise at that point.

Running with a blown or leaky exhaust gasket at #4 will compound over time, as all the exhaust ports run there too.


Worn away iron from bad manifold gasket over time and / or warped exhaust manifold.

As stated, running the engine lean will make the manifold glow red hot at that spot too, so make sure you have the carb adjusted correctly.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Skip Wheeler on Sunday, September 14, 2014 - 11:49 am:



You are correct George, the exhaust pipe came loose. It's a new to me car, so I'm not sure how it worked its way loose, but all I had to do was screw the muffler pipe back on. It was quite the relief that was the problem and not something more.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Skip Wheeler on Sunday, September 14, 2014 - 11:50 am:



You are correct George, the exhaust pipe came loose. It's a new to me car, so I'm not sure how it worked its way loose, but all I had to do was screw the muffler pipe back on. It was quite the relief that was the problem and not something more.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce in Georgetown TX on Sunday, September 14, 2014 - 12:18 pm:

The exhaust manifold nut needs to be tightened (or loosened) with the manifold HOT. You need a wrench like this to do it properly. You will never get it tight enough using a pipe wrench or channel lock pliers.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Kevin Pharis on Sunday, September 14, 2014 - 12:48 pm:

Is anyone else puzzled by the petcock holding in the cam bearing????


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Tomaso - Milton,WA on Sunday, September 14, 2014 - 12:52 pm:

I believe that petcock is just plugging a hole in the intake manifold.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Skip Wheeler on Sunday, September 14, 2014 - 01:02 pm:

I was confused by that peacock as well. I am learning as things go wrong.

Royce, where can I find that wrench?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Val Soupios on Sunday, September 14, 2014 - 01:47 pm:

You might want to use a bit of anti seize compound on the threads of the manifold when you reinstall it. It makes the nut thread on easier and definitely makes it come off easier. You can tighten the nut by hand first then a bit more with a big adjustable wrench or even large water pump pliers but to get it on all the way you should do it hot and with the proper wrench if possible. I struggled and managed to get by without the proper wrench for years but Now that I have one i realize I should have purchased one years ago.


Top of pagePrevious messageNext messageBottom of page Link to this message  By G.R.Cheshire on Sunday, September 14, 2014 - 02:01 pm:

Skip you can hang around swap meets or you could get this one.
http://www.modeltford.com/item/3061W.aspx


Top of pagePrevious messageNext messageBottom of page Link to this message  By David Stroud on Sunday, September 14, 2014 - 02:44 pm:

They turn up on ebay occasionally. Dave


Top of pagePrevious messageNext messageBottom of page Link to this message  By george house on Sunday, September 14, 2014 - 09:19 pm:

Skip,
I have one that I bought from Lang's many moons ago. You can use it. I'll drop it off in front of the barn in Gruene tomorrow. along with the MTFCA pamphlet on front and rear ends. You'll see a real good write-up on why your RF tire is scrubbing. Now, get to fixing your toe-in !!! ;o)


Top of pagePrevious messageNext messageBottom of page Link to this message  By Roger Karlsson, southern Sweden on Monday, September 15, 2014 - 04:02 am:

I couldn't get the exhaust nut to stay tight until I clamped a offset piece of sheet metal holding the nut:

norm's nut clamp
Drawing by Norm Kling - thanks for the idea :-)


Top of pagePrevious messageNext messageBottom of page Link to this message  By Skip Wheeler on Monday, September 15, 2014 - 07:27 pm:

Thanks George House! You've been a blessing and a great mentor.

A friend mentioned drilling through the nut and installing a set screw. That might be an easy permanent solution.


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