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Oil in cooling system #4511099
09/08/17 06:44 PM
09/08/17 06:44 PM
Joined: Aug 2015
Posts: 27
Indiana
CaptainFreon Offline OP
CaptainFreon  Offline OP
Joined: Aug 2015
Posts: 27
Indiana
2003 E350 extended cargo service van. 5.4L 338k miles. Never lost a spark plug or timing chain. NAPA Synthetic oil. Trany fine, fluid great condition today. This has been the best work truck I've had, bought in new and took good care of it, maintenance and driving.
There is some black oily substance in cooling system expansion tank. A few days later before appointment it started to blow the relief, so tried a new expansion tank cap 16 psi like original, still blew once.
I've gotten some mixed messages. One said it was probably the intake manifold gasket. Then another guy from the same garage said it was the trany fluid due to radiator.... Does that make sense?
Two other garages noted the pressure blowing when I removed tank cap, one said he could smell combustion products from tank pressure. They said it was a head gasket. That seems to make more sense because cylinder pressure pushed into coolant. What do you think?
.... If that's the case, what should I do? Pay for a head gasket job or put in a rebuilt engine because of the high miles? What approx garage cost quote could I expect to see for both?
I would like to buy a used Econoline just like it, but they are not readily available local-ish. Ford ended that Econoline.
Thanks ahead of time.

Re: Oil in cooling system [Re: CaptainFreon] #4511102
09/08/17 06:53 PM
09/08/17 06:53 PM
Joined: Jun 2005
Posts: 11,319
Santa Barbara, CA
bdcardinal Offline
Happy Birthday bdcardinal  Offline
Joined: Jun 2005
Posts: 11,319
Santa Barbara, CA
Oil filter adapter gasket. Both coolant and oil pass through it.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: Oil in cooling system [Re: bdcardinal] #4511139
09/08/17 07:51 PM
09/08/17 07:51 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: bdcardinal
Oil filter adapter gasket. Both coolant and oil pass through it.


My first guess, as well.

Looks like this:



"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Oil in cooling system [Re: CaptainFreon] #4511143
09/08/17 07:56 PM
09/08/17 07:56 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: CaptainFreon

There is some black oily substance in cooling system expansion tank. A few days later before appointment it started to blow the relief, so tried a new expansion tank cap 16 psi like original, still blew once.


Please explain this more....


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Oil in cooling system [Re: Linctex] #4511154
09/08/17 08:24 PM
09/08/17 08:24 PM
Joined: Aug 2015
Posts: 27
Indiana
CaptainFreon Offline OP
CaptainFreon  Offline OP
Joined: Aug 2015
Posts: 27
Indiana
I've had a slow leaking radiator for some time, been adding. After the last oil change, I opened to add, and saw what appears to be motor oil. Stuck my finger in and got black oilish on finger from inside wall of coolant tank. Then the cap on tank started blowing a few times. coolant was not overfilled. I bought a new 16 psi relive tank cap, and it still blew coolant out, most likely because cooling system pressure exceeded 16 psi, I felt the new cap confirmed that.

Re: Oil in cooling system [Re: Linctex] #4511156
09/08/17 08:27 PM
09/08/17 08:27 PM
Joined: Aug 2015
Posts: 27
Indiana
CaptainFreon Offline OP
CaptainFreon  Offline OP
Joined: Aug 2015
Posts: 27
Indiana
I wonder if that oil changing guy did something to the Oil filter adapter as explained above. I did catch saboteurs in the past doing other things to make a repair needed

Re: Oil in cooling system [Re: CaptainFreon] #4511158
09/08/17 08:30 PM
09/08/17 08:30 PM
Joined: May 2012
Posts: 1,400
Georgia
AVB Offline
AVB  Offline
Joined: May 2012
Posts: 1,400
Georgia
That sounds like a blown head gasket, does it blow bubbles in the tank with the cap off? With that many miles I would stick a junkyard motor in it.

Re: Oil in cooling system [Re: AVB] #4511162
09/08/17 08:38 PM
09/08/17 08:38 PM
Joined: Aug 2015
Posts: 27
Indiana
CaptainFreon Offline OP
CaptainFreon  Offline OP
Joined: Aug 2015
Posts: 27
Indiana
Once I did feel what I thought was air bubbles going through the return hose into the top of the radiator. Good idea about a junk yard motor

Re: Oil in cooling system [Re: CaptainFreon] #4511163
09/08/17 08:39 PM
09/08/17 08:39 PM
Joined: Oct 2004
Posts: 7,967
Cincinnati, OH, USA
bullwinkle Online confused
bullwinkle  Online Confused
Joined: Oct 2004
Posts: 7,967
Cincinnati, OH, USA
Might be worth it to try a combustion leak tester, like this-
https://mobiledistributorsupply.com/2714...SABEgIs7vD_BwE#
At least, you'll know what you're dealing with. If the engine has never been severely overheated, my guess would be head gasket as well.


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: Oil in cooling system [Re: CaptainFreon] #4511175
09/08/17 09:00 PM
09/08/17 09:00 PM
Joined: Apr 2008
Posts: 12,854
Onondaga County
Miller88 Offline
Miller88  Offline
Joined: Apr 2008
Posts: 12,854
Onondaga County
On my 5.4 it was the oil cooler itself. The gasket was okay, even after swapping it to the new engine, but the oil cooler filter housing failed.


18 Forester 2.5I 6M
00 Jeep Cherokee
01 Ford F-350 XL 4x4 5M
Re: Oil in cooling system [Re: CaptainFreon] #4511275
09/09/17 02:28 AM
09/09/17 02:28 AM
Joined: Aug 2006
Posts: 9,801
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,801
Central Washington
Are you losing/using oil?
Coolant in the oil?


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: Oil in cooling system [Re: Colt45ws] #4511335
09/09/17 06:42 AM
09/09/17 06:42 AM
Joined: Aug 2015
Posts: 27
Indiana
CaptainFreon Offline OP
CaptainFreon  Offline OP
Joined: Aug 2015
Posts: 27
Indiana
... Used oil for long time. no coolant in oil.

Re: Oil in cooling system [Re: CaptainFreon] #4511353
09/09/17 07:26 AM
09/09/17 07:26 AM
Joined: Mar 2004
Posts: 20,748
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 20,748
Upstate NY
Change the oil filter adapter gasket. If that does not resolve it then a head gasket or even crack in block or head.

How is the body and frame? If everything else is ok, I would go for a reman engine if it's not the oil filter adapter gasket.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Oil in cooling system [Re: CaptainFreon] #4511404
09/09/17 08:59 AM
09/09/17 08:59 AM
Joined: Sep 2015
Posts: 3,861
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,861
Connecticut
A tranny fluid leak into a radiator trans cooler (side tank of radiator) shouldn't over-pressurize the degas bottle. This type of slow leak would first be found by seeing reddish brown oil droplets in the coolant degas bottle.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs

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