I got the zzp S3 H/E and dual pass installed this weekend. Everything is hooked up using ZZP's option B kit. I don't think everything is running smoothly and need some educated opinions. Here's what is going on:

I only had T Fittings, so there is extra tubing at the moment; I plan on redoing this with some molded tubing later on, but it is hooked up exactly like the ZZP diagram/crate engine depot diagram.

I turn the car on, and the coolant level in the surge tank rises. It looks like air is coming from the 3/4” hose into the tank. The bleed line has coolant in it to about the same level as in the tank. I turn the car off, and the coolant goes back to where it was. Air can be seen bleeding through the bleed line. I did have to refill the tank (because it dropped below the original point) a few times, about half a gallon total. Things seem stable now – coolant rises and falls, but does not get lower than it was.

My trip to work is approx 20 miles. My IAT2 after letting the engine warm up were 120. (IAT at 80) IAT rose to 86 over the drive, IAT2 rose to 136. About 3 miles away from work, I mashed the throttle to get the IAT2 up to 150ish and then went back to cruising. IAT2 cooled to 146 but did not drop any lower.

Thoughts??

 

You have air trapped in the system.

 

or green gunk

 

 

In for results. Local car is having the same issue.

 

green gunk...not sure if serious??

any good ideas on how to bleed the system more?

 

https://www.cobaltss.net/forums/2-0l...h-iat2-253408/

 

run your car and then take the surge tank cap off. should help with burping it

 

To release the trapped air with the opt b. tank I have always found it useful to raise the tank up while the car is running. This will help release any air pockets, and get your cooling setup running properly.

 

X2 I had to raise my tank high in the air before the system would start to purge air. Hold it up for a minute then put it back down and it should now purge on it's own

 

Yep. Opt B can be tricky, but once you "jump start" the bleeding process, it works great!!

 

off topic here, but thanks for all the great posts staged07. I'm just scrolling through the LSJ section and finding amazing info from you. Thanks!!

 

No prob man. I'm here to help.

 

staged is our own little cobalt scientist

 

All I did was run the car a bit. open the surge tank, run the car again on a little drive, open the surge tank again. I still depressurize the system every few days or so just to make sure it is bleeding. I have a little trickle of coolant coming in the bleeder line

 

You can do it this way as well, but IMO it's much quicker and more efficient to just raise the tank up while the car idles. Either way works!

 

Thanks for all the info! I did raise the tank up while the car was running and then kept it there with the car off. It seemed like it bled more after shutting the car off...So, I ran it, shut it off, and ran it again for about 45 minutes.