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Coolant issues

trevstuh86

Active member
Joined
Mar 5, 2015
Messages
27
Location
Mansfield, Tx
So I'm having this problem with my coolant boiling in the overflow but my car temp gauge is staying in the middle. When I log the data using ecmlink my temps go from 180 then 200-223. The highest temp I seen was 226. I have done a compression test and have 160 across the board, replaced my head gasket twice and head l19 head botls are tq'd to 100 lbs, replaced the thermostat twice, changed from a 90 style water neck back to the coolant neck with the coolant temp sensor on top. When I burped the coolant system I notice the coolant isn't circulating, rather just rises. I just went from a 16g to hy35 turbo. My water pipe isn't wrapped, I am using a scircco radiator from amazon. I have searched countless of overheating threads on the form, galantvr4.org, dsmtalk and googled. I'm going to replace the water pump in the morning and if that doesn't work I will get my spare head resurfaced and redo the head gasket again.

I'm thinking it could be the radiator I'm using from amazon. My water pump is a gates water pump, current head gasket is a fel pro that I copper sprayed on both sides. At this point I'm lost and probably put the car back on jackstands.
 

gvr4ever

Well-known member
Joined
Aug 6, 2002
Messages
6,021
Location
central Indiana
Have you made sure you don’t have a heater exchanger blockage? Have you checked the thermostat? I once had one that opened late, but did eventually open.
 

gvr4ever

Well-known member
Joined
Aug 6, 2002
Messages
6,021
Location
central Indiana
Scratch the thermostat. Reading glasses are new to me, but it seems like a possible blockage. Not sure if if the radiator you chose would cause that or not. Did it have a flow rating? I’m far from a radiator expert, but I thought they either cooled enough or not. Never heard of a flow problem.
 

trevstuh86

Active member
Joined
Mar 5, 2015
Messages
27
Location
Mansfield, Tx
I have heat, I redid my heater hose as well. I just replaced my water pump, I did see coolant starting to flow re bled the system. After bleeding the system I took it down the street and running stream watched the temps climb from 186 to 216. Turned around pulled the car back into the garage waited for the car to cool down a little. Coolant was full in the overflow bottle. Opened up the radiator cap and upper hose was empty. I topped it off and left the cap open, temps was 190 and climbed to 216, I noticed a bunch of bubbles so I will be getting a spare head sent off the machine shop.
 

yubh8tn

Well-known member
Joined
Aug 21, 2019
Messages
143
Location
coeur d alene, idaho
Let us know how it goes after putting the new head on. I'm new to a lot of this so forgive me asking, but how will a new head help? Are you worried the head surface is messed up? How does that affect coolant flow if its not leaking?
 

trevstuh86

Active member
Joined
Mar 5, 2015
Messages
27
Location
Mansfield, Tx
I'm think the head is cracked. I not mixing coolant with oil but with the amount of bubbles I have in the coolant, it makes me think I have exhaust gases pushing through.
 

tyeler18

Well-known member
Joined
Jul 16, 2012
Messages
111
Location
Casa Grande, AZ
Coolant wont boil at 226 if your radiator cap is holding pressure. You either have a leak in the system or the cap isnt holding pressure. Also if the upper hose was empty when you drove it you don't have enough coolant and probably have an air bubble trapped, hence the small bubbles you're seeing. Bleed the system, replace the cap with a quality cap and make sure there's no leaks.
 

KiNgMaRtY

Well-known member
Joined
Apr 8, 2008
Messages
804
Location
Corona, CA
Is the thermostat an OEM unit? 70% water, 30% coolant mix?
 

diambo4life

Well-known member
Joined
Jul 7, 2013
Messages
261
Location
Edmond, OK. USA.
Here is what you need to do:

1. Is your engine oil contaminated with coolant? Remove your oil cap after getting the car to temperature and check for milkshake like residue on the bottom of the cap.
2. Are your fan(s) operating correctly? Is your cooling system holding pressure?
3. Is there any evidence through the tailpipe of coolant combustion? Visual or smell?
3. Perform a leakdown test. A compression test in this scenario is not very useful! If combustion gases are actually going into your cooling system, this will be evident using a correctly performed leakdown test. It will tell you how much and where! Note: For best conclusive results...ALL valves have to be 100% closed when you do this which may require the removal of your cams.
 

trevstuh86

Active member
Joined
Mar 5, 2015
Messages
27
Location
Mansfield, Tx
So an update. I have a bad head. I did a leak down test and air is escaping out from the number 4 cylinder. I have a spare head I'm sending off to the machine shop. Back to being jsb. I can't catch a break with 1209/2000 sigh...
 

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