loosing it over the cooling system

[97eclipsegstdsm]

I'm at my wits end with my 96 gs I replaced the headgasket and the head all new hoses new radiator cap changed the radiator (it was bad) new thermostat had the bleed screw fixed on the housing (broinlaw is a machinist) I've flushed the block and radiator and bled and rebled 10+ times and it still boils over and I"m getting frustrated, any ideas? fyi I know what I'm doing I'm a trained tech it's just I've tried everything out there and nothing is fixing it

 

[Dsmkauai]

Is the thermostat opening? Maybe the heater core is clogged messing up the flow. Could there be a small leak somewhere that you don't see and maybe that's really the problem. Have you pressure tested the coolant system yet? Water pump has a belt on it?

 

[spyderdrifter]

Wait until the engine is cooled off enough and remove your radiator cap. Start your car and let it run for 20-30 minutes WITHOUT the rad. cap on. This will burp your coolant system of any trapped air. I went through this a few months ago. Thought my aluminum radiator was the problem, but it just needed to be burped fully.

 

[killercolt]

You might be looking at a crack block or head gasket not sealing up. Make sure the radiator is not clog up with rust.

 

[jayson427]

If you're a tech why didn't you check/replace the water pump when the head was off? You are probably in need of a new one if you have gone through the list with everything else.

 

[97eclipsegstdsm]

everything has been replaced I know cause I replaced it myself including the water pump, and I bypassed the heater core when I first got the car cause it had a leak in it, I think I might just do the 2.4 edz swap I can get a motor for free

 

[bryanwheat]

Have you done a hydrocarbon test of the coolant system to check for combustion leaking into it. There is really not much left other than a clog, or pushing coolant from cylinder pressure thru the gasket.

 

[Archer Fabrications]

What sort of fluid mix are you using

 

[Dsmkauai]

If your a tech figure the problem out!! What is swapping another motor In going to do? If you can't figure out a simple coolant issue, I don't see how swapping an engine will make things easier.

 

[Archer Fabrications]

Unless you got a shop towel sucked up in there

 

[97eclipsegstdsm]

Its a brand new oem head gasket I put it on last week I use a 50/50 mix, after doing some testing tonight I think I might have a bad block but I have 150 across all cylinders with no leakdown. And as for the motor swap its an excuse to do it plus I have family thats a machinist that will make me all the brackets I need to make it a simple swap I can get the oil pan modded too

 

[dsmer1]

How about any exaust leaks before the o2 sensor? What about the coolant temp sensor?

 

[WES_393]

Is it overheating, or just boiling out of the overflow? I've seen tons of radiator caps that are bad right out of the box. I only use Murray safety-vent caps from Oreilly's.

 

[Purex2c]

I would check the coolant system for leaks.

[ame=http://www.youtube.com/watch?v=DgxbPHX-W_M&feature=player_detailpage]Engine coolant system and compression testing - YouTube[/ame]

 

[jayson427]

I just realized you live in Kingman which no machine shop knows how to actually work on a dsm. Tnt auto screwed up 3 times while building my motor. You need to list your car to a gs not gst. Since you did the head gasket you probably didn't put it on right or completely backwards. For a 420a having 150psi of compression is pretty low and yet again for being a tech you should know that. It should be 180-190 compression on a stock motor . So you need to recheck your work because if you knew what you were doing you wouldn't have this problem. Shit you could have the wrong head gasket who knows but it's not something simple I'm sure. Not being a dick either but just because you went to school doesn't mean you have experience to assess your car or you wouldn't be asking.

 

[Archer Fabrications]

He just said he was a trained tech trained by is dad maybe?

^this is the 420A section though, listed as gs or gst should know it'll be the Chrysler motor.
Lol.

 

[bryanwheat]

He just said he was a trained tech trained by is dad maybe?

^this is the 420A section though, listed as gs or gst should know it'll be the Chrysler motor.
Lol.

I learned from my dad, nothing wrong with that.

 

[dsmcurse]

If you remove the T-stat on purpose and then put it back together and fill it up with water and then hold the TB flapper open by hand so you rev the motor (about 3k should work) and the radiator cap is off, can you see water flowing very hard and fast? or does the coolant bearley push?

Maybe headgasket is wrong? Id remove T-stat and give a visual on how hard and fast water moves through the system.

As a mechanic by trade, i have seen blades come off of a water pump impellor befor. Dumb stupid VW waterpumps are made of plastic as a means of "anti-rust"... Yours is not plastic but id still do this test as a means of seeing how much water your water pump moves.

Good-luck

 

[Archer Fabrications]

I learned from my dad, nothing wrong with that.

Well..... There would be if your calling yourself a trained or "certified" tech. I know he didn't say certified.... But it insinuated. Lol

 

[bryanwheat]

Well..... There would be if your calling yourself a trained or "certified" tech. I know he didn't say certified.... But it insinuated. Lol

Certification means nothing, I know a few guys who went to school who didn't know their ass from their elbow after tech school, wyotech and uti were the schools attended.

 

[Archer Fabrications]

I digress...

 

[bryanwheat]

Its a brand new oem head gasket I put it on last week I use a 50/50 mix, after doing some testing tonight I think I might have a bad block but I have 150 across all cylinders with no leakdown. And as for the motor swap its an excuse to do it plus I have family thats a machinist that will make me all the brackets I need to make it a simple swap I can get the oil pan modded too

What makes you think you have a bad block? 150 is a little low, but with all of them being consistent I'd be willing to bet that your gauge reads low, or you didn't have the throttle open. There are only so many things here that can make this happen. If the block isn't actually cracked, and leaking cylinder pressure into the cooling system than there is nothing wrong with the block. There is nothing else thee in the block to hinder cooling. If the head gasket were installed wrong, or damaged than it will push coolant out thru tha cap into reservoir or leak the coolant into the engine. From what I have gathered the radiator isn't loosing coolant, it is just boiling the coolant. Is the fan running properly, is the cap holding pressure, is the ac condenser full of debris blocking flow to the radiator, is the radiator full of debris which might prevent airflow thru it?

 

[97eclipsegstdsm]

I have 2 eclipses a 97 gst and a 96 gs so the car listed on my info is correct and I know how to build a motor correctly by myself(not a shop) your trying to make it seem like I'm some kind of idiot and I"m not and yeah I"m a certified tech and I did learn from my dad before I went to school he was a certified master tech for 20 years and he was an instructor too and he's dead now so I would appreciate it if people wouldn't mention my dad. I know who did your motor it was there when I took my 4g63t in for machine work, my thing in posting here is to see if anyone else has had the same issue with there 420a not to get negative crap trying to insinuate I don't know what I'm doing. bryan when I first bought the car there was issues with the cooling system yes the fans work see the car had no thermostat in it and I had to replace the radiator and after the thermostat would warm up with the cap off it pushes the coolant out so I replaced the head gasket with an oem headgasket put on a ported and polished head and intake and it still pushes the coolant out, the h/g is not on wrong I checked to make sure everything lined up properly before I put the head on the h/g went straight from the package onto the motor so my thing is I'm just puzzled as to what's going on

 

[jayson427]

You still have barely explained your issue yeah its over heating but what? At idle, crusing, wot? Is it right away or after driving a while? What brand water pump did you use? Could of been bad out the box? If you have checked everything then I'm stumped also. And I don't mean to act like your an idiot but all the stuff you said doesn't add up for your car to not run cool. The best mix for the radiator is 70% water and 30% coolant it's been proven many times so maybe try that. Other then that maybe your block is cracked. Take a sample like Brian said.