Author Topic: 671 DD oil in coolant  (Read 1103 times)

Offline dtcerrato

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671 DD oil in coolant
« on: October 12, 2019, 12:59:03 PM »
Been finding a fair amount of oil in the coolant. At first I thought it was residue from the disintegrated blower slowly finding it's way to the surge tank as oil floats on water. When I drain coolant from bottom of radiator it looks to be pure water/antifreeze mix but in the surge tank - lots of oil. Before leaving Alaska I used oil only absorbent media & got lots of oil out of the surge tank, now I'm doing it again & still lots of oil only in the surge tank. We consumed two gals of oil in over 10,000 miles while coolant has been maintaining level. I'm thinking oil cooler may be leaking? We're going after pulling radiator, fan hub, front main seal & oil change so we're in the area anyway. Would sure like to find out why oil in coolant... Any ideas?
Dan & Sandy
PD4104-129 since 1979

Offline luvrbus

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Re: 671 DD oil in coolant
« Reply #1 on: October 12, 2019, 01:30:10 PM »
,oil cooler plates has a leak
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Offline Geoff

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Re: 671 DD oil in coolant
« Reply #2 on: October 12, 2019, 03:33:22 PM »
Ditto with Clifford.  Oil coolers are a pain to test.  They have to be completely flushed out once removed with a hot pressure washer then pressure tested.  If it's not the oil cooler it could be a crack in the engine somewhere.
Geoff
'82 RTS AZ

Offline blue_goose

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Re: 671 DD oil in coolant
« Reply #3 on: October 14, 2019, 05:44:34 AM »
There could also be coolant in the oil.  My son lost a engine because of that.
Jack

Offline Red Rider

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Re: 671 DD oil in coolant
« Reply #4 on: October 15, 2019, 03:37:13 PM »
So sorry to hear Dan,
You have one of the cleanest 04's I've ever seen.
Thanks again for all your help in Blythesville. Turned out the over heating I was experiencing came from a slipping fan belt.
Mike AKA; Red Rider 4106-1885

Offline dtcerrato

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Re: 671 DD oil in coolant
« Reply #5 on: October 15, 2019, 05:16:35 PM »
Jack no coolant in the oil. Mike glad it was only a loose belt although your other upgrades would help also. Sometimes we forget to check the simplest things first! The old girl of ours doesn't owe us a thing. Almost 11,000 miles later and she's burping for some maintenance - we owe it to her. Great seeing you in Blytheville. It was a blast...
Dan & Sandy
PD4104-129 since 1979

Offline sledhead

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Re: 671 DD oil in coolant
« Reply #6 on: October 16, 2019, 05:30:15 AM »
send a sample of your oil to a lab to see what is in there . I did a oil and a anti freeze sample this spring to get a base line  and it was only $ 58 for both . came back with a great report now less stress

dave
dave , karen
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Offline dtcerrato

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Re: 671 DD oil in coolant
« Reply #7 on: October 28, 2019, 06:31:03 AM »
Cleaned & tank tested the oil cooler as per da book. Applied 125 psi @ 180° F tank water temp. No leaks, it's going back in.
Dan & Sandy
PD4104-129 since 1979

Offline luvrbus

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Re: 671 DD oil in coolant
« Reply #8 on: October 28, 2019, 07:04:11 AM »
A leaking gasket on the cooler will cause the problem also
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Offline dtcerrato

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Re: 671 DD oil in coolant
« Reply #9 on: October 28, 2019, 09:13:52 AM »
luvrbus I too was thinking it might have been a leaking gasket but when I look at the cooler exploded view I am trying to understand how oil can move toward water even with both oil & water side of the core plate gaskets leaking - it would appear to me that any gasket leakage on the oil side or the water side of the core plate wouldn't mix oil & water. I'm sorry if I sound like a non-believer but I need to understand how? What am I missing here? Thanks - maybe at a plate (8.4370) bolt hole(s)?
Dan & Sandy
PD4104-129 since 1979

Offline dtcerrato

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Re: 671 DD oil in coolant
« Reply #10 on: October 28, 2019, 09:20:21 AM »
Should I use some gasket compound with the new gasket install?
Dan & Sandy
PD4104-129 since 1979

Offline Utahclaimjumper

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Re: 671 DD oil in coolant
« Reply #11 on: October 29, 2019, 01:21:08 AM »
 Copper Kote.>>>Dan  ( Mix well before application )
Utclmjmpr 
 EX 4106 (presently SOB)
Cedar City, Ut.
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Offline luvrbus

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Re: 671 DD oil in coolant
« Reply #12 on: October 29, 2019, 07:05:25 AM »
Detroit calls out for # 5 Aviation Permatex ,when you did the inframe did you check the liner height on each cylinder ? 
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Offline dtcerrato

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Re: 671 DD oil in coolant
« Reply #13 on: October 29, 2019, 08:22:05 AM »
10-4 on the #5 Aviation Permatex. Yes we did check liner height during the in-frame. Don't remember the numbers but do remember checking it & reading da book.  Thanks!
Dan & Sandy
PD4104-129 since 1979

Offline luvrbus

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Re: 671 DD oil in coolant
« Reply #14 on: October 29, 2019, 08:24:35 AM »
Do you have a gray tint in the coolant ? with the oil
Life is short drink the good wine first

Offline dtcerrato

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Re: 671 DD oil in coolant
« Reply #15 on: October 29, 2019, 09:19:20 AM »
No
Dan & Sandy
PD4104-129 since 1979

Offline luvrbus

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Re: 671 DD oil in coolant
« Reply #16 on: October 29, 2019, 09:47:10 AM »
I would put it back together with new gaskets and use dishwasher soap with tap water (the stuff in the green box) clean the system good do not use Dawn it foams and watch it for awhile, a bad gasket could have been the problem if the full face gasket was bad that mates up to the filter base housing 
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Offline dtcerrato

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Re: 671 DD oil in coolant
« Reply #17 on: October 29, 2019, 04:21:38 PM »
Thanks for the feedback!   :)
Dan & Sandy
PD4104-129 since 1979

Offline dtcerrato

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Re: 671 DD oil in coolant
« Reply #18 on: November 04, 2019, 12:29:59 PM »
I bought Permatex Aviation gasket compound #3, couldn't find #5...
Dan & Sandy
PD4104-129 since 1979

Offline dtcerrato

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Re: 671 DD oil in coolant
« Reply #19 on: November 26, 2019, 07:06:23 PM »
Ok after all the work looking for a possible area where oil may be leaking into the coolant - I'm recently suspecting the engine air compressor... Engine oil and engine coolant cross paths in the cylinder head of the air compressor. The BW TU-FLO 501 air compressor is passing oil really bad into the discharge muffler and also into the wet tank. Is it possible that the compressor can be leaking oil into the coolant?? I'm trying to beat this one to the ground. Any thoughts?
Dan & Sandy
PD4104-129 since 1979

Offline Utahclaimjumper

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Re: 671 DD oil in coolant
« Reply #20 on: November 27, 2019, 05:38:48 AM »

 The rings are wore out and need replacing anyway,, so no loss..>>>Dan
Utclmjmpr 
 EX 4106 (presently SOB)
Cedar City, Ut.
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Offline chessie4905

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Re: 671 DD oil in coolant
« Reply #21 on: November 27, 2019, 05:52:58 AM »
Check the ping tank. It has a drain. Any significant oil accumulation there points to compressor, unless it has been years since drained. If nothing comes out, make sure drain isnt plugged.Leave it drain over night. I would put a couple of hundred miles and recheck tank for amount of accumulation, then change comp . If necessary. That way you wont replace something that may be ok. Cliff or Luke will tell you which one you would need when replacing.
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Offline luvrbus

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Re: 671 DD oil in coolant
« Reply #22 on: November 27, 2019, 03:26:06 PM »
Coolant is just on the head of the compressor to help cool the discharged air,when the head cracks which is very rare you get coolant in the engine oil or excess pressure in the coolant ,when the head gasket blows they will fill with water and shear the drive or the key anything is possible but I never saw one that leaked oil in the coolant system
Life is short drink the good wine first

Offline dtcerrato

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Re: 671 DD oil in coolant
« Reply #23 on: November 28, 2019, 06:24:20 AM »
Thanks for the feed back.
Dan & Sandy
PD4104-129 since 1979