High Delta ?
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Tuned
Joined: Jan 2005
Posts: 354
Likes: 16
High Delta ?
My truck is running pretty high Deltas. The highest I've seen is ECT 160 and EOT 210. Most of the time my ECT is below 150, which seems pretty low to me, but my Deltas are around 40-50 at all times. I fill my Degas to the lower mark, and it always seems to blow abt an inch lower thru the cap, but it will stay there. I also notice some bubbling in degas bottle when idling. No white residue on cap, just seems to blow out that one inch of bottle level, which takes abt. a quart of coolant to refill. Also when I let off the throttle quickly I hear a kinda rattle thru the turbo, but the turbo spools up nice, if I let off smoothly no rattle. Truck runs excellent, plenty of power, starts easy. Am I looking at a new cooler, anyone riding around with deltas this high? I did my own oil cooler set up, have a thread on here detailing it. I guess I can do another if need be. I wonder if anyone ever ran one of these with no oil cooler, always wondered why it needs one, plenty of big V8 out there, no cooler at all ?
Postmaster
Joined: Aug 2015
Posts: 3,910
Likes: 18
From: NW IA
Get a new tstat in there for starters. You are burning fuel needlessly as the engine is trying to warm up. You should be at a minimum 185.
6.0 is much happier and efficient running up over 185 and beyond.
You should not be seeing bubbling in the degas.
6.0 is much happier and efficient running up over 185 and beyond.
You should not be seeing bubbling in the degas.
Thread Starter
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Tuned
Joined: Jan 2005
Posts: 354
Likes: 16
You know I was just thinking this, this morning, that the ECT is not getting hot enough and a thermostat should even thinks up a little, and then see what my Deltas are. Best part about this, is I flushed my system last week, so would have been a good time to do the stat, now i gotta drain her down again ugh. OK I'll give it a shot. Any ideas on the fluttering sound when letting off throttle. And what causes bubbles in Degas, possibly purging air , since I just drained it ?
Laughing Gas
Joined: Jun 2011
Posts: 780
Likes: 5
From: Kentucky
Just drain about a gallon out to change thermostat.as far as the bubling goes,could be a bad egr cooler caused by bad oil cooler,could be head gaskets,I recently had bubbling temp spread was normal but the degas cap was venting and my heat wasn't working very well,so now I'm doing head gaskets.
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Tuned
Joined: Jan 2005
Posts: 354
Likes: 16
I picked up a thermostat at Carquest says 89/104 Celsius. Whats the proper temp to be running? 104 translates to 214 degrees ? Seems hot ?
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Fleet Mechanic
Joined: Jan 2012
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oe t-stat is 192 kind of late now but you might want to get a motorcraft t-stat people haven't had much luck with the part store ones people have been liking the mishimoto that is a 200 degree. At 214 your fan will be running and google says it's even hotter 104 c = 219.2 degrees
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Posting Guru
Joined: Apr 2015
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From: Yakistan, WA
Replace the thermostat with a FURD OEM, or a Mishi (which I don't recommend, but others seem to love).
I believe a flutter is from the turbo not having a waste gate.
I know I could really hear my turbo fluttering before cleaning it, made a "huffa, huffa" or "cuff, cuff" noise. I am going to soon find out if it helped.
Return it, get the OEM.
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
My truck is running pretty high Deltas. The highest I've seen is ECT 160 and EOT 210. Most of the time my ECT is below 150, which seems pretty low to me, but my Deltas are around 40-50 at all times. I fill my Degas to the lower mark, and it always seems to blow abt an inch lower thru the cap, but it will stay there. I also notice some bubbling in degas bottle when idling. No white residue on cap, just seems to blow out that one inch of bottle level, which takes abt. a quart of coolant to refill. Also when I let off the throttle quickly I hear a kinda rattle thru the turbo, but the turbo spools up nice, if I let off smoothly no rattle. Truck runs excellent, plenty of power, starts easy. Am I looking at a new cooler, anyone riding around with deltas this high? I did my own oil cooler set up, have a thread on here detailing it. I guess I can do another if need be. I wonder if anyone ever ran one of these with no oil cooler, always wondered why it needs one, plenty of big V8 out there, no cooler at all ?
Oil cooler is needed because of the high pressure the fuel injection system needs to see during acceleration. The HPOP makes pressure around 4,000 psi during high fuel demand. That makes a ton of heat in addition to the normal heating the oil sees.
Thread Starter
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Tuned
Joined: Jan 2005
Posts: 354
Likes: 16
Replace the thermostat with a FURD OEM, or a Mishi (which I don't recommend, but others seem to love).
Please tell us what noise it sounds like, a rattle to me is much more different than a flutter.
I believe a flutter is from the turbo not having a waste gate.
I know I could really hear my turbo fluttering before cleaning it, made a "huffa, huffa" or "cuff, cuff" noise. I am going to soon find out if it helped.
Return it, get the OEM.
Please tell us what noise it sounds like, a rattle to me is much more different than a flutter.
I believe a flutter is from the turbo not having a waste gate.
I know I could really hear my turbo fluttering before cleaning it, made a "huffa, huffa" or "cuff, cuff" noise. I am going to soon find out if it helped.
Return it, get the OEM.
Lead Driver
Joined: May 2014
Posts: 6,545
Likes: 13
From: Virginia Beach VA
the turbo relieves pressure thru the intake, called a turbo fart. Letting off quickly makes it relieve excess pressure.... mine does it and yours should to. If it didn't, that would indicate that the vanes are stuck... I make sure mine does it at least once a week... stab the throttle and then let off fast... no flutter or huffa, huffa... needs cleaning.
VGT turbos have no blow off valve, why they make that noise. Blow off valves do just a big hiss when relieving pressure, our VGT farts.
VGT turbos have no blow off valve, why they make that noise. Blow off valves do just a big hiss when relieving pressure, our VGT farts.
Posting Guru
Joined: Apr 2015
Posts: 1,817
Likes: 0
From: Yakistan, WA
the turbo relieves pressure thru the intake, called a turbo fart. Letting off quickly makes it relieve excess pressure.... mine does it and yours should to. If it didn't, that would indicate that the vanes are stuck... I make sure mine does it at least once a week... stab the throttle and then let off fast... no flutter or huffa, huffa... needs cleaning.
VGT turbos have no blow off valve, why they make that noise. Blow off valves do just a big hiss when relieving pressure, our VGT farts.
VGT turbos have no blow off valve, why they make that noise. Blow off valves do just a big hiss when relieving pressure, our VGT farts.
Yeah! What he said!
Don't listen to me
I had it all bassackwards. Well, except I had the waste gate info right.I can't believe my trucks a fart sniffer.
LMAO!!!!
Thread Starter
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Tuned
Joined: Jan 2005
Posts: 354
Likes: 16
OK installed the new thermostat running 186 ECT and 220 EOT pretty consistant give or take. 35 degree deltas ! I've seen it spike to 40 on long uphill pulls and its winter. My EGR is deleted so should be safe for a lil while. My cold soak shows the EOT to be act. 5 degrees higher than ECT. Guess I should start gathering parts to do my external oil cooler. Alreday have a E series oil cooler cover just gott weld in some fittings. Had very good luck with the system I put together and did 2 more on friends truck, 100,000 trouble free miles on one of the systems so far, just a little proof to those who say it cant be done for around $500 - $600 in parts reliably and need to buy the $3000 bulletproof system.