oil temp compared to coolant temp, why??
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
Wolfee, I have absolutely no problem with any of the points that you have brought up. Face it, we have a 1st generation, epa, smog governed motor with two basta** and estranged parents. Orphans have to live with the cards dealt to them. A lot come thru life turning out great and the certain percentage are doomed to failure.
Elder User
Joined: Mar 2004
Posts: 790
Likes: 1
From: Fort. Lauderdale FL,
I agree, Like I said I dont down our motor and never the truck its self. I think our trucks are miles ahead of the pack and yeah epa has alot to do with it. Im sure we could make a power house and reliable engine that would plume black smoke for days. In my personal opinon Ford and all the others for that matter could make "better" engine but lets face it they rely on so much money for parts and service that an engine that needs a 2500 repair ever 50-75k is a great money maker. They are whats concidered throw away engines. WHen it goes you through it out and get another. They cant tell me that they couldnt make our engines linered for better cooling and heat transfer as well as service able. Its less hooking and wiring up on the factory line when a "complete"engine comes down the line. If I have to pay someone to install remote coolers and pumps and coolant filters well we would have to pay.
Elder User
Joined: Nov 2009
Posts: 636
Likes: 0
From: Saskatoon
Dont get me wrong I love my 6.0 EXCEPT one thing. I dont think its a "real" diesel. Im not saying how come it doesnt pull my 30k trailer. Im not one of those guys. It is designed to do what it was designed for. But I am a diesel mechanic but not trained on this engine. I am a marine diesel tech and have done work with over the road truck and bus. Yes the engines I work on have problems also no engine is 100% trouble free however I have busses with 750k and they do have water pumps and maybe an injector as well. So dont shot to fast at me it just seems there is a decent amount of trucks with lets just say oil cooler problems and lets be honest how many people with 75K in the world dont have gauges and have no clue they need a cooler. To me in the "real truck or marine diesel" world oil coolers last longer than that. If over the road trucks with Acerts, Cat C9's or DD15's were blowing coolers at 75K or less we would have no frieght moving. Some real diesel's will have problems but most will jsut need valve adjustmest at 500K or so. Nothing like what we go through. Again I love me truck and I would rather push my Ford then drive a chevy but lets be honest a 5.9 is just a better built , designed, and tried engine. Its not all fords fault emissons play a big part trying to comply and all but whatever... Sorry to rant just gets me going when Im putting money into coolers and egrs and injectors with 108k on the truck and many have these problems with alot less.
These engine are designed to run on fuel with a higher cetene level than what we have, the fuel company's were supposed to make better fuel since 2004 I think?
But they say it costs to much and refuse to do it, I run cetene boost and performance improver in every tank, guess what 120000 miles no major problems, yes I have a egr delete(just did not want to risk it) But I monitor EOT ECT once a month and have not seen more than 15 degrees ever.
I am going to put a coolant filter on for curiosity sake and see what happens.
I am Also A certified Diesel and heavy equipment Caterpillar Mechanic and have worked on the largest mining trucks in the world 24 cylinder engine with 3600 hp and the trucks are able to haul 400ton. So I know engines and coolant systems I have studied almost every piece of literature that cat has on coolant system and the failures and problems.
Most important thing is CHANGING coolant according to specs for your coolant.
I run cat elc in my Truck (biased, Yellow blood,BLUE MUSCLE) And will changed it every two years.
Buy the way Ask the 6.7 Cummins guys how well there EGR systems work?
They have a lot of problems now too. We NO LONGER HAVE THE DAYS of the 7.3 & 5.9 but in a few years i think it will get there, we just have to be Patient
So until that day my 6.0 will rock my world and i will love it for better and worse.
Elder User
Joined: Nov 2009
Posts: 636
Likes: 0
From: Saskatoon
Here's the way I understand it. The EGR cooler is downstream in the cooling path from the oil cooler. When the oil cooler plugs up due to casting sand/coolant precipitates the EGR cooler starves for coolant and whatever coolant DOES make it to the EGR cooler flash boils and starts to melt the EGR cooler guts allowing coolant into the intake. When this happens, blown head gaskets are the likely result. The reason for HG problem (credit to someone on here, can't remember who) is that the liquid coolant will NOT compress in the cylinder and the only place for it to go is out the head gasket.
Elder User
Joined: Mar 2004
Posts: 790
Likes: 1
From: Fort. Lauderdale FL,
Couldnt agree more. I know the cummins guys have there problems as does chevy. I also would rather see a little C9 in my truck I am all for the yellow. I personally work Detroit MTU and we have 20V8000 (16L per cyl) making 9800hp. I personally dont see those as our facitlity will only handle up to a 20V4000(4L per cyl) Still though thats making in the 4500Hp range so not small tipping the scales at 30K dry. I personally would love to see the Cat in my truck. I think they are awsome. My experiance with them is limited as I have done a full rebuild on a C9 and C11 but it was in a training situation. I do though however love me truck and like my engine. It has been good reliable. It has only left me starded twice. :-)
Junior User
Joined: Jun 2010
Posts: 52
Likes: 0
You can call me stupid if you want 
, but I am giving my new 6.0, and my first diesel, an honest opportunity to make me happy. I AM IN LOVE WITH THIS BAD ASX TRUCK. I am willing to do all the reliability mods. I am willing to pay for a couple of major repairs (I think), but if this thing goes south on me and has a catastrofic failure, I AM GOING TO YANK THE ELECTRONICS, MAKE IT A BOAT ANCHOR, AND DROP IN A 460 CUBIC INCH GORILLA MOTOR AND A C-6 (lets see, where did I put that number for Advance Adapters?)!!!!!
, but I am giving my new 6.0, and my first diesel, an honest opportunity to make me happy. I AM IN LOVE WITH THIS BAD ASX TRUCK. I am willing to do all the reliability mods. I am willing to pay for a couple of major repairs (I think), but if this thing goes south on me and has a catastrofic failure, I AM GOING TO YANK THE ELECTRONICS, MAKE IT A BOAT ANCHOR, AND DROP IN A 460 CUBIC INCH GORILLA MOTOR AND A C-6 (lets see, where did I put that number for Advance Adapters?)!!!!!
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
You can call me stupid if you want , but I am giving my new 6.0, and my first diesel, an honest opportunity to make me happy. I AM IN LOVE WITH THIS BAD ASX TRUCK. I am willing to do all the reliability mods. I am willing to pay for a couple of major repairs (I think), but if this thing goes south on me and has a catastrofic failure, I AM GOING TO YANK THE ELECTRONICS, MAKE IT A BOAT ANCHOR, AND DROP IN A 460 CUBIC INCH GORILLA MOTOR AND A C-6 (lets see, where did I put that number for Advance Adapters?)!!!!!
, but I am giving my new 6.0, and my first diesel, an honest opportunity to make me happy. I AM IN LOVE WITH THIS BAD ASX TRUCK. I am willing to do all the reliability mods. I am willing to pay for a couple of major repairs (I think), but if this thing goes south on me and has a catastrofic failure, I AM GOING TO YANK THE ELECTRONICS, MAKE IT A BOAT ANCHOR, AND DROP IN A 460 CUBIC INCH GORILLA MOTOR AND A C-6 (lets see, where did I put that number for Advance Adapters?)!!!!!
Tuned
Joined: Sep 2004
Posts: 255
Likes: 6
From: San Mateo, CA
So is the 15* variance thing for any instance? Meaning if your ECT and EOT are off even for a few minutes over 15* does that mean problems are on the way? Or is it a problem if it's that far off constantly?
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Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
Not true. When cresting or climbing a steep grade under certain conditions you can see seperations higher than 15 degrees. The 15 degree rule comes into effect under normal conditions after the engine temp has had time to stabilize. When cresting a hill your ect will nose dive and it takes time for the eot to catch up. I have seen 20 to 25 dgree differentials on the down side of an 8 degree grade. You have to let the system stabilize.
Junior User
Joined: Jun 2010
Posts: 52
Likes: 0
Then it sounds to me that if you are running down the interstate at speed not towing anything, engine vitals fully heated up, you better be under 15* seperation, or you probably have a problem beginning to surface with the oil cooler. Would you agree?
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
That is true. In fact they should be within the 15 degree diff. when towing on level or normal surfaces.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
Which normally happens only after the system has stabilized.
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