overflow raiator bubbeling

[joshovn]

my 89 VN Calais keeps overheating changed waterpump, flushed raidaitor, tryed to change thermostat (diddent have one) and now the water in the overflo raidiator bubbels when cars only 1/4 hot and top raidiator hose is real hot while bottom is cool. can anyone help me!!!!!!

[Not_An_Abba_Fan]

There are a few possibilities. Did you put a thermostat back in? Could be a head gasket, blocked radiator, upside down or stuffed thermostat, buggered water pump. Hard to say without seeing the car, take it to a radiator place and get it checked.

[joshovn]

i went to change the thermostst and there wasent one there just an empty pipe if i has one in there whould it not overheat?

[Troyziee]

my car does tha same thing, jack **** on tha temp gauge, but once i park tha car give her a couple of mins n tha overflow bottle is bubblin awai!! i've had tha whole radiator service thing twice at a radiator joint, there stumped on wat it is aswell, n had compression test n its not tha head gasket! so ### noes

[Not_An_Abba_Fan]

The over flow bottle will bubble sometimes when the car is switched off. The coolant in the radiator heats up when it stops flowing so it builds up pressure, this pressure releases into the over flow. As it cools down, it gets sucked back into the radiator.

If the bottom hose is cool and the top one is hot with no thermostat, I'd be inclined to say there is a flow problem. Either the waterpump or a blocked radiator.

[joshovn]

i flushed the radioator with the garden hose a little bit of brown crap came out but than water ran clear with full pressure out the bottom could it still be blocked?

[joshovn]

thanks heaps dudes you've saved me $$$$

[joshovn]

when the bottel bubbles steam starts ****ing out of the little to hose

[Not_An_Abba_Fan]

Being blocked doesn't mean no flow, just reduced flow. You may have half of the radiator blocked. A garden hose doesn't really have the same pressure as the water pump at 2500rpm. Because the top and bottom hoses are different temperatures, you don't have proper flow. There is a restriction somewhere, 80% of the time it is a partially blocked radiator. The only real way to fix it is to take it out, remove the tanks and clean out the core.

Steam would be coming out of the little hose because the coolant in the bottle is hot.

[PaRaDoX]

The over flow bottle will bubble sometimes when the car is switched off. The coolant in the radiator heats up when it stops flowing so it builds up pressure, this pressure releases into the over flow. As it cools down, it gets sucked back into the radiator.

If the bottom hose is cool and the top one is hot with no thermostat, I'd be inclined to say there is a flow problem. Either the waterpump or a blocked radiator.

wrong wrong wrong wrong!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!

he has a vn series 1!!!! it still has the overflow but the water from the overflow drains directly into the inlet manifold, if the overflow tanks empty then its bad

ok your overflow tank is supposed to bubble, its a pressurised system...
if you open it after driving..or fail to seal it properly it WILL boil over and go everywhere... its like opening the radiator cap on a vn s2+

fill up the overflow tank all the way to the top with water
if you have air in the system from not enough coolant the air will super heat and cause the water in the system to boil meaning lots of steam and it will go bonkers with pressure and force its way out through a hose

you probbly have a slow leak somewhere,

a common place on those motors is the thermostat housing, was it going crazy before you tried to change the thermostat, after you park it look for water dripping down, the pressure will force its way and leak somewhere.. i bet your rear thermostat hose is saggy, mine was even a doubble clamp wont fix it, the parts $11 at autobahn anyway... just tighten up all the coolant hoses and no harm in running it without a thermostat it just means it will take longer to reach operating temp in the morning when its cold... no biggie just means it wont be as ecconomical on a cold start

[Troyziee]

ohhhh paradox, so could my whole problem be surrounding tha cap on the overflow bottle isnt air tight?

i neva get steam, just bubbles up and eventually all ****es out tha overlow tube!

[Joey_21]

didnt urs fix after u put the pod troy????

[Not_An_Abba_Fan]

wrong wrong wrong wrong!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!

he has a vn series 1!!!! it still has the overflow but the water from the overflow drains directly into the inlet manifold, if the overflow tanks empty then its bad

ok your overflow tank is supposed to bubble, its a pressurised system...
if you open it after driving..or fail to seal it properly it WILL boil over and go everywhere... its like opening the radiator cap on a vn s2+

fill up the overflow tank all the way to the top with water
if you have air in the system from not enough coolant the air will super heat and cause the water in the system to boil meaning lots of steam and it will go bonkers with pressure and force its way out through a hose

you probbly have a slow leak somewhere,

a common place on those motors is the thermostat housing, was it going crazy before you tried to change the thermostat, after you park it look for water dripping down, the pressure will force its way and leak somewhere.. i bet your rear thermostat hose is saggy, mine was even a doubble clamp wont fix it, the parts $11 at autobahn anyway... just tighten up all the coolant hoses and no harm in running it without a thermostat it just means it will take longer to reach operating temp in the morning when its cold... no biggie just means it wont be as ecconomical on a cold start

How do you know it's a series 1? The series 2 was released in September 1989. If it is a series 1, try changing the cap, if it was stuffed, it wouldn't take much pressure at all for the coolant and steam to come out of the hose.

[Troyziee]

ye eva since i installed tha pod it was all sweet, which was like 1.5yrs ago, but only jus recently its startin ****in itself on occasion

i've figured out tha when i put coolant in it will **** out, but if i just have water its all good, so its allergic to coolant lol

[Not_An_Abba_Fan]

The best coolant to use is water with a corrosion inhibitor. Doesn't get cold enough for anti-freeze and the inhibitor has agents in it that raises the boiling point too.

[aussieghostrider]

I have a series 1 vn and the bottle with the black cap can be awkard to seal back on ..

when you have flushed your radiator sticking the garden hose in all the hoses and radiator openings then you have put everything back on and you fill car up with coolant ... just fill it up a little bit and then start car up and continue to pour coolant into it but only say half the bottle then wait a few minutes for all the air to come out, turn the heater on as well. It might be also good idea to put a radiator flush through your system.

once you have let car warm up and all bubbles are gone then top it up little more so when you look into bottle the levels say 2 inches below where the cap goes on.

turn car off ... and get you cap which should also have a big rubber o ring which seats in the cap.Get some multipurpose grease and rub it all over the O ring then place inside the outer part of cap and gently put it on and turn slowly like your cracking a safe lol

this is how i do it and works 100% all the time.

these cars need like 50% coolant to 50% water ( use distilled water )

[aussieghostrider]

ye eva since i installed tha pod it was all sweet, which was like 1.5yrs ago, but only jus recently its startin ****in itself on occasion

i've figured out tha when i put coolant in it will **** out, but if i just have water its all good, so its allergic to coolant lol

sounds like your car likes to run hot ..

Id be changing coolant temp sensors if i were you...

[joshovn]

im going down now to take the thermostat out and just run without one. let you know how it goes

[joshovn]

### i took the throtle and ****e that was in the way out undid the 1 thermostat bolt but the #### wont ###in cum off anyone got any idears, hints, tips, trade secrets they whould like to share???????:BANG:

[aussieghostrider]

You gonna have to use some force on it to remove ... they get like welded on from all the heat.

if you search other threads on removing thermostat im sure you will get some ideas on how to do it.

[zapper]

### #### ###in :

interesting selection of words for a public forum

[joshovn]

interesting selection of words for a public forum

i got the thermostat out put it all back together (got pics) they to start it and it just clicks what have i knoked loose?

[joshovn]

all fixed !!!!!!!!!!!!!!!!!

[padrickz88]

ohhhh paradox, so could my whole problem be surrounding tha cap on the overflow bottle isnt air tight?

in short, yes it could be.... if you have a mate with a series 1, go get his cap and put it on yours... it could work..

thats what the problem was for my sisters car, we replaced ALOT of crap and in the end it turned out to be the top on the overflow bottle.. worth a shot