TOO MUCH pressure!
#1
Teching In
Thread Starter
Join Date: Jul 2008
Location: Hattiesburg, Ms
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
TOO MUCH pressure!
i bought a 99 ws6 about 2 months ago and when i first got it the coolant level sensor kept blowing out of the radiator.. so i replaced it and has been fine ever since.. but now the upper radiator hose keeps blowing off of the radiator.. i took the stock hose clamp off and put a worm clamp on it and it did it again.. so i doubled up two worm clamps side by side and it blew off again.. it did this 3 times within 25 miles.. so something is causing it to build up WAY TOO MUCH pressure in the cooling system.. the gauge never went over 210 and there is no signs of water in the oil.. but after running it 2 miles down the road and coming back to the house and killing the car, you cant even attempt to touch the heads they are so damn hot.. any help would be greatly appreciated..
Last edited by GTwannabe; 05-24-2010 at 03:35 PM.
#4
TECH Fanatic
Join Date: Jan 2007
Location: LITH, IL.
Posts: 1,029
Likes: 0
Received 0 Likes
on
0 Posts
I stand by my statement, unless you replaced the core or at least had it rodded out, I would bet there is a bunch of crud in the radiator, flushing it out doesn't work very well in my experience, just drives the blockage deeper in.
#6
Teching In
Thread Starter
Join Date: Jul 2008
Location: Hattiesburg, Ms
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
Trending Topics
#8
Teching In
Thread Starter
Join Date: Jul 2008
Location: Hattiesburg, Ms
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
this may be a stupid question.. but i took the hose off and barely any coolant came out, but when i took the thermostat housing off it POURED out.. is this a sign of it being stuck closed? or is this normal?
#11
How about the cap? Rent or buy a cooling system pressure test kit. Use the tool to see what is going on. Could be a head gasket, could be radiator, could be... XXX component and so on.
Start basic cooling system troubleshooting. Test the system under pressure. Toss the thermostat in boiling pot of water and watch see if it moves or not. Remember you can never have enough tools
You will fix it.
Start basic cooling system troubleshooting. Test the system under pressure. Toss the thermostat in boiling pot of water and watch see if it moves or not. Remember you can never have enough tools
You will fix it.
#12
Teching In
Thread Starter
Join Date: Jul 2008
Location: Hattiesburg, Ms
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
How about the cap? Rent or buy a cooling system pressure test kit. Use the tool to see what is going on. Could be a head gasket, could be radiator, could be... XXX component and so on.
Start basic cooling system troubleshooting. Test the system under pressure. Toss the thermostat in boiling pot of water and watch see if it moves or not. Remember you can never have enough tools
You will fix it.
Start basic cooling system troubleshooting. Test the system under pressure. Toss the thermostat in boiling pot of water and watch see if it moves or not. Remember you can never have enough tools
You will fix it.
#13
LS1Tech Administrator
iTrader: (3)
Join Date: Nov 2001
Location: Schiller Park, IL Member: #317
Posts: 32,362
Likes: 0
Received 1,794 Likes
on
1,278 Posts
This is where I would start.
If the cap is working properly, excess heat/pressure should cause coolant to blow out the overflow bottle, not blow hoses off the radiator.....unless there is a blockage in the radiator not allowing the extra pressure to push coolant into the overflow bottle.
Assuming you pulled the hose off when the motor was NOT at full running temp, then it would be normal for the t-stat to be closed at that point. Since you have it apart, might as well swap out the t-stat and see what happens. I would replace the cap too, just make sure you get the correct rating cap.
If the cap is working properly, excess heat/pressure should cause coolant to blow out the overflow bottle, not blow hoses off the radiator.....unless there is a blockage in the radiator not allowing the extra pressure to push coolant into the overflow bottle.
Originally Posted by GTwannabe
this may be a stupid question.. but i took the hose off and barely any coolant came out, but when i took the thermostat housing off it POURED out.. is this a sign of it being stuck closed? or is this normal?
#15
Teching In
Thread Starter
Join Date: Jul 2008
Location: Hattiesburg, Ms
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
this man right here.. you were right.. but a tester over the filler neck and cranked the car to check for exhaust gases.. the little blue dye turned yellow within 3 seconds.. definitely a blown head gasket or cracked head.. yay me! ftmfl!