I recently have come across a coolant leak on my 2003 e46 325i. It only leaks once it’s built pressure. After taking a look from underneath the coolant is quite literally everywhere. And the highest point of the leak is on the upper radiator hose. I replaced the hose, still the same issue, I...

Hey everyone, I own a 2002 330i that just hit 102k miles and I'm getting around to changing everything involving the cooling system just as preventative maintenance and I noticed this exposed wire running next to the oil filter housing and right above my thermostat housing. Does anyone know what...

Hi guys, i bought my e46 a few months ago and had no troubles at all, but recently its gotten very cold and i've noticed that the car only comes up to temp when its idling and drastically drops when i start driving and never comes back to temp until i stop driving. i also have no heat at all...

So I have a 2000 e46 215k. About a month ago, my thermostat popped and I had to replace it. Did it myself, no problems. Fast forward to last weekend. The radiator reservoir busted and I had to park it immediately. Fixed it the next morning. New radiator reservoir and sensor.. everything fixed...

Hello. I got a buddy who just bought a 2004 325i. He had some issues with the cooling system. Here's the deal: No leaks No air in the system No signs of blown head/head gasket He said he drove it for about 15 minutes and it got warm. I helped tow it home for him. I think the thermostat is...

It's weird. Im just going to spill what was done and things that appear wrong for me. Everything started with leaks and I figured maybe engine is overheating and has too much pressure in the cooling system. When engine is warm upper hose is stiff and hot, lower hose is cold. INPA readings are...

I just bought my 325i and when i plugged in my scan tool while driving I noticed that my engine was at 99C and my radiator was at 27C. I tried to bleed the system with some distilled water just to see if that was the issue but I don't believe that it is. The radiator stayed stone cold the...

Hi all, I’ve got a 2002 M3 but I’m posting in the general forum as the same thing could maybe happen with any model. So the issue. The car has been in storage for a couple of months but I needed it about a fortnight ago. All was good when I put it away and it started and drove fine when I got...

A few months ago I had a little scare with overheating. It turns out one of the coolant lines was loose and resulted in coolant leaking out. Everything was fixed but ever since then I've made a note to turn on my obc to the coolant temperature to keep a closer eye on it, which brings us to this...

Hi everyone, i have an e46 diesel, my car used to get up to temp and then cool once on the motorway. I self- diagnosed this as a faulty thermostat and had it replaced. The car now stays at temp once its on the motorway. However, i have noticed that when i stop accelarating or going down hills or...

First off, I have SCOURED Google and these forums for an answer, so sorry in advance if I missed it. Anyways, I have a 2000 323i and long story short, it overheated due to the idler pulley breaking, so now I'm replacing the expansion tank. When I went to pull out the old atf thermostat...

Long time without write in the forum but last week my e46 it almost overheat and I want to share my history, all was good until a few days back when I return to my home from work, two blocks before my house my car start to rise temperature by one grade by grade in a very slow way, I mean one...

Hi all! I own a 2005 330i with 193k+ miles. Bought it for my kid half a year ago. Still runs great. However, we've noticed a couple months back that the thermostat gauge is reading half way. We recently drove it on a 6 and another 8 hour trip and the engine did not overheat even in...

Hey everybody. So I have a 2000 323i automatic that just won't behave. A couple of days ago I was driving home and overheated. A surprise since last summer I replaced the expansion tank, radiator, and hoses. Got the car towed home refilled with coolant and she held everything without spilling a...

Hey everybody. So I have a 2000 323i automatic that just won't behave. A couple of days ago I was driving home and overheated. A surprise since last summer I replaced the expansion tank, radiator, and hoses. Got the car towed home refilled with coolant and she held everything without spilling a...

Hello. My engine dont get warm.. And because of this I want to change the thermostat! I need some help to fint the thermostat on my 316i 2004. Got a picture of the engine in another 316i that I want to take the thermostat from. Would be awsome if you could help me and maby paint a ring around...

Hey guys, I'm having a bit of a strange issue with my 2001 325xi. I first started getting this P0128 code that suggests that my thermostat might be stuck open. I looked it up on the forums and then found that i should probably replace the Thermostat, so I got myself an eBay thermostat (no...

First of all, I know there are many posts under " head gasket" but this is my first post and I still had to ask before spending big bucks. A little background,(and the biggest regret of my car ownership life) I had to drive my car after the expansion tank cracked, all the coolant was leaking...

I have a 2003 e46. 2 weeks ago my expansion tank got a crack and over heated. I replaced it with an OEM tank and OEM upper radiator hose. I then filled up the tank but little did I know since its my first bmw i had to remove the bleeder screw and turn on my heat then fill up. So my car started...