Delta between coolant and engine oil temperature.
Thread Starter
|
Fleet Mechanic
Joined: Apr 2019
Posts: 1,736
Likes: 660
From: South AR
Delta between coolant and engine oil temperature.
What is the normal acceptable delta between the coolant in the engine oil temperature in these trucks? I know when my father-in-law 6.0 It has be less than 15°F. In my 7.3 it is dramatically different and I’m not sure if that’s a problem.
After about 10 minutes driving my oil was at 160f but my coolant was at 60f... read in FORScan lite. Both set in F..
After about 10 minutes driving my oil was at 160f but my coolant was at 60f... read in FORScan lite. Both set in F..
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,352
Likes: 5,946
From: Lake Hartwell, GA
Unless you have a ZF6 or a customer added coolant temperature sensor, you are NOT getting a good reading on the coolant temperature. The 4R100 trucks do NOT have the ability to read coolant temperature through the PID/PCM and via programs like TP or Forscan.
Does this help, if not please let us know where and how you are taking the coolant temperature reading and we can go from there.
Does this help, if not please let us know where and how you are taking the coolant temperature reading and we can go from there.
Cargo Master
Joined: Mar 2019
Posts: 2,907
Likes: 788
From: Kinnula,Finland
I have stepper motor coolant gauge,sender in thermostat housing.
Oil temp shows always cooler than coolant..
If coolant cools oil,then oil should be always warmer...?
This is in winter temps,no data during summer yet..
Oil temp shows always cooler than coolant..
If coolant cools oil,then oil should be always warmer...?
This is in winter temps,no data during summer yet..
Postmaster
Joined: Nov 2015
Posts: 4,807
Likes: 125
From: Colorado Springs
What is the normal acceptable delta between the coolant in the engine oil temperature in these trucks? I know when my father-in-law 6.0 It has be less than 15°F. In my 7.3 it is dramatically different and I’m not sure if that’s a problem.
After about 10 minutes driving my oil was at 160f but my coolant was at 60f... read in FORScan lite. Both set in F..
After about 10 minutes driving my oil was at 160f but my coolant was at 60f... read in FORScan lite. Both set in F..
I’ve read 20* difference between oil and coolant temps. I typically see that temperature range unless the ambient temperature is extreme. Do you have heat in the cab? If you’re seeing low coolant temps, I’d be looking at a open thermostat. Grab your IR thermometer and see what temperatures you’re actually seeing before and after thermostat housing. I have oil temp from PCM and Coolant temps from gauge in the filter housing.
Super Moderator
Joined: Dec 2011
Posts: 13,306
Likes: 6,080
Cargo Master
Joined: Aug 2003
Posts: 2,332
Likes: 442
From: Eastern Washington
It takes a while to warm up both 4.5 gallons of oil and 13? gallons of coolant. After 30+ miles I remember seeing 215 oil temp, and presumably 205-ish of coolant temp.
Trending Topics
Thread Starter
|
Fleet Mechanic
Joined: Apr 2019
Posts: 1,736
Likes: 660
From: South AR
I think sous nailed it as I was using the PCM on FORScan. It doesn’t read that value on our trucks.... I have no direct gauge.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Tuned
Joined: Jun 2007
Posts: 431
Likes: 66
I did this years ago since I was driving long distances and had road time to monitor my Edge engine monitor. Especially during the summer, after the engine is well up to temperature, I concluded that if you take the ambient temperature from the overhead display and multiply it by 2; this should be close to your tranny temperature; then add about 100 degrees and that should be close to the oil temperature. The coolant temperature should be lower than the oil so there is heat transfer from the oil/tranny fluids to the coolant.
I think I generated a formula to calculate this using my previous user name “lhud”.
This is not an exact method but after watching this over several years and many miles it held true to form.
I think I generated a formula to calculate this using my previous user name “lhud”.
This is not an exact method but after watching this over several years and many miles it held true to form.
Thread
Thread Starter
Forum
Replies
Last Post