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There's the burst tank and the new one. You can see the obvious colour difference. The cap receptacle on the Woolfer tank was ready to fail under pressure as well, as can be seen by the lifting ring.

I got the one without the sensor. $200 was a bit pricey, but I suppose the piece of mind is worth it.

So I got a message from Woolfer recently stating that in response to the rash of failures they have pressure tested over 300 of their coolant tanks and all have failed, forcing 'discussions with the manufacturer'. I got my new replacement tank from HPG and there were marked differences from the...

The guy i talked to at Woolfer claims their overflow tanks are US made surplus, so i'm not sure what's going on there considering the one I replaced in my truck was 30 years old. The fan system works fine and it runs at normal temps during normal use. Perhaps there's some partial blockage or...

So this is what happened (photo) with the new tank (literally only 3 weeks old) I installed. I was rolling in a local Santa Claus parade and about 2/3 the way through began overheating to the point where coolant was venting out the discharge hose. I've been in my share of parades with MV's...

Here's the culprit. The previous owner painted the tank black and the age cracking wasn't seen until i removed some of the paint to investigate the leak.

I removed the tank from my truck and judging from the amount of micro cracking all over it I would assume it's original. During removal one of the return nipples actually cracked off with a chunk of the tank itself. I'm shocked the thing lasted this long! One observation, as stated previously...

The tank i got from Woolfer is listed as being manf'd by OEM and is described as “NEW SURPLUS MILITARY OVERSTOCK”. Anybody would read that as being legit NOS, so if they're passing Chinese knock-offs as surplus NOS that's pretty shady. I hope that's not the case.

So i finally got my truck back up and running again and took it for a test run to get everything moving on her again. Of all the things to fail- the coolant overflow tank. Total what the heck moment when i lifted the hood and saw a 3-foot stream of coolant squirting all over the top of my...