why coolant sysem is under extreme pressure and leaks after thermostat replacement


Asked by Sep 07, 2015 at 10:41 PM about the 1999 Dodge Durango 4 Dr SLT 4WD SUV

Question type: General

replaced water pump and thermostat on Durango. Now it leaks coolant from everywhere especially the thermostat housing, truck sputters. and stops. A lot of pressure in lower coolant hose and none in the upper coolant hose

2 Answers


I think you need to start at the beginning again in the repair. 1 )Empty all the antifreeze from the car. Remove the thermostat and make sure it was installed in the correct position. I would just purchase a new at this point. 3) flush the entire system with a good system flush two times. Install all the parts and refill the system, MAKE SURTE YOU BLEED THE AIR OUT.


Check your spark plugs. A very clean plug or one covered with a white residue indicates a blown head gasket. A blown gasket will push compression into your cooling system and blow out your coolant.

Your Answer

Add photo

Related Questions

  • 2005 Dodge Durango 7 answers

    my truck is not in the mechanic shop it had a blown head gasket they replace them did a complete tune-up replace all Kohl's now the truck is still missing and I would like to know if you have any ...

    2005 Dodge Durango Adventurer



  • why is the millage on my 5.7 hemi going down 5 answers

    I have 109,000 miles on my durango and the millage is getting worse on a vehicle that already gets poor millage. I recently replaced the EGR valve and the plugs. any ideas?

    2006 Dodge Durango SLT



  • Hard Starting when cold 3 answers

    I have a 2001 Dodge Durango, 4.7 when first staring the vehicle for the day it takes a lot of cranking but it fires up and runs Great, once the Truck is shut down for a length of time same issue, thou...

    2001 Dodge Durango



  • 2000 Dodge Durango 5.9L 2 answers

    Vehicle has about 3/4 tank of gas. If fuel gauge shows empty vehicle will not start only cranks over. When the fuel gauge show it does have fuel it will start and run for about 10-15 min then die, so...

    2000 Dodge Durango SLT



  • Big Coolant Leak. 6 answers

    I have an 2005 Dodge Durango SLT. There is Coolant Fluid everywhere but I am not sure where to check for leaks at. Help please.

    2005 Dodge Durango SLT 4WD


    Maintenance & Repair

Search Dodge Durango Questions

Dodge Durango Experts

#1 Sigurður Guðmundsson
Sigurður Guðmundsson
Reputation 2,300
#2 Breanskis
Reputation 1,320
#3 tenspeed
Reputation 690
View All

Related Models For Sale

Used Jeep Grand Cherokee"
1,208 Great Deals out of 73,899 listings starting at $1,593
Used Ford Explorer"
1,363 Great Deals out of 71,762 listings starting at $300
Used Chevrolet Tahoe"
1,073 Great Deals out of 36,092 listings starting at $1,700
Used Dodge Ram 1500"
521 Great Deals out of 13,734 listings starting at $995
Used Toyota 4Runner"
364 Great Deals out of 18,988 listings starting at $2,200
Used Ford Expedition"
576 Great Deals out of 21,648 listings starting at $2,111
Used GMC Yukon"
564 Great Deals out of 19,450 listings starting at $2,500
Used Ford F-150"
3,272 Great Deals out of 216,641 listings starting at $1,500

Used Cars For Sale

2017 Dodge Durango For Sale
9,347 listings starting at $22,480
2016 Dodge Durango For Sale
37 Great Deals out of 3,101 listings starting at $25,998
2015 Dodge Durango For Sale
89 Great Deals out of 2,009 listings starting at $22,900
2014 Dodge Durango For Sale
47 Great Deals out of 1,252 listings starting at $16,900
2013 Dodge Durango For Sale
94 Great Deals out of 1,673 listings starting at $12,000