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Ford 9N, 2N & 8N Discussion Forum

Intake/Exhaust Manifold

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chucktn

07-20-2006 06:36:10

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Would a loose or bad gasket on the intake/exhaust manifold cause a 52 8N side mount to blow a white mist out the exhaust pipe when first started. This typically happens after the tractor has sat for a couple of days and clears up immediately after starting. I also noticed for the first time the other day a small pin head size drop of green antifeeze directly below the exhaust pipe where it makes the turn from the engine to run to the back. Good compression and stays consistent no loss of power but the oil is milky. It doesn't appear to be leaking anything from around the head gasket. I've run it up to operating temp just to see if it cleared the oil. I pulled the head about 4 months ago, everything looked good, replaced the gasket and everything has been fine until last week. After changing the oil cranked the tractor (40 psi) and noticed the puff of white mist when started. Thoughts??

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flathead

07-20-2006 13:11:00

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Re: Intake/Exhaust Manifold in reply to chucktn, 07-20-2006 06:36:10

When you replaced the head gasket, did you retorque the head nuts(or bolts) after running it awhile?

flathead

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chucktn

07-20-2006 14:50:08

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Re: Intake/Exhaust Manifold in reply to flathead, 07-20-2006 13:11:00

Yep sure did. Torqued to the amount specified in the manual then after about 10 hours went back and checked them.

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Rush-N

07-20-2006 12:17:32

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Re: Intake/Exhaust Manifold in reply to chucktn, 07-20-2006 06:36:10

Chuck, I had the same problem last month and I followed Hobo's advice in the order Hobo had mentioned, and all went well. One thing I might add is to check to see if you have coolant/water in your motor oil. If you do, I would drain the oil overnight and after ALL the milky motor oil is drained see how much coolant/water you are still leaking on to the concrete floor. If you have a big puddle you will need to pressurize your cooling system as Hobe said, to see where your leak is. E-Mail me and I will send you pictures of the set-up I came up with. If it is a small puddle, re-torque (use a torque wrench)heads as mentioned above, then refill your coolant and see how much you are still leaking passed the heads on to the floor. If you have to replace the Head Gasket, see if you can find the ones that have the copper ring around the water jacket holes as well and the valve openings. I could not locate one, but the one I took of my tractor had them. Lets hope its just a re-torque thats needed or a Head Gasket. Both easy to accomplish.
Mark :)

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Rush-N

07-21-2006 05:56:45

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Re: Intake/Exhaust Manifold in reply to Rush-N, 07-20-2006 12:17:32

All it turned out to be was improperly torqued head bolts or head gasket. When I pressurized the cooling system following YOUR advice, and the oil pan off I could see no signs off coolant escaping anywhere, and thats at 25-30 psi. That was the good news, the bad new was that I went through all that work when it was something that easy. I guess I would do that all over again, instead of a cracked block.

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ron,ar

07-20-2006 16:27:15

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hey Mark in reply to Rush-N, 07-20-2006 12:17:32

Is that bracket between the dist and alt mount for plug wires? Is it original? I never saw one before, is there one on the other side also? That tractor is looking good, is it finished yet?

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Rush-N

07-21-2006 06:04:28

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Re: hey Mark in reply to ron,ar, 07-20-2006 16:27:15

Ron, I do not know if that bracket was original but you can get those anywhere-Part Number 9N-14564-$5.00. It keeps the #1 and #2 spark plug wire from the fan belt. And yes the tractor is 95% complete.

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Hobo,NC

07-20-2006 14:40:58

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Re: Intake/Exhaust Manifold in reply to Rush-N, 07-20-2006 12:17:32

What did you find to be the problem

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Gregg E

07-20-2006 09:41:27

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Re: Intake/Exhaust Manifold in reply to chucktn, 07-20-2006 06:36:10

Might try retorquing the head again.

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Ken in MI

07-20-2006 06:58:29

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Re: Intake/Exhaust Manifold in reply to chucktn, 07-20-2006 06:36:10

There are no water ports in the exhaust manifold. the ports are for exhaust and from the carb.

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d thomas

07-20-2006 07:53:27

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Re: Intake/Exhaust Manifold in reply to Ken in MI, 07-20-2006 06:58:29

Ya know, your right. I was thinking wrong. I had leaking from the studs that hold the manifold on because they tap into the water jackets and if they are loose or taken out then antifreeze will come out.

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Hobo,NC

07-20-2006 06:53:28

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Re: Intake/Exhaust Manifold in reply to chucktn, 07-20-2006 06:36:10

Remove plugs let set overnight look in plug hole for coolant then Spin engine over look for enny sing of coolant being sprayed out plug hole. If none place thumb over each spark plug hole spin engine over and when compression pops thumb off check for sings of coolant. Also add�in pressure to the radiator will help. If I saw no sings of coolant maybe then I would drop the pan fer a look. If you pull the head then all you kin do izz a visual test with yer eyes so it would be nice to elimate the leak down to the cylinder its leak�in in. You also could remove the exhaust manifold and look into the valve ports to elimate the cylinder that may be leak�in. most of the time if it�s a cracked head or gaskets over time it will leak out the throat of the carb after it sets for awhile so remove the air cleaner pipe at the carb. I have also removed the head and left the block full of coolant to the point the coolant will not leak over in the cylinders to check for a leak out the bottom of the block. Gonna be a hard find if it�s the block and iffin you jump into remove�in the head before you determine the exact area of the leak it will be much harder.

cracked head

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d thomas

07-20-2006 06:47:19

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Re: Intake/Exhaust Manifold in reply to chucktn, 07-20-2006 06:36:10

Yes it would. There are also water ports that run through the manifold. So antifreeze could be comig out if the gasket is not sealing properly thus seeing antifreeze. Also the white smoke after start up is the leaking antifreeze burning off. For it to happen after sitting a few days is the only time you notice it then it is a very small leak as you stated by seeing the pin size amount of antifreeze. I'd say new gaskets-which are fairly inexpensive-should fix the problem -that is if the manifild is not pitted and in bad shape.

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