COOLANT NOT FLOWING AND BUILDS UP PRESSURE.

  • Tiny
  • iowan86
  • 1995 Dodge Neon
  • 182,000 miles

I just put a new head gasket on this car, (95' dodge neon 2.0L SOHC) I had the head pressure checked and resurfaced. I also bought a head gasket set, so new head bolts and everything. I torqued the head down in the 4 stage process and everything. Well now it seems to have the same problem, the coolant isn't flowing, and it dont let me just dump in water to fill up the system, I can only add a little bit, then have to start the car, let it run a minute, shut it back off and then add more water to it.


Also it is leaking oil now from whats to look like the back side of the valve cover gasket, I used the torque specs but if by chance I got them over tightened on the vavle cover could this cause it to leak oil?

Thank you for your help!
Jonahton

Saturday, May 19th, 2012 AT 7:45 PM

13 Answers

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,550 posts

Did you replace the thermostat and water pump>>

overtightening could do it but I doubt it. The fagsket amy have slipped. Remove the cover and re check

Roy

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Saturday, May 19th, 2012 AT 8:00 PM
  • Tiny
  • iowan86
  • Member

Yes I replaced the water pump, timing belt, and a new thermastat.

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Saturday, May 19th, 2012 AT 8:02 PM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,550 posts

The iar needs to be pruged from the system. If the thermostat is on top of the motor, remove the housing and the thermostat. Add coolant until the coolant comes out the hole for the thermostat. Then re install the thermostat. Then the only air is a littl above that level.

Roy

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Saturday, May 19th, 2012 AT 8:05 PM
  • Tiny
  • iowan86
  • Member

I purged the air from the lines and still have the same issue. Pressure building up. Is there anything else that could cause this issue?

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Tuesday, May 22nd, 2012 AT 11:36 PM
  • Tiny
  • cadieman
  • Member

Remove the top hose at the rad. Keep the hose on and in the filler neck. When the stat. Opens water will flow out the upper hose when stat. Opens and the hose is refilling the radiator. Let it run through 5 stat. Open and closing. This will be what u call flow.

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Wednesday, May 23rd, 2012 AT 1:20 AM
  • Tiny
  • iowan86
  • Member

I took out the thermastat all together and drove it and it is still building up alot of pressure up in the cooling system really fast.

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Wednesday, May 23rd, 2012 AT 9:45 PM
  • Tiny
  • cadieman
  • Member

Ck] for flow by doing what I said. No stat the water should run constantly out the upper hose

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Wednesday, May 23rd, 2012 AT 10:01 PM
  • Tiny
  • iowan86
  • Member

Ok thermastat out, turn on car. Disconnect the upper radiator hose from the radiator and a little water came out. After running about another 10 seconds more water flowed out only for a few seconds. Maybe a quart of water total. After that nothing more came out. Too me it seems like something is blocking the water way or something but I flushed the coolant system and it all came out with no problems. Please point me in the right direction. Thank you for any help.

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Friday, May 25th, 2012 AT 1:04 AM
  • Tiny
  • cadieman
  • Member

Make sure u have the proper stat. Then put the stat back in. Check in a pot of water on the stove. That it opens. Reinstall it and remove the top hose at the rad.U should see it opening and closing. This is flow. Sorry its so long been sick.

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Friday, May 25th, 2012 AT 2:59 PM
  • Tiny
  • iowan86
  • Member

The flow seems to be flowing, but when I drive it, its still getting hot after I drive it about 20 miles, and seems like its building up a lot of pressure in the cooling system, making it bubble water out of the overflow tank.

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Sunday, May 27th, 2012 AT 4:05 PM

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