cooling system problem
- Thread starter krisP
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
TypeRx
Full Access Member
Sounds like you have a lot of air in there! You need to "burp" the system and get things moving again.
On another car I've kept the coolant overflow cap open while the car is running - that helps get the air out. Also, I have done coolant on the RS4 but most cars have a coolant bleed bolt that should help get air out
Sent from my iPhone using Tapatalk
On another car I've kept the coolant overflow cap open while the car is running - that helps get the air out. Also, I have done coolant on the RS4 but most cars have a coolant bleed bolt that should help get air out
Sent from my iPhone using Tapatalk
dude1116
Full Access Member
We have a bleed bolt in the block right by the upper hose....but it sounds like something is clogged... Can you feel coolant flowing through the upper and lower hoses? (careful...upper can be quite hot).
TypeRx
Full Access Member
LOL - oops, I thought I was on another forum. Yeah, the bleed is on the upper radiator hose (right side of engine).
Did the water pump go as well? What else could cause a "clog" like this?
Sent from my iPhone using Tapatalk
uss2defiant
Full Access Member
mopar t-stat?
eradicator006
Full Access Member
Drain the cooling system and then fill it back up through the bleed hole that is on the upper hose. Once it's full there fill the coolant bottle until full. Run engine with heat on full blast until the cooling fan kicks in. Top up coolant as needed.
I've had to drain/fill my cooling system several times last month and doing that method worked every time for me.
I've had to drain/fill my cooling system several times last month and doing that method worked every time for me.
i drained the first time by just removing the lower rad hose since i was changing the t stat anyway , the fluid in the reservoir never budged when i drained or turned the engin back on after everything was reassembled
uss2defiant
Full Access Member
i think you need to get it flushed.
sounds like something is clogging the system.
sounds like something is clogging the system.
also if the new water pump i put in was the culprit the upper rad hose wouldnt be hot correct ? the wp ( gates ) spun just fine and i installed it correctly , torqued in quarter turns to 20 ft/lb in a criss cross pattern and then up to 40 .
so tommorw heres the plan....this is to remind myself ha
- try burping the system again ( heat on, rad cap open, bleeder valve )
- swap old tstat back in and test new one
- swap old leaky wp back in
- flush radiator to test flow....even though idk why chanign tstat and wp would cause a plug all of the sudden
- give up and take to dealer
so tommorw heres the plan....this is to remind myself ha
- try burping the system again ( heat on, rad cap open, bleeder valve )
- swap old tstat back in and test new one
- swap old leaky wp back in
- flush radiator to test flow....even though idk why chanign tstat and wp would cause a plug all of the sudden
- give up and take to dealer
uss2defiant
Full Access Member
renegade 04
Full Access Member
Leave the water pump alone, I would just replace the thermostat.
I had trouble getting my cooling system primed when I did mine. I was filling through the radiator, which didn't get me anywhere. I ended up removing one end of the top hose and filling from there.
thanks prof. were you getting overheating until you got it? The reservior level doesnt seem to want to move when i start it up but i know i lost at least a gallon or 2 when i took everything apart. Other vehicles ive worked on just suck the coolant in the reservoir up the second i start it or at least when up to temp
uss2defiant
Full Access Member
that really leaves me to think something is clogged.
When I did mine, I could use either the bleed hole or with the overflow tank.
Unless that new WP was already broken out from the get go.
uss2defiant
Full Access Member
run it without a thermostat and see whether it overheats.
you'll still need a gasket on the lower rad hose housing for this.
If it does, then something is clogged or the WP is the issue, i'd say.
Better stock up on DI water for this.
you'll still need a gasket on the lower rad hose housing for this.
If it does, then something is clogged or the WP is the issue, i'd say.
Better stock up on DI water for this.
Yes. The temperature outside was in single digits F and I had no trouble getting the engine temp above the halfway point in no time. Fortunately I was just making a quick trip around the block and it didn't go too far past midway.
It would not slurp any coolant from the reservoir, leading me to think it was a vapor lock. The lower hose was compressing like it was under a vacuum. The more I think about it, I seem to recall dumping some coolant down the lower hose as well.
I think when the lower portion of the engine gets drained it has a hard time filling back up.
Last edited:
