Denso 221-3426 Radiator: Top-notch 🔥 Cooling Performance for Efficient Engine Functionality Review

Item arrived slightly damaged but enough to work. I had to change one of the corners of the attachment. I didn't realize it until I installed the unit and didn't want to reinstall the old heatsink to get that one back. I just got it working and kept going. Otherwise it seems to fit and serves its purpose.

Bought to replace the original heatsink in my 2005 G35X, fits perfectly with no issues and good quality as expected from Denso products. NOTE. If you are installing this in a G35/350Z, take your radiator flush with your original radiator before pulling it out. This makes it easier to remove the original cooler. The same goes for installation: put the heatsink in first, then add the fans. This greatly simplifies the whole process, since space under the hood is very cramped.

after installing it on my 2006 g35 the car overheated after about 3 minutes. Coolant continues to flow out of the expansion tank, no success after complete venting and new radiator cap, same result. I have noticed that the coolant system does not hold pressure when the car is running. The problem is that the radiator filler neck has the wrong depth of about 1.5mm more than the original. As a result, the radiator cap cannot close and close all the way, and the coolant is pushed further and…