ACDelco 10368831 GM Original Equipment Radiator Surge Tank

I was getting intermittent COOLANT errors on my dashboard, meaning that the coolant level in the surge tank was low or the gauge was not working. Since the surge tank was full, it was the gauge. I was also having trouble with P0128 errors, which usually indicate a bad thermostat, with my temperature gauge reading zero. These were separate problems. The COOLANT error has nothing to do with the engine computer, sets no error codes, and doesn't make your car fail the emissions testing. It is simply an annoyance. I could have solved the COOLANT error by simply jumping the wires going to the surge tank, but why be practical. Besides, the new surge tank is a nice, clean white. Very attractive.The installation is a nuisance since you have to loosen the bracket that holds the fuse box and the ECM. I could find no clear instructions, and my Haynes manual spread this job over three chapters. A nightmare.But, it was easy in the end. Removing the ECM is simple in the 2007 model. It just pulls out. Don't need to remove the wires or the frame attached to the bracket. Take the top off the fuse box (but not the inner cover. Don't touch that or the three silver bolts which hold it on. Those are your fuse box grounding screws!), and then there are three bolts holding the bracket on.The sensor is a magnetic type. Mind still worked (easy to check with an ohm meter), but the plastic/metal ring was, I think, sticking, causing intermittent errors. It looks like bathtub type scum was making it stick. See the attached picture. That's after I cleaned it out with simple green. You might be able to clean it out with some sort of scum remover and save yourself some money. Since you will not make the mistake of putting the surge tank under the mounting bracket, it would be no big job to wash it out and reinstall it.About the thermostat. They all fail, and may fail gradually, and you wind up with a cold car or a P0128 error. The car may never get into its proper temperature range. That's bad. The thermostat is hard to get to and I found it impossible to remove the radiator hose off the thermostat housing because the clamp on the thermostat housing was positioned to make its removal impossible for me. With the ECM out of the way, and the surge hose detached from the surge tank, you can remove the thermostat housing easily even with the radiator hose attached to it. The thermostat just drops right in. Easy job. The only work is to drain the coolant. That can be done in several ways. (Radiator drain, remove radiator hose, drain it right from the thermostat housing as you remove it, or the water pump drain plug, which is what I did since that was the way recommended by the Haynes manual. They all can be a bit messy. I would reinstall the water pump drain plug with pipe joint compound since it is a threaded connection and has a very low torque.=========Update on the Surge Tank Gauge Problem===========After more investigation, I found that the green float on the gauge is only slightly less dense than than Dexcool antifreeze. The top of the float is almost even with the level of the antifreeze, that is, there is not a lot of excess buoyancy in this system. The float actually sinks in water. The weight of the float, combined with the weight of the scum on the float, and the reduction in specific gravity of the antifreeze with increased temperatures, I think allowed the float to sink and turn on the error message on the dashboard. If you go over some big bumps, the float likely will bottom out just due to mechanical forces. The scum may have caused increased friction between the gauge and the float, causes the gauge to stick after it bottomed out. So, if you want to try to clean out this surge tank to fix the problem, you will need to find a way to get that scum cleaned out.

My coolant light on my 2004 Saturn Ion starting coming on and engine temps and coolant levels were fine. There is a float inside the coolant that goes bad sometimes. I bought this replacement tank cause it's a factory Delco part. Putting this on tried my patience big time. Have to take off 3 bolts and loosen a 4th one to be able to move stuff around to be able to get tank in position to remove. The hard part for me was taking the hose off bottom of tank. I never could do it. Could not move tank far enough to move clamp to get the hose off. I finally got the tank out by removing hose from other end (to engine). This wasn't that easy either as hose was almost fused on. Was about ready to cut it and finally got the hose broke loose to get it off, then pulled tank off with hose attached. Putting it back together was easier. In hindsight if I had this to do all over again I would have just bought the bottom tank to engine hose and cut the old one off. Would have saved me an awful lot of time. Well I got the job done and no more coolant light coming on.

I had to buy this to fix my coolant level sensor. But because of GM's "genius" design, I had to spend 5x what it would cost to replace only the sensor and replace the whole tank because they thought it's a good idea to GLUE the sensor into the tank.Oh, and the picture in the description is of the BOTTOM of the tank. Not the top that you see under the hood.

Installed on my 2006 Saturn Ion that was having coolant sensor issue popping up on the information panel on the dash. Pretty easy installation and fixed the sensor and coolant problem. Shipping took a long time but sometimes that is to be expected with car parts. Overall would recommend to someone with the same problem. Have had no performance issues with it for 6 months after installation.

It’s not the easiest to disassemble, but that is no fault of the tank itself. Reassembly was much easier.Don’t waste money on an alternative solution for the tank. Just get the OEM solution. Yes you spend a little more money, but given the hit/miss of the other product, the time it takes to swap one of these tanks, it’s absolutely worth the extra investment to do it right the first time. Removed the error code that commonly comes to those Saturn ion vehicles - “low coolant”. Fixed that right away. I have an 06 Saturn ion.

I purchased this to fix the coolant light like the original poster. It did exactly that. I was able to complete the work in about 30 minutes and the coolant light has not come back. I would definitely recommend this for those Saturn owners who want to fix the bad sensor inside of the reservoir tank.I removed the reservoir first and tried to clean it. It was much cleaner but did not successfully fix the sensor. I had to buy this tank and replace the old one to get rid of the coolant light.Would definitely recommend to other Saturn owners.I love amazon and even more with prime! Great product, great prices, excellent shipping = happy customer.

After various months of being annoyed by the coolant message on my dash I decided to fix it. After looking for the level sensor itself I was told there's no such thing you have to buy the whole tank. Searching through amazon I came across this coolant tank, and after having read the reviews I ordered it right away. Shipping was really fast and as soon as it arrived I got to work. This is the easiest thing I have changed on my car I did it in 20 min. If not less. Surely after installation the annoying coolant error went away and problem was resolved. If your having the same problem don't hesitate to order, it sure works.

The tank assembly was delivered in a timely manner and in good condition. It was a little bit harder to install than it first appeared, but thanks to a couple of pretty handy co-workers, it was installed and is working well. At the dealer, it would have cost 6-8 times the amount that I ended up spending.