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D17 Radiator Cap
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Dave (NE) View Drop Down
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Joined: 12 Sep 2009
Location: Eagle Nebraska
Points: 2148 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave (NE) Quote  Post ReplyReply Direct Link To This Post Topic: D17 Radiator Cap
    Posted: 02 Nov 2024 at 9:12am
Was using the D17 IV diesel and loader a couple days ago and noticed the temp gauge was acting strange.  Not going up to normal, jumping into the red zone, then settling into the normal area. Then noticed some radiator fluid dripping out and some onto the engine.  Shut things down, looked things over a bit and removed the cap.  The round metal piece at the bottom of the cap was just hanging down.  Thought it should be pressed up tight against the base of the cap.  Does this indicate the cap is bad?  Could that have caused the problems I am having?  Thanks for the help.  Dave
Do not argue with an idiot. He will drag you down to his level and beat you with experience. Mark Twain.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 20520 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 02 Nov 2024 at 4:14pm
That is a spring loaded flapper that seals up so the cooling system can build 12 psi of pressure. When they go bad like that, no pressure can be built. Your description of the temp gauge is usually an indication of low on coolant and/or a blown head gasket or one that is ready to blow.
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Dave (NE) View Drop Down
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Points: 2148 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave (NE) Quote  Post ReplyReply Direct Link To This Post Posted: 02 Nov 2024 at 7:28pm
Wow, sounds serious.  I'll make sure the fluid level is not low, first, but I don't think it was.  Should I get a new cap also?  Thanks for the feedback.  Dave
Do not argue with an idiot. He will drag you down to his level and beat you with experience. Mark Twain.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 20520 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 02 Nov 2024 at 9:03pm
You can if you want but if the head gasket is bad that won;t fix it.
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Dave (NE) View Drop Down
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Points: 2148 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave (NE) Quote  Post ReplyReply Direct Link To This Post Posted: 02 Nov 2024 at 9:15pm
How do I confirm it is or is not the head gasket?
Do not argue with an idiot. He will drag you down to his level and beat you with experience. Mark Twain.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 20520 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 02 Nov 2024 at 10:39pm
Start by confirming what I think is going on......check the radiator and I'll bet it's a gallon low on coolant. If it is, refill it and continue to use the tractor, remembering to keep checking the coolant to see if it still goes down. Temp gauges act funny when coolant is LOW.
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