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Discussion Starter · #1 ·
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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Manualaholic
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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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Discussion Starter · #4 ·
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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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.

Sent from my ADR6410LVW using BimmerApp mobile app
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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Discussion Starter · #6 ·
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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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.

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-Wate...0698560871&pt=Motors_Automotive_Tools&vxp=mtr

http://youtu.be/7Hr3Geh5HjA
 

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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?
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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Aye, looks like primary fan blades.
 

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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?
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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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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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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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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Discussion Starter · #14 ·
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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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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Manualaholic
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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! :thumbup:
 
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