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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #26  
Old 08-24-2013, 10:28 AM
duval73 duval73 is offline
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Re: E36 Cooling System 101: What you need to know

ZeGerman is the man thanks for your help and posts!

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  #27  
Old 09-20-2013, 05:51 PM
Naptown Pete Naptown Pete is offline
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I wish I read this before I took my car to the dealership.
After driving it away there's steam coming out from under the hood, and the needle rises to just before the red.
Dammit.
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  #28  
Old 09-20-2013, 06:04 PM
Naptown Pete Naptown Pete is offline
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Here's a E36 COOL KIT kit from http://www.bavauto.com/ for $ 294.95
Radiator - Nissens
Fan Shroud Rivets
Radiator Expansion Tank
Upper Radiator Hose
Lower Radiator Hose
Hose Clamps
Expansion Tank Bleeder Screw
Water Pump & Gasket - With Upgraded Metal Impeller - Meyle
Thermostat & Gaskets
Aluminum Thermostat Housing
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  #29  
Old 09-22-2013, 12:48 PM
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ZeGerman ZeGerman is online now
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Quote:
Originally Posted by Naptown Pete View Post
I wish I read this before I took my car to the dealership.
After driving it away there's steam coming out from under the hood, and the needle rises to just before the red.
Dammit.
If that's the case, the dealership did not bleed air out of the system, and they are liable for any damages incurred. You may be okay, but you may have compromised your head gasket by overheating the engine. Call the dealer immediately and tell them what happened.
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Last edited by ZeGerman; 09-22-2013 at 12:51 PM.
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  #30  
Old 10-02-2013, 10:47 PM
Jettail Jettail is offline
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Wow....I never would have known about this otherwise, thanks for the heads up!

I will Definetly get that looked at ASAP, just got my E36 today, better get the cooling system checked and worked on in the next few days.
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  #31  
Old 10-03-2013, 08:38 AM
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ZeGerman ZeGerman is online now
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Yeah, just remember, having your cooling system "looked at" or "checked" simply is not sufficient. If it hasn't been replaced in the last 75k miles, it needs to be replaced in its entirety, even if it is currently working perfectly and not leaking.
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  #32  
Old 10-26-2013, 01:18 AM
jpnjpnjpn jpnjpnjpn is offline
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Quote:
Originally Posted by Naptown Pete View Post
Here's a E36 COOL KIT kit from http://www.bavauto.com/ for $ 294.95
Radiator - Nissens
Fan Shroud Rivets
Radiator Expansion Tank
Upper Radiator Hose
Lower Radiator Hose
Hose Clamps
Expansion Tank Bleeder Screw
Water Pump & Gasket - With Upgraded Metal Impeller - Meyle
Thermostat & Gaskets
Aluminum Thermostat Housing
That is AWESOME. Buying with next paycheck!

How many hours of labor will I have to pay for someone to do it all?
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  #33  
Old 11-04-2013, 08:24 PM
Oneslowturtle Oneslowturtle is offline
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I bought my first bmw on saturday and my radiator hose blew off, now I have an oil leak. One day of ownership in and I can smell the time for learning the bmw engine.
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  #34  
Old 11-05-2013, 04:39 PM
Oneslowturtle Oneslowturtle is offline
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Quote:
Originally Posted by Oneslowturtle View Post
I bought my first bmw on saturday and my radiator hose blew off, now I have an oil leak. One day of ownership in and I can smell the time for learning the bmw engine.
Think I may have blown the head gasket. Seeing that the leak happened right after the cooling issue. I'm at 140k and am guessing I need a new cooling system. Thanks a ton for the right up.
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  #35  
Old 11-05-2013, 06:57 PM
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ZeGerman ZeGerman is online now
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Perform a cylinder compression test to find out if you have a blown head gasket.
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  #36  
Old 11-11-2013, 10:30 PM
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dwonda dwonda is offline
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What a nice comprehensive write up! I would just like to say though, that I had a thermostat problem with my '95. Engine got hot enough to trigger the danger light in the temp gauge (was idling at the time while I was looking under the hood) as soon as I got back int he car and noticed the light, I stepped on the gas to get the fan speed up, and water flowing better, and it came back down, but I didn't warp a cylinder head or blow my head gasket, I guess that makes me lucky.
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  #37  
Old 11-11-2013, 11:00 PM
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ZeGerman ZeGerman is online now
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Yeah, you got lucky. These engines really don't like being overheated at all. It's a combination of the aluminum cylinder head in addition to being an inline-6 engine configuration. The longer the cylinder head, the easier it is to warp. So, long head + aluminum + overheat = not fun.
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  #38  
Old 11-11-2013, 11:29 PM
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dwonda dwonda is offline
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HUmm, and hear I thought european cars had short cylinder heads, or maybe just shorter strokes. I know nussing!
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  #39  
Old 11-12-2013, 09:14 AM
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ZeGerman ZeGerman is online now
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Well, they can't have shorter cylinder heads because the engines have the same number of cylinders... And the European M3 engines have a larger bore and longer stroke.
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For sale: E30/E36 front sway links
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Last edited by ZeGerman; 11-12-2013 at 09:17 AM.
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  #40  
Old 11-12-2013, 11:17 AM
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Because what engines have the same number of cylinders?
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  #41  
Old 11-12-2013, 12:53 PM
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You said in your earlier post that you thought Euro cars had shorter cylinder heads than our cars, but this obviously cannot be the case since Euro E36s still have inline-6 and inline-4 engines. Cylinder head length is determined by the number of cylinders, and how they are configured. An inline-6 cylinder head is considered to be very long, since it has all 6 cylinders lined up in a row, rather than with a V6 configuration, where it would have two shorter banks of three cylinders per side. An inline-6 engine is even longer than a V8, since V8s only have four cylinders in a row per side.
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For sale: E30/E36 front sway links
For sale: OEM E36 328 catback

Last edited by ZeGerman; 11-12-2013 at 12:56 PM.
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  #42  
Old 11-12-2013, 12:54 PM
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dwonda dwonda is offline
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Oh haha no you misunderstood. I am comparing European cars in general (all of our cars) to domestic cars.
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  #43  
Old 11-14-2013, 11:24 AM
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dwonda dwonda is offline
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Why on earth would you replace the just the fan and not the fan clutch? The plastic fan blades are the last thing I would worry about breaking lol! And since when is the A/C pump part of the cooling system?

Last edited by dwonda; 11-14-2013 at 11:26 AM.
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  #44  
Old 11-14-2013, 11:36 AM
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Originally Posted by dwonda View Post
The plastic fan blades are the last thing I would worry about breaking lol!
Well, prepare to have your mind blown... You need to replace the fan more frequently than the clutch because the fan is plastic, and is known for becoming brittle and sending fan blades into the hoses, radiator, and hood. It is not a myth - it happens, and has happened to members here. It's same reason you need to replace everything else in the cooling system (brittle plastic...). Fortunately, the fan clutch has a much longer service life. Additionally, the fan clutch can be tested for proper functionality, and when it does eventually go bad, it won't fail in such a way that would take out other parts in the process.

The A/C is NOT part of the cooling system, obviously, but when you have to remove the A/C belt to replace the main drive belt, most people will want to simply replace both at the same time. It doesn't make sense to replace the main belt and then put the old A/C belt back on when it only costs something like $10-15.
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1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback

Last edited by ZeGerman; 11-14-2013 at 11:40 AM.
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  #45  
Old 11-14-2013, 11:57 AM
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Does the word "into" imply penetration in this context?
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  #46  
Old 11-14-2013, 12:49 PM
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Yes, when the fan blades let go, they can (and do) sever coolant hoses, puncture the radiator core, and dent the hood.
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View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback
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  #47  
Old 11-14-2013, 03:39 PM
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dwonda dwonda is offline
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Humf, sounds rediculous. What mileage does this usually happen at? How does a plastic fan blade go through the insulation of my hood and dent steel? I guess I'll believe it if I see it.
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  #48  
Old 11-14-2013, 09:13 PM
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dc_wright dc_wright is offline
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When you work through the math at 6K rpms your fan blade tips are moving at about 500 feet per second. That's about the speed of a pellet out of a pellet pistol. Think a pellet would put a dent if you fired it into your hood? You bet it would. Now multiply the pellet mass by about 1000 to equal the mass of a fan blade and fire that into your hood at the same velocity. Think that would cut through your insulation and make a dent in your hood? I'd put good money on it.
My fan shucked off two blades as I was backing into the garage. Even at that low rpm the hose connection to the coolant reservoir was sheared off and a nice chunk was taken out of the fan shroud.
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  #49  
Old 11-14-2013, 09:31 PM
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dwonda dwonda is offline
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What's a fan shroud? <--nvm I just remembered.

I think there is a lot of implied math in what you're saying here. To figure out how fast the tips of the fan are moving you need to have radius or circumference, and somehow convert rpm's to ft/s or whatever you want. To make it more complicated you have to factor in your fan clutch somehow and how hard its engaged.

Now do I think a pellet from a pistol would dent my car? OF COURSE it would, you're comparing apples and grenades. You have a spherical pellet (or the ones with the skirts) that theoretically has an infinitely small surface area against something flat, AND its actually made of metal! So in other words you have a great combination of a really tiny surface area WITH density, WITH hardness. Ya it will dent my car.

On the other hand a single plastic fan blade has a very large surface area and shape that just happens to be designed for catching air, made out of a SOFT material with a density no where close to a pellet.

With that said, I CAN see now how a fan blade could be whipped off at the RIGHT moment to dent my hood...

So how many miles did your car have when it happened?

Last edited by dwonda; 11-14-2013 at 09:34 PM.
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  #50  
Old 11-14-2013, 09:36 PM
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dwonda dwonda is offline
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Quote:
Originally Posted by dc_wright View Post
When you work through the math at 6K rpms your fan blade tips are moving at about 500 feet per second. That's about the speed of a pellet out of a pellet pistol. Think a pellet would put a dent if you fired it into your hood? You bet it would. Now multiply the pellet mass by about 1000 to equal the mass of a fan blade and fire that into your hood at the same velocity. Think that would cut through your insulation and make a dent in your hood? I'd put good money on it.
My fan shucked off two blades as I was backing into the garage. Even at that low rpm the hose connection to the coolant reservoir was sheared off and a nice chunk was taken out of the fan shroud.

Wait dude, wtf R.I.P. November 14th, 2013? What is that all about?
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