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Old 05-15-2017, 11:15 AM   #401
Fox Fader
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Quote:
Originally Posted by Mango View Post
yeah. the one above is a completely built high horsepower super beast (I think 800+) with what looks like a racing tranny. i forget. he has a few high end builds and documents every step. But a nice reference pic to see behind the engine.
Only if I had the money and time to transplant that into my E46. Talk about sleeper!
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Old 05-16-2017, 02:14 AM   #402
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Originally Posted by veli510 View Post
it's most likely leaking at the firewall. there is two hoses for the heater core. you need to take out the cabin filter and the compartment where the cabin filter sits in. you should change those hoses soon or it will bust and car will overheat and you will or may damage the head gasket.

you don't want that to happen.
Thanks for your response & @jmo62.

That would make sense from where its dripping. I'll need to look into how to get the filter & housing out. If you have any tutorials then please do link me. Otherwise I'll let you know how I get on. Cheers guys!
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Old 05-16-2017, 01:03 PM   #403
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Originally Posted by AboveDaRim View Post
Thanks for your response & @jmo62.

That would make sense from where its dripping. I'll need to look into how to get the filter & housing out. If you have any tutorials then please do link me. Otherwise I'll let you know how I get on. Cheers guys!
The cabin filter is held in place with 4(?) T-30 torx screws. You'll have to move the wiring harness that's attached to it, there's just plastic clips that hold it.
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Old 05-22-2017, 09:00 PM   #404
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All the oil was contained to the lower part of the engine bay. The top half vfrom pump down was dry, after pulling inspection cover on the bottom all the high pressure hoses were a mess and mechaniC said good luck ,but the oil level was proper after driving 600 mi at 80 to 85 mph. Will figure bit out but little things first . CEL. APPRECIATE THE GOOD WRITEUPS. THANKS GUYS
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Old 05-22-2017, 09:06 PM   #405
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Originally Posted by BMW-North View Post
Your ignorance is astounding - Seriously bad advice - take this advice and you will be spending money needlessly and making matters worse.

Here's why:

The most common point of failure on the PS reservoir is the thin o ring on the cap. It fails and fluid leaks from the cap. The most common reason for failure of the ring is contaminants on the mating surface from removal and replacement by the owner.

TIP: The better techs wipe both mating surfaces with a clean rag before putting the cap back on.

The second most common reason for leaking at the reservoir is overfilling.

The filter that we refer to is not really a filter in the sense that it has deteriorating components - it is a wide metal mesh that can be washed out with a little cleaner once the reservoir is removed.

An o -ring should NOT be changed as preventative maintenance - neither should you be removing the PS reservoir to periodically rinse out the metal strainer - why? you are more likely to damage the power steering hose connections from frequent removal and replacement and then you will have leaks less visible that may lead to substantial costly damage such as steering rack failure

So in summary - frequent changing of this part is more likely to cause damage than replacing the o-ring when required.
Hi All,

Over the last 5 months I have replaced the Radiator then the Expansion Tank cracked on me a couple months later. I had about 2 months of no leaks and found 2 spots of fluid on the floor today. Stopped to check my Oil (which was OK) and I found this:


I am not yet having any cooling issues, I wouldn't have known if I didn't have to park the car on the street for another project.

I had to drive it tonight and still have not received any coolant lights or even seen more coolant leaking. It sure looks like it was the cap. I had drove it on the highway pretty fast for me last Thursday I have no idea when the leak started, I am the last out and 1st in so no one ever gets to see it unless I am paranoid and check.

I figured that I would check the coolant level in the AM and wipe down the cap. I don't know if I didn't bleed the system right and overfilled or if after 15 years and 140,000 miles the cap o-ring gave out. Don't remember hearing any popping sounds.

Again no over heating or noticeable steam. If I did overfill it did I hurt the cooling system or just toast the cap?

Thanks for all the great posts and information in this thread. I have referenced it many times before.

Steve

Edit: This morning I checked the coolant level, it was showing full but I noticed dried coolant around the inside of the top of the expansion tank opening and around the cap. I cleaned it up and put the cap back on. Guess I will have my guy pressure test it again for a busted head gasket and either way will get a new cap. Still no sign of fresh leaks I drove it a lot yesterday.

Last edited by Broncosteven; 05-23-2017 at 12:48 PM.
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Old 05-26-2017, 10:39 AM   #406
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Hunting a leak

Great thread I have looked/read through as much of the thread as I can. and need some help find a leak. 2002 325Ci that has been leaking pretty good into the under-pan for about 3 months. I de-greased and cleaned up the underside last weekend, and checked last night and it looks like the oil is leaking/dripping from this (photo below). It kind of looks like it might be coming down from the oil-filter housing, but was looking for thoughts and options before I started ripping things apart.. Thanks again for the help. Dan
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Old 05-26-2017, 11:13 AM   #407
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At this age/mileage, EVERYTHING is busted and torn rotted and twisted. EVERYTHING. Redo all the common stuff that leaks on these cars.
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Old 05-26-2017, 04:55 PM   #408
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Originally Posted by rednex View Post
Great thread I have looked/read through as much of the thread as I can. and need some help find a leak. 2002 325Ci that has been leaking pretty good into the under-pan for about 3 months. I de-greased and cleaned up the underside last weekend, and checked last night and it looks like the oil is leaking/dripping from this (photo below). It kind of looks like it might be coming down from the oil-filter housing, but was looking for thoughts and options before I started ripping things apart.. Thanks again for the help. Dan
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Old 05-27-2017, 12:49 AM   #409
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^ Great Video. Thanks for sharing.
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Old 05-27-2017, 09:38 AM   #410
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^ Great Video. Thanks for sharing.
NP,

Yeah, wish I hadda seen it before I got started. I may have yanked it all out and sealed it up all at once.
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Last edited by Fox Fader; 05-27-2017 at 09:39 AM.
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Old 01-19-2018, 01:03 AM   #411
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Originally Posted by Suryateja View Post
Ok, so update : I have changed my coolant expansion tank... but im still having a leak. Its coming from the seam where the upper radiator hose connects into the radiator. The upper hose has 2 connections.. one goes to the radiator and the small one to the expansion tank. The small one is not seating properly into the male connector of the tank.

Also, when i take it for a short drive, i can see steam forming up and evaporated from somewhere beneath the upper hose....Help needed!!!
In order to get the small connection to seal you need to push back on the expansion tank toward the hose until you hear a click. At this time the wire in the hose connection will have found the slots in the female part of the expansion tank. If the wire is not in the slots it will tend to float up.

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Old 01-19-2018, 01:06 AM   #412
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Originally Posted by Suryateja View Post
Ok, so update : I have changed my coolant expansion tank... but im still having a leak. Its coming from the seam where the upper radiator hose connects into the radiator. The upper hose has 2 connections.. one goes to the radiator and the small one to the expansion tank. The small one is not seating properly into the male connector of the tank.

Also, when i take it for a short drive, i can see steam forming up and evaporated from somewhere beneath the upper hose....Help needed!!!
In order to get the small connection to seal you need to push back on the expansion tank toward the hose until you hear a click. At this time the wire in the hose connection will have found the slots in the female part of the expansion tank. If the wire is not in the slots it will tend to float up.

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Old 01-19-2018, 06:26 AM   #413
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Maybe some residue is stopping the spring clip from seating? Is there an o-ring? Maybe a little spray of silicone lubricant will help...
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Old 01-20-2018, 02:17 AM   #414
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Originally Posted by CORVAIRWILD View Post
Maybe some residue is stopping the spring clip from seating? Is there an o-ring? Maybe a little spray of silicone lubricant will help...
Do not use any chemicals like silicone on these connections. They will contaminate the rubber o-ring seals resulting in leakage. You can wet the seals with water or antifreeze but that is all. The clips should be in the down position before seating. Again press the hoses large and small over their male counterparts. Listen for the clips clicking into place. Put one hand on the top of the reservoir and one on the small hose and press them toward each other. You may see the hose and reservoir finally come together and properly seat if they were not previously.

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Last edited by rwoolverton; 01-20-2018 at 02:22 AM.
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Old 01-27-2018, 08:16 AM   #415
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Thanks OP, fantastic information, extremely helpful!
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Old 03-02-2018, 09:47 PM   #416
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Beware getting some shops to do the belts and other important (and even seemingly unimportant) items, not only do they do dumb things like losing bearing covers, many buy the cheapest parts they can for old cars that come in, so you don't get decent replacements like INA (OE) pulleys and instead get Chinese parts- so many are bad copies, so they leak or fail or cause a catastrophic failure.

Factory belts systems are great and very reliable, the belt is always the first part to fail so with any luck you hear it before it gets critical. With dodgy parts of varying age, anything can happen. Best to carry out the belt service according to BMW procedure, which replaces the wear parts in the right way to keep it all reliable.

However, fix your leaks first, as this great thread advises ;-)

Here is a good example I made after fixing a coolant leak noticeable every morning on a late 2002 325i;

How to deal with cheap-ass replacement coolant sensors that don't fit!

Last edited by ThreeM30s; 03-02-2018 at 09:54 PM.
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Old 05-09-2018, 03:30 PM   #417
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Thanks for the pics on original post. I just recently had an oil leak on my 2001 325i, it is dripping on the rear passenger side underneath of engine off the cover underneath. Any thoughts? Will work on a pic in the meantime.
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Old 05-10-2018, 09:29 AM   #418
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Originally Posted by bludevil323i View Post
Thanks for the pics on original post. I just recently had an oil leak on my 2001 325i, it is dripping on the rear passenger side underneath of engine off the cover underneath. Any thoughts? Will work on a pic in the meantime.
My first thought is valve cover gasket.
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Old 05-11-2018, 11:01 AM   #419
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My first thought is valve cover gasket.
That's my first guess, too.
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Old 05-15-2018, 03:15 PM   #420
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Thanks. I just ordered one and hopefully that will take care of things.
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