high coolant pressure with new DK heads
Thread Starter
|
Cargo Master
Joined: Oct 2018
Posts: 2,808
Likes: 1,895
From: unfortunately Germany
I did not put maximum load on the engine at that time. As mentioned above, it runs 5⁰ / 9⁰F ECT warmer than usual. I suspect that the fan clutch is not working properly.
The customer brought the truck to me because of white smoke and engine noise:
Of course, he couldn't have estimated that the repair would be so expensive (new heads, new turbo and many other small things).
That's why I couldn't repair it any further and didn't install a new fan clutch.
I have a lot of work to do here, but I will probably have to fix the truck at my own expense.
As soon as I have the truck here, I will drive it with a high boost and see how it reacts. But I think I already know the answer :-/
The customer brought the truck to me because of white smoke and engine noise:
Of course, he couldn't have estimated that the repair would be so expensive (new heads, new turbo and many other small things).
That's why I couldn't repair it any further and didn't install a new fan clutch.
I have a lot of work to do here, but I will probably have to fix the truck at my own expense.
As soon as I have the truck here, I will drive it with a high boost and see how it reacts. But I think I already know the answer :-/
Thread Starter
|
Cargo Master
Joined: Oct 2018
Posts: 2,808
Likes: 1,895
From: unfortunately Germany
filled system not with vacuum.
Thread Starter
|
Cargo Master
Joined: Oct 2018
Posts: 2,808
Likes: 1,895
From: unfortunately Germany
The coolant pressure is taken from the rear hose that goes to the intake manifold nipple. I have inserted a T-piece.
It probably doesn't matter which of the two hoses I put the T-piece in.
It probably doesn't matter which of the two hoses I put the T-piece in.
Hotshot
Joined: Dec 2014
Posts: 17,823
Likes: 3,101
From: Jersey Shore
Hartwig, it's been said that the intake hose has a higher pressure than the radiator hose, but I don't know if that is true or not. I have my additional head degas circuit tied into it, but at some point, I'm going to change it to the radiator hose instead. I have my coolant pressure transducer off the radiator hose.
Fleet Owner
Joined: Nov 2003
Posts: 27,871
Likes: 3,592
So Hartwig - earlier I was wondering about the hose that connects to the Intake Manifold (EGR coolant circuit) possibly being plugged (now I know it is not).
Now I wonder what would happen if you INTENTIONALLY blocked it off (clamp the hose closed). Can you check to see if the pressure behaves the same way with that hose clamped (install clamp on the intake manifold side of the hose tee)? Only clamp for a very short while.
And I do know that it will take a while for you to get back to the truck, lol!
Now I wonder what would happen if you INTENTIONALLY blocked it off (clamp the hose closed). Can you check to see if the pressure behaves the same way with that hose clamped (install clamp on the intake manifold side of the hose tee)? Only clamp for a very short while.
And I do know that it will take a while for you to get back to the truck, lol!
Thread Starter
|
Cargo Master
Joined: Oct 2018
Posts: 2,808
Likes: 1,895
From: unfortunately Germany
I do not have the truck here Mark. It is with the owner 300mls away from me.
The idea of you is good, I will check it as soon as the truck is here.
Here it is now 11.20pm.
Good night gentleman and thanks for your thoughts.
See you tomorrow.
The idea of you is good, I will check it as soon as the truck is here.
Here it is now 11.20pm.
Good night gentleman and thanks for your thoughts.
See you tomorrow.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Laughing Gas
Joined: Jul 2011
Posts: 836
Likes: 213
Hi Hartwig,
Sorry to hear about your troubles. I have been away for the last number of days aiding my aging parents get ready to move/downsize to a condo as my Dad now has severe dementia and just read thru this posting. This seems to be a real difficult issue to solve and I am just as curious as everyone else and would like to see what the solution is.
I see it far too often where companies offer/push products that are deemed to be high quality and then issues arise and they do not stand behind these products even if they did not directly manufacture these items. Service means everything and here they are missing a perfect opportunity to work with you even after acknowledging your superior workmanship.
I find it very hard to believe it is an injector cup issue. Is there a test to dismiss this possibility? This more appears that DK is "pushing the problem down the road".
Rob
Sorry to hear about your troubles. I have been away for the last number of days aiding my aging parents get ready to move/downsize to a condo as my Dad now has severe dementia and just read thru this posting. This seems to be a real difficult issue to solve and I am just as curious as everyone else and would like to see what the solution is.
I see it far too often where companies offer/push products that are deemed to be high quality and then issues arise and they do not stand behind these products even if they did not directly manufacture these items. Service means everything and here they are missing a perfect opportunity to work with you even after acknowledging your superior workmanship.
I find it very hard to believe it is an injector cup issue. Is there a test to dismiss this possibility? This more appears that DK is "pushing the problem down the road".
Rob
Thread Starter
|
Cargo Master
Joined: Oct 2018
Posts: 2,808
Likes: 1,895
From: unfortunately Germany
I filmed the coolant pressure behavior on my own 6.0 today. The truck has a camper body and weighs 6200Kg / 14000lbs. In normal conditions it has a coolant pressure of 9-11psi.
I drove up a long 12% grade with many tight serpentines. The coolant pressure increases proportionally with temps.
At 98°C /208°F EOT and 16.5psi coolant pressure, I switch the fan clutch to full load. Despite a constant load, ECT and EOT drop evenly.
If I continue the game, I have the same temps under load as on level road cruising.
I drove up a long 12% grade with many tight serpentines. The coolant pressure increases proportionally with temps.
At 98°C /208°F EOT and 16.5psi coolant pressure, I switch the fan clutch to full load. Despite a constant load, ECT and EOT drop evenly.
If I continue the game, I have the same temps under load as on level road cruising.