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Head Gasket Seeping.

L

L.Fure

Well-known Member
I had my 300RN out of the barn today. I noticed that it doesn't run as smooth as the 530. It sounds like it is a little weak on one cylinder. I checked the spark on all four cylinders and that was okay. I did notice that the head gasket was seeping a little. Which makes me think the head may be a little loose. Could I get by with just tightening the exposed nuts on the right side, or would I need to take the valve cover off and re-torque then all. My next move will be a compression test before I try anything else.
 
Always better to torque em all the same, in sequence. If you don't have access to a manual, start in the center and circle out.
 
Be sure on a re-torque, to loosen the bolt to be tightened first, a quarter turn or so, then bring it up to spec. The break away force needed to start the bolt turning is usually more than the final torque
 
Retorque them ALL, then verify/set the valve clearances as needed, as squashing the head gasket a bit will snug them up!
 
first step required is the compression check. if that engine has not had the head off recently then forget the retorque. retorquing is for newly overhauled engines. and if you have a cyl. with low compression the head has to come off anyhow.
 
thank you oldproudvet...I think at one time I knew about breaking loose then retorqueing. Thanks for bringing it up.I may have learned something new today. gobble
 
Just open the cover on the hood, and work through there. It covers everything from the radiator to the dash. If the gasket is weeping, you may as well figure on replacing it. If you replace the gasket, you would be further ahead to remove the whole hood.
Loren
 
(quoted from post at 15:25:42 02/09/18) Just open the cover on the hood, and work through there. It covers everything from the radiator to the dash. If the gasket is weeping, you may as well figure on replacing it. If you replace the gasket, you would be further ahead to remove the whole hood.
Loren
Click to expand...

I'm going to do more diagnostic work before I start pulling wrenches. I'll look to see if I'm getting any exhaust bubbles in the radiator. My nose will tell me if any exhaust gases are getting in there. Then I'll check the condition of each spark plug. Then check the compression in each cylinder. There could be a chance of a burned valve and the head gasket is just a coincidence. I've seen weepy head gaskets before, and the engine always ran good. Like I said in my first post the engine sounds like it has a weak cylinder even though there isn't any plugs mis-firing. But all that will have to wait. We had a snow storm blow through last night, so I have to deal with that first. Then my wife wants me to take her vehicle to get a tire fixed before she gets off work. As they say, there's no rest for the wicked, and the righteous don't need any.
 
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