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AZBMW Forums › Model Specific Discussion › Other BMW Models › E23 sludge of death
E23 sludge of death
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bmw325i
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PostPosted: Thu Nov 04, 2010 6:53 pm
Post subject: E23 sludge of death

My dad decided to change the engine oil on his 745i euro '84 , he looked inside the oil fill cap, the crankshaft was covered in sludge. I mean he swiped his finger and picked up a good layer, looked nasty. Now what guys?

How do we go about removing that crap from the engine, any ideas, tips are welcome.
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Stevohill
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PostPosted: Thu Nov 04, 2010 6:58 pm
Post subject: Re: E23 sludge of death

Seafoam?

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flip
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PostPosted: Thu Nov 04, 2010 8:46 pm
Post subject: Re: E23 sludge of death

Slightly offtopic: Is this car parked at 13th Street and Jefferson or is there more than one e23 745i in the Phoenix area? I work across the street from a house that has an e23 745i parked outside of it. Looks like its in rough shape though :-/
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bmw325i
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PostPosted: Fri Nov 05, 2010 2:00 am
Post subject: Re: E23 sludge of death

flip wrote:
Slightly offtopic: Is this car parked at 13th Street and Jefferson or is there more than one e23 745i in the Phoenix area? I work across the street from a house that has an e23 745i parked outside of it. Looks like its in rough shape though :-/

No, car is located near 43rd ave and Glendale.
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wkohler
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PostPosted: Fri Nov 05, 2010 3:37 am
Post subject: Re: E23 sludge of death

There are about 20 more in the valley, too. There were more than 600 of those imported into the US back in the '80s. I just looked at one the other day, but decided that even for $1500, it wasn't worth it to me.

I don't know how you get the sludge out. Should change the oil more often, for one. You could try some Seafoam in the crank case, but I'm not sure what that will do.

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bmw325i
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PostPosted: Fri Nov 05, 2010 1:53 pm
Post subject: Re: E23 sludge of death

Would running an ATF through it help out, i came across on some websites that the ATF may help out with sludge, but that was on tractor engines.

Running thinner semi/ fully synthetic oil help or make it worse?
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E34Chris
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PostPosted: Sat Nov 20, 2010 5:31 pm
Post subject: Re: E23 sludge of death

Automatic transmission fluid? In the crankcase? Are you serious?
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Evilsmith
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PostPosted: Sat Nov 20, 2010 6:13 pm
Post subject: Re: E23 sludge of death

bmw325i wrote:
Would running an ATF through it help out, i came across on some websites that the ATF may help out with sludge, but that was on tractor engines.

Running thinner semi/ fully synthetic oil help or make it worse?

Before you try ATF, try dynamite.

If there is that much sludge I would honestly try to remove as much of it as possible before using additives to clean it out. If there is a lot of buildup and you use additives, it all has to go somewhere. Essentially you would be trading the sludge problem for a problem somewhere else.

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bmw325i
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PostPosted: Sun Nov 21, 2010 10:27 am
Post subject: Re: E23 sludge of death

Thanks for the input guys, no ATF was not used, it was someting I read online, like i mentioned before. We ended up opening the valve cover and cleaning with rags and diesel fuel,also used some fine soft brush to scrape hard sludge, it looks much better, even the engine sounds like a new typewriter Wink
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