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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 11-21-2012, 01:06 PM
Sephora325iX Sephora325iX is offline
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Do I need a crank scraper?

I'm working on a 1992 325i(E36) engine swap. The original motor blew a piston. So I found 1 from a 1991 E34 525i. Both are the M50 types. Besides the oil pans, the motors are identical. After going through my replacement engine, I have come into a slight stumbling block. The 525i block doesn't use a "crank scraper" bolted to the block(it has it directly in the pan). My 325i block, has a scraper bolted to the block.

I can switch everything over(Pan, pick-up tube)-but not the crank scraper. This is because, on the replacement block there are NO mounts-casted on the inside of block.

Do I need to run a crank scraper? Has anyone ever ran into this before?
If I need to run 1, any body got any ideas on the mounting setup?

Thanks.

Last edited by Sephora325iX; 11-27-2012 at 10:44 AM. Reason: Solved
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  #2  
Old 11-21-2012, 02:32 PM
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E36 Phantom E36 Phantom is offline
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I'd never heard of a difference on the internals....I really don't know, sorry.

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  #3  
Old 11-22-2012, 08:26 AM
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i believe that you may be talking about a windage tray....





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  #4  
Old 11-22-2012, 10:17 AM
Sephora325iX Sephora325iX is offline
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Hmm, that may be the right name. It is kinda like a baffle plate, to channel the oil from the block to the pan. Either way no matter what you call it, I'm still at a dilemma of needing, and if so installing one.
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  #5  
Old 11-22-2012, 10:23 AM
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Any way you could use the one out of the 525 pan to transfer over? It's got to be attached somehow. It's not cast as part of the pan, is it?

To tell the truth, you could probably run without it. A windage tray is only useful at high RPMs. Unless you're driving style involves a lot of high-revving, you can probably do just fine with no scraper/tray.
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  #6  
Old 11-22-2012, 12:06 PM
Sephora325iX Sephora325iX is offline
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Thats a good idea. But the 525i pan, had the Windage tray riveted in , and in no way could fit in the 325i pan.
I don't plan on doing a lot of high Rpm work with this engine.

However, I have found a company that makes custom Crankscrapers. It's not a windage tray, but it would be better than nothing. I'm still on the fence either way about the stock windage tray.

From what I can tell, this problem is not too common with these motors. I was quite shocked when my replacement block had no mounts casted in it. It must have been from a very early 525i.

Last edited by Sephora325iX; 11-22-2012 at 12:12 PM.
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  #7  
Old 11-27-2012, 10:43 AM
Sephora325iX Sephora325iX is offline
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After some checking around, I believe I've found an answer. I talked to a guy (Machinst)who makes crank scrapers for many different engines. He has been dealing with these engines for a quite awhile. In his opinion, I should be okay without that Windage tray. Mainly Because, my pan has another built in tray towards the bottom.

Thanks for the help. Still if there is anyone, who has ever had this problem (no windage tray mounts) I would like to hear about it. It seems to be, that mine is the only documented case of missing the mounts.
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  #8  
Old 11-27-2012, 12:04 PM
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i think that maybe people have just not payed attention to that sort of thing?? i mean, it'd not like we're running formula cars here or anything....or 10 second dragsters...no real need for a windage tray imo.



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  #9  
Old 12-01-2012, 06:24 PM
Sephora325iX Sephora325iX is offline
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Yeah I think you're right, should be fine without it.
Thanks for all of the help.
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  #10  
Old 12-03-2012, 08:12 PM
hiroshima hiroshima is offline
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A windage tray will not only keep your crankshaft from dipping into your oil at high rpm (causing parasitic drag and foaming your oil, which in some engines can cause cavitation and therfore oil starvation and eventually engine failure from it) it also keeps your oil from sloshing during hard acceleration and cornering, causing the same problems. A crank scraper removes excess oil from the crankshaft. If you look at a scraper, vs. A windage tray, they are completely different animals. Windage trays should be on all engines in some form. Crank scrapers belong on hardcore track cars. It costs a manufacturer millions to design and build an engine, especially one as durable and with as long a production run as the BMW inline 6. It wouldn't be there if it didn't need to be for one reason or another. Some of the external, emissions and drivability parts along with things designed with nvh in mind may be debatable, but am internal engine component is not. If I were spending my hard earned dollars to put an engine in my car, i would take my oil pan to my machinist, along with the oil pan off of the new motor, and tell him to make a secure attaching point on your stock pan at the same distance from the pan rail as it is on the pan off of the new motor. It should cost less than $100 and could save you premature engine failure. Worth it in my book.

Last edited by hiroshima; 12-03-2012 at 08:13 PM.
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  #11  
Old 12-03-2012, 10:10 PM
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Quote:
Originally Posted by hiroshima View Post
Crank scrapers belong on hardcore track cars
Exactly why I said he'd be fine without it. He's not running a hardcore track car, and he still has the windage tray below the crank. Much ado about nothing.
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Quotes to live by:
guessing gets expensive...drivinfaster
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buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #12  
Old 12-03-2012, 10:41 PM
hiroshima hiroshima is offline
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What I was referring to was the fact that he was saying he had no provision on the new block to run is original windage tray, as the the replacement engine has its windage tray in the oil pan and he has to run his stock pan. The solution I was offering was to have his machine shop modify his stock pan to accept the windage tray from the pan that came with the replacement engine. I gave him a little more depth of the differences because he seemed to be confused on the difference, or the interchangeably of the two. From what he was saying, if he just ran his stock pan he would have no windage tray, just the baffles in his stock oil pan, which would not be enough, most likely.
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  #13  
Old 12-04-2012, 09:03 PM
Sephora325iX Sephora325iX is offline
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Well you both raise a very good point, it's basically a gamble either way.
If I had the extra funding and time, I would try to find a better solution for this problem. However the car is in pieces and all I want to do right now is put it back togehter. Maybe this time, I can have all the cylinders working
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  #14  
Old 12-04-2012, 09:20 PM
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didja ever take pics??




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  #15  
Old 12-08-2012, 04:38 PM
Sephora325iX Sephora325iX is offline
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yeah I did. Here have a look.http://s1168.beta.photobucket.com/us.../Bmw%20Windage
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