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Model C Coolant in Oil

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Les Kerf View Drop Down
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Joined: 08 May 2020
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Topic: Model C Coolant in Oil
    Posted: 20 Mar 2024 at 8:51pm
Went to fire it up after sitting in the shed all winter. Hoping it's just a welsh plug gone bad Cry Any suggestions as to where to look first?
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KMAG View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote KMAG Quote  Post ReplyReply Direct Link To This Post Posted: 20 Mar 2024 at 8:54pm
1st,pop valve cover and check freeze plugs in between valve springs.

Edited by KMAG - 20 Mar 2024 at 8:57pm
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steve(ill) View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 20 Mar 2024 at 8:58pm
If its the freeze plugs in the head, your "level" will drop 1-2 quarts and stop.... If its the o-rings on the piston liners, it will drain 3/4 of the block.  Freeze plugs are a good first start... Pull the drain plug and see how much antifreeze is in the oil..  You have to remove the oil pan to inspect drips from the liners.

Edited by steve(ill) - 20 Mar 2024 at 9:00pm
Like them all, but love the "B"s.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Eric B Quote  Post ReplyReply Direct Link To This Post Posted: 20 Mar 2024 at 9:19pm
Originally posted by KMAG KMAG wrote:

1st,pop valve cover and check freeze plugs in between valve springs.
That's exactly what I should have done first!! I dropped the pan first only to find out it came from the top. The pinhole was so small in the plug that it was nearly impossible to detect and of course they look perfect from the top in the presence of oil. The reason I dropped the pan first was that I had replaced one liner only a few weeks earlier and drew the conclusion that the liner didn't seal properly.
Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal!
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steve(ill) View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 20 Mar 2024 at 9:32pm
looks something like this........


Like them all, but love the "B"s.
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Les Kerf View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 21 Mar 2024 at 9:41am
Originally posted by steve(ill) steve(ill) wrote:

If its the freeze plugs in the head, your "level" will drop 1-2 quarts and stop.... If its the o-rings on the piston liners, it will drain 3/4 of the block.  Freeze plugs are a good first start... Pull the drain plug and see how much antifreeze is in the oil..  You have to remove the oil pan to inspect drips from the liners.


That gives me some hope; there was less than a quart of coolant in the pan.

Thanks to all for the advise, I have a few things to attend to before I can get to it but will definitely report back when I do.
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