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Machinery Forum 1975 855 cummins [ Expand ] [ View Follow Ups ] [ Post Followup ] [ Return to Forum ] Posted by Mark on December 04, 2004 at 12:07:03 from (64.42.207.202): I have a 1975 brockway truck with an 855 Cummins engine and I am getting coolant in the oil and oil in the coolant. This only happens once in a while this fall when hauling from the combine on the morning check I was down about an inch in the rad didn’t think much of it the day before was hot and was hauling down soft road with big load. The next evening after hauling all day while unloading I could smell antifreeze vapour was coming out the crank case vent the next morning I was low a gallon and half of coolant. I checked the oil and it was not up so I cracked the oil drain plug and about half a cup of lumpy grey oil came out where did the antifreeze go. Yes this engine is wore out and has lots of blow by and I want to over haul it but would like to find the leak before I send that much money on this old truck. Thanks hope you Cummins guys can help. Ps I have the pan off with 20 lbs. pressure in the block and no leak block heated to about 100F Follow Ups: Re: 1975 855 cummins Mark 05:11:00 12/08/04 (1) Re: Re: 1975 855 cummins JimKS 20:46:13 01/03/05 (0) Re: 1975 855 cummins oldoak 13:08:27 12/04/04 (3) Re: Re: 1975 855 cummins Mark 13:34:33 12/04/04 (2) Re: Re: Re: 1975 855 cummins Larry Read 22:04:20 03/12/05 (0) Re: Re: Re: 1975 855 cummins bjr23 13:59:07 12/06/04 (0) Post A Followup Name: E-Mail: Subject: Re: 1975 855 cummins Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.