jd 420c big problem

kevencyr · Post by **kevencyr** » Sat Jun 27, 2015 7:23 pm

notice my crawler starting to have blue smoke coming from muffler, then when and check my radiator, was all black(engine oil was in there). anybody know what going on. i'm thinking head gasket, not sure. thanks

mapaduke@yahoo.com · Post by **mapaduke@yahoo.com** » Tue Jun 30, 2015 5:28 pm

I would say head gasket would be my first guss. Second guess would be cracked head.
Check the oil ,if its white or creamy looking then it's definitely mixing

kevencyr · Post by **kevencyr** » Tue Jun 30, 2015 6:18 pm

my oil is black, only got oil in radiator

mapaduke@yahoo.com · Post by **mapaduke@yahoo.com** » Tue Jun 30, 2015 6:21 pm

What model crawler do you have?

kevencyr · Post by **kevencyr** » Wed Jul 01, 2015 4:50 am

1957 420

mapaduke@yahoo.com · Post by **mapaduke@yahoo.com** » Wed Jul 01, 2015 6:13 pm

Still thinking head gasket, do you have a service manual?

Tigerhaze · Post by **Tigerhaze** » Wed Jul 01, 2015 6:35 pm

Admittedly I don't know much about this particular engine, but you may have water in the engine oil and not know it because it settles to the bottom of the oil pan and the oil floats above it. Usually you would see the mixing on a dipstick when running but may not always be obvious. Have you opened the oil pan drain plug to see if water comes out of it?

kevencyr · Post by **kevencyr** » Wed Jul 01, 2015 6:40 pm

not yet, will do next week and yes I got a manual

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jd 420c big problem

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