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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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  #1  
Old 04-23-2014, 08:05 PM
Shmamuel Shmamuel is offline
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Oh CRAP. Hit the rev limiter. Something came out from underneath my car

Ok so occasionally I like to take my really old bmw 3251 e36 out for some fun. I go onto an abandoned road and do peel outs, drift, etc. well today I went our and I tried to get close to the rev limiter without going over. I was stationary, and I floored it and I hit 7000 rpms. I then heard a crack from under my car and something fell onto the ground. I have no idea what it is or what to do (( I know it was stupid and juvenile but I need to know what happened. I have a picture of what came from under my car. It is in many pieces
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  #2  
Old 04-23-2014, 08:09 PM
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goosefoot33 goosefoot33 is offline
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That would be one, or two, or three, or all of your fan blades. Replace ASAP. A word to the wise as well- do not rev past 5k without actually moving/have a load on the engine. Check your radiator and underside of your hood- there is a good chance you damaged something when they came flying off.

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  #3  
Old 04-23-2014, 08:13 PM
Eight Thirty Eight Thirty is offline
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Yes to this guy above 100% happened twice to me in two years.
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  #4  
Old 04-23-2014, 08:26 PM
Shmamuel Shmamuel is offline
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Actually it's not I just checked my fan and it's totally fine. The blades of the fan are curved and circular these pieces are straight and have a little curve. The fan is in the very front part right behind the grille and that wasn't it
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  #5  
Old 04-23-2014, 08:29 PM
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Quote:
Originally Posted by goosefoot33 View Post
That would be one, or two, or three, or all of your fan blades. Replace ASAP. A word to the wise as well- do not rev past 5k without actually moving/have a load on the engine. Check your radiator and underside of your hood- there is a good chance you damaged something when they came flying off.

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It's definitely the fan, but there is nothing wrong with revving an engine when it isn't under load. This occurrence is the result either old engine mounts or an old fan, or both. My money is on the engine mounts being so worn out that they're allowing the engine to move excessively, thus allowing the fan to make contact with the shroud.

Hopefully the OP didn't overheat his engine afterward...
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  #6  
Old 04-23-2014, 08:37 PM
Shmamuel Shmamuel is offline
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Wait are you sure it's the fan??? How far can I drive my car without it overheating?? And can I install a new one myself?
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  #7  
Old 04-23-2014, 08:40 PM
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southpark11235 southpark11235 is online now
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Quote:
Originally Posted by Shmamuel View Post
Actually it's not I just checked my fan and it's totally fine. The blades of the fan are curved and circular these pieces are straight and have a little curve. The fan is in the very front part right behind the grille and that wasn't it
You are looking at the secondary eclectic fan, not the primary fan. Open your hood and look between the radiator and engine, and you will see the broken fan.

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Originally Posted by Shmamuel View Post
Wait are you sure it's the fan??? How far can I drive my car without it overheating?? And can I install a new one myself?
Change the fan is easy with the right tools. http://www.ebay.com/itm/BMW-GM-Water..._Tools&vxp=mtr

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Last edited by southpark11235; 04-23-2014 at 08:52 PM.
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  #8  
Old 04-23-2014, 08:53 PM
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Originally Posted by Shmamuel View Post
Wait are you sure it's the fan??? How far can I drive my car without it overheating?? And can I install a new one myself?
You can install as many fans as you want, but you're going to keep breaking them until you replace the engine mounts...
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  #9  
Old 04-23-2014, 09:11 PM
Leusent Leusent is offline
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Aye, looks like primary fan blades.
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  #10  
Old 04-24-2014, 06:11 AM
JKRIT JKRIT is offline
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Quote:
Originally Posted by Shmamuel View Post
Wait are you sure it's the fan??? How far can I drive my car without it overheating?? And can I install a new one myself?
To answer the second question, you can drive it as long as the exploding fan didn't damage the radiator or cut one of the radiator hoses so that you start to leak coolant. That's why goosefoot33 suggested that you look for secondary damage under the hood. Of course, there's not much left of the fan, so idling time in traffic is going to be quite limited: watch the temperature gauge like a hawk and shut it off BEFORE the red overheat light comes on.
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  #11  
Old 04-24-2014, 06:15 AM
Leusent Leusent is offline
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JKRIT is right. Lots of people delete that fan, so you're probably OK without it for a short time.

I just want to reiterate this point: overheating your engine will be super bad. Like $2000 bad. So *make sure* nothing else was damaged when the fan detonated.
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  #12  
Old 04-24-2014, 06:17 AM
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In addition to risk of overheat while the car isn't moving, there's some risk to your water pump bearings with the fan being extremely out of balance. If you can feel vibration I'd limit the mileage you drive it. With just two blades missing on mine the increased vibration was quite noticeable.
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  #13  
Old 04-24-2014, 07:18 AM
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Quote:
Originally Posted by JKRIT View Post
To answer the second question, you can drive it as long as the exploding fan didn't damage the radiator or cut one of the radiator hoses so that you start to leak coolant. That's why goosefoot33 suggested that you look for secondary damage under the hood. Of course, there's not much left of the fan, so idling time in traffic is going to be quite limited: watch the temperature gauge like a hawk and shut it off BEFORE the red overheat light comes on.
I would not recommend driving the car without having a puller fan installed or modifying the auxiliary fan to turn on at a lower temp. Also, you need to shut the engine off if the temp needle goes even a little beyond the 12 o'clock position. If you wait until the red light turns on, you may have already caused damage due to the buffer built into the temperature gauge.
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  #14  
Old 04-24-2014, 10:28 AM
Shmamuel Shmamuel is offline
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Thanks for all the help guys I appreciate it. But I'm still not sure how to look for damage myself. Should I take it to a shop and get it checked? And also all of my gauges on my bmw are a socially useless. The rev counter and speedometer are fine but the rest are broken
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  #15  
Old 04-24-2014, 10:28 AM
Shmamuel Shmamuel is offline
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*BASICALLY useless
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  #16  
Old 04-24-2014, 10:36 AM
M-Track App M-Track App is offline
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I would definitely take it to a shop and have it checked out
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Old 04-24-2014, 12:01 PM
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Yes, since you seem largely unfamiliar with what to look for or how to fix it, I would recommend taking it to a shop. Tell them exactly what happened, and that you suspect it may be the result of bad engine mounts.
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  #18  
Old 04-26-2014, 04:50 PM
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goosefoot33 goosefoot33 is offline
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Quote:
Originally Posted by ZeGerman View Post
You can install as many fans as you want, but you're going to keep breaking them until you replace the engine mounts...
Depending on how the E36 engine bay is set up, it may not be the engine mounts (although it is very likely). My fan blade blew apart one time because the bottom of the fan shroud was snapped in half, and one of the sides of the shroud got sucked into the path of the fan blade. Sounded like a diesel engine for a few seconds while all the blades were breaking off. Sounds like something your local shop will be checking out though, good luck!
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