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Harry Ferguson Tractors Discussion Forum
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Replaced TO-30 Head Gasket - Clueless about valve

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Rick Whitworth

10-24-2003 08:51:39




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Pulled head to replace gasket (water in oil and saw no evidence of cracked head), but during the process the valve adjusting screws moved and I am a novice on how to re-adjust and time the valves. When the book says set to .013 - .015", where do I take this measurement. Can someone provide a step-by-step procedure. PS. The engine was turned to clean cylinder with head off if this makes a difference. HELP!

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to

10-27-2003 17:32:37




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 Re: Replaced TO-30 Head Gasket - Clueless about v in reply to Rick Whitworth, 10-24-2003 08:51:39  
The valves don't give a tinkers damn whether the engine is running or not.!!! If the valve train is too hot to touch with your bare hand it is hot. Like I've said, you can adjust 4 valves at a time, if you want to. There is no atvantage to adjusting the valves while running, except the fact that the company you're buyiung feeler gages from will probably send you a Christmas card.



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ErnieD

10-25-2003 07:02:24




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 Re: Replaced TO-30 Head Gasket - Clueless about v in reply to Rick Whitworth, 10-24-2003 08:51:39  
Adjusting the valves is the last thing you do, after torqueing the head bolts. And i would recommend retorqueing the bolts after it was hot. I also recommend setting the valve lash (clearance) while the engine is running, per the procedure below.



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TO24424

10-24-2003 17:26:37




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 Re: Replaced TO-30 Head Gasket - Clueless about v in reply to Rick Whitworth, 10-24-2003 08:51:39  
To get a inital setting, you will put the "feeler gage between the valve stem and the rocker arm. A slight drag should be felt when the "heel" of the cam, or most closed position is present. This is usually at the loosest setting. You can actually set 4 valves at a time, but I wont confuse you with that. This is with the engine cold, and not running. This will definitley be a little loose, since the valves streach with heat it'll be OK. Have fun, good luck!!PS You have to turn the engine over on each valve to find he heel or flag.

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Jerry/MT

10-24-2003 13:39:29




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 Re: Replaced TO-30 Head Gasket - Clueless about v in reply to Rick Whitworth, 10-24-2003 08:51:39  
Rick, Turning the engine while the head was off doesn't make any differnce to adjusting the valves or the valve timing. You'd have to fool with the timing gears that drive the cam to screw that up. I adjust the valve hot while the engine is idling. You need to provide a fuel supply while you're doing this because your tank is laying on the shop floor or anyway is not in a position to do you much good. I use a clean pop bottle with fuel in it and a hose that I can attach to the carb fuel tube. Loosen the valve cover fasteners but don't take the cover off yet. Start the engine and let it warm up til the thermostat opens. Set the throttle to the lowest position you can and still have the engine running, otherwise the rockers will spash oi everywhere. Loosen the nut on the valve, place your screw driver in the adjusting bolt (yeah it's a little tricky with the rocker moving up and down, put a .015 feeler in between the adjusting bolt and the valve stem. Move the feeler ever so slight back and forth and adjust the clearance til you feel the slightest bit of drag on the feeler. then , holding the adjusting bolt in position, tighten locking nut. Recheck and keep doing it til you got it right. Same proceedure for all the valves. Remember it is better to be on the loose side that the tight side, especially for exhaust valves. Hope this helps

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Justin-PA

10-24-2003 20:34:11




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 Re: Re: Replaced TO-30 Head Gasket - Clueless abo in reply to Jerry/MT, 10-24-2003 13:39:29  
Wow! that's the first time I've heard of adjusting the valves while it's running! Usually I warm it up until it is nice and hot and then set them as fast as possible (before everything cools too much). If you've never done it before, you might want to practice a few times while it is cool.

I might just have to try that trick next time Jerry!



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