RAM 1500 Diesel Forum banner

1 - 7 of 7 Posts

·
Registered
Joined
·
25 Posts
Discussion Starter #1
Sharing for the record in case someone has a similar experience. Also welcome anyone with mechanical knowledge to share insight on this.

2015, 60k, EGR cooler replaced 4/22/20. GDE Tune from 7k -48k, lost in AEM update June 2019. Prior to the EGR cooler replacement, truck was slowly leaking coolant from an unknown location. As this story attests, the recall did not put an end to coolant system issues.

The engine overheated for the first time the other day. It was in the low 90's outside at an elevation of about 5000 ft. IDK if this has anything to do with it, other than the climate it's used to is temperate and sea level. Got the overheat message three different times when coolant temps were in the 240s. The third time, the oil temp warning went off also. We had stopped several times and added about 4.5 gal of coolant and water, waited til evening when the ambient temp went down, blasted the heater with windows down and drove slowly to get it 30 miles back to town. The liquid was being blown all over the engine cover and under the hood.

The service record states Cause: "Has seam leak on rear of bottle, over top of fan shroud. Found coolant leaking also from thermostat housing, result of thermostat sticking closed, resulting in overheat condition and cause of failure for degas bottle."

Correction: "removed and replaced both de-gas bottle and thermostat, vacuum filled cooling system, npf after repairs"

After repair, we drove 800 miles in 12 hrs and had no further problems.

Service Advisor said that this experience had nothing to do with the EGR cooler replacement or other recalls. Is this plausible? Finding 24 pages of posts related to 'coolant loss' suggests coolant system failures are a known issue. Any thoughts/advice would be welcomed. Thanks for reading.
 

·
Super Moderator
2015 Outdoorsman EcoD CC w/6.4' 4X4
Joined
·
4,582 Posts
There have been a few degas bottles reported being replaced due to leaking, some from the filler neck not sealing. If it's mechanical it can break.
 

·
Registered
Joined
·
25 Posts
Discussion Starter #5
Found another clue on service notes from the VB1 recall on 4/22/20: "completed recall replaced egr cooler and pressure tested cac system. after completing recall went to removed coolant bottle cap to fill coolant. cap was seized in coolant bottle. cap will need replaced." Replacement was not mentioned at time of service. Did this cause the problem? Truck was driven very little between time of VB1 recall and the overheat incident.
 

·
Super Moderator
2015 Outdoorsman EcoD CC w/6.4' 4X4
Joined
·
4,582 Posts
cap was seized in coolant bottle. cap will need replaced." Replacement was not mentioned at time of service. Did this cause the problem?
If memory serves me correctly, there have been a couple of reported caps sticking in and breaking off while being removed.
If there was a problem with the pressure cap then it very well could have been the issue. The cap needs to hold the air gap in the top of the bottle.
 

·
Registered
Joined
·
25 Posts
Discussion Starter #7
Update, it's been about a month since the truck was serviced after the overheat. We drove 800 miles home, and not much since. Somehow, the truck is still losing coolant. This is post EGR cooler replacement, and degas bottle and thermostat were replaced post-overheat. Made appointment to be diagnosed next week. These mystery coolant loss issues are quite a PITA.
 
1 - 7 of 7 Posts
Top