zero 1162 Report post Posted August 10, 2021 I'm currently doing a cooling system overhaul on my e46 330d with the m57n 204hp engine. So far I have new rad, expansion tank, fan, waterpump and thermostat, and I will be buying new hoses too. What else should I be replacing while Im in there? Quote Share this post Link to post Share on other sites
aja540i 1906 Report post Posted August 10, 2021 Does it have an egr system still in it? If so, there should be a thermostat that controls it which can give up, might be worth doing . Quote Share this post Link to post Share on other sites
zero 1162 Report post Posted August 11, 2021 @aja540i yes it does have the egr still. What is your opinion on deleting the egr? Quote Share this post Link to post Share on other sites
aja540i 1906 Report post Posted August 11, 2021 I've left mine in so far, BMW put it there for a reason and its not that hard to keep it working. Quote Share this post Link to post Share on other sites
zero 1162 Report post Posted August 11, 2021 Okay, I'll leave it in, and also replace the little thermostat on the egr cooler Quote Share this post Link to post Share on other sites
