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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 09-06-2006, 10:15 AM   #1 (permalink)
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"Floating valves"

Hey crew, just me again...
I have more of a tech question. I was told when I bought my car that at 4500rpm, I'd "float the valves". From what I understand, it's a condition of old, tired valve springs, is that right?
If so, is it a job I can do on my own? I have checked prices online for springs, but am not sure if that's all that would need to be replaced to get it good to go. I am comfortable enough twisting wrenches that I feel i can tackle it, or is it just too involved to do in my garage(well equipped mind you).

Thanks in advance!
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Old 09-06-2006, 10:21 AM   #2 (permalink)
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To replace the vavlve spring in any head i have ever worked on, you pulled the head. Usually you need a spring compressor (not the coil spring kind), it's kind of a giant vise grip thing with a plate on one end and a split cup on the other so you can remove the valve spring keepers. Defintiely not as job you would want to tackle on your own with out the necessary tools. You might be able to do it without head removal, but if you dropped a valve...BIG problem. Better off letting a pro do it for you.
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Old 09-06-2006, 04:03 PM   #3 (permalink)
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Quote:
Originally Posted by PhatCat
Hey crew, just me again...
I have more of a tech question. I was told when I bought my car that at 4500rpm, I'd "float the valves". From what I understand, it's a condition of old, tired valve springs, is that right?
If so, is it a job I can do on my own? I have checked prices online for springs, but am not sure if that's all that would need to be replaced to get it good to go. I am comfortable enough twisting wrenches that I feel i can tackle it, or is it just too involved to do in my garage(well equipped mind you).

Thanks in advance!
no the problem is the engine is only designed for 4500 rpms, because the stock springs are so soft. Ideally you just want to instal an i Cam and i Valve springs and that should be that. With an aftermarket chip you will get 5300-5500 rpms depeneding on make...
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Old 09-06-2006, 04:57 PM   #4 (permalink)
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The eta motors suck for high end. I can't stress this enough. It's like trying to string out an overweight toddler on Xanax.
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Old 09-06-2006, 05:35 PM   #5 (permalink)
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this spawned an idea for me, im starting a thread.
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Old 09-06-2006, 07:35 PM   #6 (permalink)
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If you stap an I cam into an ETA head with out drilling the proper oil holes you will kill the cam and head....
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Old 09-07-2006, 09:03 AM   #7 (permalink)
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Quote:
Originally Posted by Starmavin
If you stap an I cam into an ETA head with out drilling the proper oil holes you will kill the cam and head....
sorry i forget i shouldnt assume people just know these things lol
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Old 09-07-2006, 04:34 PM   #8 (permalink)
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Quote:
Originally Posted by gotKRAUT
sorry i forget i shouldnt assume people just know these things lol
Hahaha, you're such a dick sometimes.
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Old 09-07-2006, 05:15 PM   #9 (permalink)
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Thanks everyone...I never did plan on running it beyond the redline(naturally), but though that maybe things would start blowing up if I pushed it a wee bit farther if I got destracted by a skirt on the sidewalk or something . Will that comment get me in hot water with the ladies? I've been looking at picking up a Dinan chip...+28hp, +24lb/ft, and +400rpm. All for under 50 bucks...not bad eh?
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Old 09-07-2006, 05:35 PM   #10 (permalink)
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aftermarket chips for the eta feel really good. i had one on mine and seat of thepants improvement was very noticable.
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Old 09-07-2006, 10:34 PM   #11 (permalink)
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I'm looking forward to it, ordered it this afternoon after work. Hope it shows up mid week. Sounds easy enough to do as well. I'm glad to hear that people have had such good success with them and they make such a marked difference. Bring the torque!
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Old 09-09-2006, 07:02 AM   #12 (permalink)
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The only withdraw with a chip is you must run premium gas, or risk damaging detonation.
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Old 09-10-2006, 02:33 AM   #13 (permalink)
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Yeah, premium it is...it might hurt a bit more at the pump, but as far as I'm concerned, it's a small price to pay(no pun intende) for the added fun factor
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Old 09-10-2006, 03:53 AM   #14 (permalink)
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Where'd you find a Dinan chip for $50? Thought they ran about $200.
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Old 09-10-2006, 05:44 PM   #15 (permalink)
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Ebay, but some are "other brands" but boast the same results.
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