radiator overflow filling up quick...after agp turbo kit, ect. install

[GSTdOff]

Logue do you have the stock BOV? If you do and you have the Wastegate Solenoid Restrictor removed, your running at your boost limit.

 

[Logue]

yeah i have the stock bov, and i do have the wastegate soliniod removed so what psi is that?? i brought the car to the machine shop that put the engine together. They said it might be my radiator cap is bad and not letting antifreeze back into the system but its letting it out of the system. they where busy when i brought it so i'm gonna bring it back and they will do a test were they check for hydrocarbons in the radiator steam..

 

[Eclipse90GSX]

my overflow tank gets full on normal driving, and the coolant even drips out of the bottle... my car is not overheating, at least i think its not but my temp guage bounces up and down like crazy..even if i move the shifter....im guessing thats in the wire/sending unit...

so i guess im not keeping any pressure in the system?... anyone got any ideas on what to change?
btw: when i reset the car (turn off the igniton and turn it back on) needle goes to below half-way mark which is again normal... so i know for sure it is not overheating...AND the fan turns on by itself AND the thermostat works (it flows the coolant)

the coolant in the overflow bottle is not oily, its pure green so i doubt its my headgasket, but it could be....

i know it could be rad cap, thermostat, radiator (brand new radiator so its not it) or headgasket.... headgasket maybe, i need to check compression.

 

[psychlow]

Have you bled the system of air bubbles?

Mine pushed coolant for awhile before I bled it, because there was air getting trapped near the thermostat, and it wasn't opening.

Also, be wary of the reading on your temp gauge. If there's air in the system, you're not getting a good reading.

 

[timm98gst]

i had the same think happen in my truck - turned out to be the water pump - engine never overheated or anything - i could hear a gurgling sound when i drove though

 

[Defiant]

I suggest changing the thermostat and radiator cap for starters.

 

[Eclipse90GSX]

changed the radiator cap, and it can';t be the water pump becasue its brand new only 600 miles old...ill check anyway
i'll give you guys an update ... i think its just trapped air in the system...how can u bleed the coolant system of air?

 

[bigfoot]

I'm also waiting for someone to post how to purge the air properly. I thought the thermostat has a small hole that lets any air pass over time.

I'm having similar problems. I got a 16lb. Stant cap. Make sure the bottle is at the min. mark.

They sell hydrocarbon test kits that can tell if it's a leaky headgasket or crack. I tried to get one yesterday but the parts store I went to didn't know where to get one. It used to be in the Mr. Gasket catalouge. The guy said used car buyers use them.

I read in my searches that running too much anti-freeze will do this too? True? I thought the car took 2 gal of coolant so I poured in a gallon of anti-freeze but then it only took a couple of quarts of water to top it off so I'm running 70% anti-freeze. Does it expand more?

 

[Defiant]

Squeeze the bottom radiator hose. It'll force out any air that might be left in the block. However, so will warming the engine up once. There's no place for it to trap air.

 

[RSTwnnabe]

I am having a similar problem with my 98 GSX. My temp gauge will be at operating temp for a while, and if i speed up much more than 40 or 50 mph, it will creep up. Its not horrible, buit its running to hot to drive my car hard. when i let off, it will fall back down. I checked, its not a head gasket, its not a leak, last week i dumped 2 bottle of coolant in it, and im finally sustaining my coolant, but it still runs hot. is this just a bubble in the system>?

 

[96tsiaddict]

I have looked at the other questions about this and found nothing so here it is. I just bought a 96 tsi 2 months ago. It has started spewing out coolant out of the overflow tank after about 20 minutes of driving. It then overheats because it gets so low on coolant. It puffs out white smoke for about 10 minutes after starting but then stops. No coolant in oil or vice versa. I did a compression check and all are at 190 or close to it. I replaced the radiator cap and thermostat. I even drained a bunch of coolant and put in more antifreeze in case the mixture isn't right. I assumed head gasket but all cylinders compressions are great. Help please.

 

[DrHess]

BHG

Dr.Hess

 

[96tsiaddict]

I sure hope it's not that but I fear you are right. The overflow tank after warming up starts bubbling from the air coming into it but as soon as it starts to cool down it stops so I'm wondering if possibly the hole opens when it's hot and then it is closed when I do the compression check because it has cooled down to much. Any suggestions on what HG. I'm hoping to do some mods including a 16G and maybe the stroker kit so I don't have to worry about crank walk. What head gasket would hold the most boost. And any other ideas on this problem?

 

[ADrewzki]

Maybe you could swap a different thermostat in and test it. Could be your old one is, well, OLD and on the fritz.

 

[96tsiaddict]

Maybe you could swap a different thermostat in and test it. Could be your old one is, well, OLD and on the fritz.

I just replaced that thermostat with a new one. One other thing I forgot to mention. It had a small leak that I put some of that radiator stop leak stuff in and fixed a couple weeks ago. Is there a chance that's plugging something else important? or is it more likely the HG.

 

[ADrewzki]

Yeah, sorry. I see now that you did replace the thermostat. As far as I know, all the store bought stop leak products are liquid based so they're not going to be able to clump together big enough to block up anything. I don't think it's the head gasket because I fail to see how a blown hg could cause your coolant to overflow. You'd probably get oil in your coolant and that white smoke but the overflowing thing doesn't fit into the equation. Could it be possible that your new tstat is defective? I'm really at a loss as to why this is happening.

Edit: I just thought of something. Your tstat might be fine but maybe it's your water pump that's flaking out. How old is it?

 

[mitsutuner]

merry christmas, you have a blown head gasket my friend.
white smoke is steam--burning coolant that got by the gasket & into the combustio chamber.
cofirm with compression test.
Happy new year!

 

[96tsiaddict]

merry christmas, you have a blown head gasket my friend.
white smoke is steam--burning coolant that got by the gasket & into the combustio chamber.
cofirm with compression test.
Happy new year!

The car doesn't puff white smoke after I drive it and the compression test came up with 190 on all cylinders?

 

[96tsiaddict]

Yeah, sorry. I see now that you did replace the thermostat. As far as I know, all the store bought stop leak products are liquid based so they're not going to be able to clump together big enough to block up anything. I don't think it's the head gasket because I fail to see how a blown hg could cause your coolant to overflow. You'd probably get oil in your coolant and that white smoke but the overflowing thing doesn't fit into the equation. Could it be possible that your new tstat is defective? I'm really at a loss as to why this is happening.

Edit: I just thought of something. Your tstat might be fine but maybe it's your water pump that's flaking out. How old is it?

The car has 61,000 on it and I'm sure that's how old the water pump is. If it was failing wouldn't it be spitting coolant out or something?

 

[2.4 turbo Hyped]

A compression check may or may not show the problem. I would try a leakdown test, that would show up better.

 

[ADrewzki]

The car has 61,000 on it and I'm sure that's how old the water pump is. If it was failing wouldn't it be spitting coolant out or something?

It's a long shot but maybe the impeller isn't working.

 

[DSM007]

well one other thing to check....I know 90's came with an external oil cooler....91-94's came with an oil/coolant type of cooler that was sandwitched between the oil filter and the block....if the thing is over tightened it can crush the housing causing ya to use coolant,blow coolant out your coolant bottle,but.........can cause you to mix coolant with oil too.....dunno about if 2g's can have this problem but one other thing to look out for.

 

[rebuilt65]

Try changing the cap.(I know, but I was a victim once of a faulty cap)

1. Most cars steam out of the exhaust when first started and the catalytic converter hasn't heated up.
2. If the cap is bad, bubles will appear in the overflow tank when you first start up.
3. A bad cap will not hold pressure, allowing the coolant to flow into the overflow, and then eventually the car will overheat.
4. Are the fans working?Turn of the A/C, both should come on. If the passenger fan does not cycle on its own, and only with the a/c system, the radiator fan switch is bad.

These things are the cheapest and easiest to change/check

Good luck

 

[rebuilt65]

I sure hope it's not that but I fear you are right. The overflow tank after warming up starts bubbling from the air coming into it but as soon as it starts to cool down it stops so I'm wondering if possibly the hole opens when it's hot and then it is closed when I do the compression check because it has cooled down to much. Any suggestions on what HG. I'm hoping to do some mods including a 16G and maybe the stroker kit so I don't have to worry about crank walk. What head gasket would hold the most boost. And any other ideas on this problem?

That's the only thing that might make me believe that it is the head gasket.

 

[96tsiaddict]

Try changing the cap.(I know, but I was a victim once of a faulty cap)

1. Most cars steam out of the exhaust when first started and the catalytic converter hasn't heated up.
2. If the cap is bad, bubles will appear in the overflow tank when you first start up.
3. A bad cap will not hold pressure, allowing the coolant to flow into the overflow, and then eventually the car will overheat.
4. Are the fans working?Turn of the A/C, both should come on. If the passenger fan does not cycle on its own, and only with the a/c system, the radiator fan switch is bad.

These things are the cheapest and easiest to change/check

Good luck

Well, I already replaced the cap and the fans are working fine so I'm narrowing it down quickly to the HG. If the water pump wasn't working would the engine heat up normally and sit in the normal area until the coolant is low enough to overheat though? I would think it would overheat right away. What about a certain type of HG? anyother thought is I'm thinking about putting a 1g head on at the same time but would it be better to get mine ported or just do the 1g engine swap now?