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  #16  
Old 03-20-2013, 07:16 PM
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Its a BMW V12.

Fortunately my Benz had an amazingly clean valve line. In fact, I was shocked when I opened up the covers one day. Unlike the BMW, it was well cared for.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car
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  #17  
Old 03-20-2013, 08:50 PM
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The real issue is that this car has been very badly maintained.
If if you successfully clean out the sludge out of the engine some other problem will surely raise up.
If the engine hasn't had oil changes, how are the transmission, diff, brake fluid and coolant?

Unfortunately when I see engines like this I also see money pit written all over the car.
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  #18  
Old 03-20-2013, 09:41 PM
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Motor flush can be just that, it flushes the engine down the drain. The sludge that was sitting dormant through the engine has to go somewhere once it is cut loose. It ends up in the pan where is it promptly sucked into the oil pickup where it plugs the screen starving the enigne for oil.

If your engines cylinder heads are fed through a oil restrictor / small passages, can you poke a wire throigh the hole to make sure things are clean?

The lash adjusters / hydraulic lifters that were fully extended didn't cause the cam to wear, poor oiling caused it to wear. The cam sees much more load at full lift than a lifter barely holding the valve open.
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  #19  
Old 03-20-2013, 09:41 PM
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how far is it dismantled? Maybe just get it hot-dipped, then it will be clean enough to eat off of.

Quote:
Originally Posted by 97 SL320 View Post
Motor flush can be just that, it flushes the engine down the drain. The sludge that was sitting dormant through the engine has to go somewhere once it is cut loose. It ends up in the pan where is it promptly sucked into the oil pickup where it plugs the screen starving the enigne for oil.

If your engines cylinder heads are fed through a oil restrictor / small passages, can you poke a wire throigh the hole to make sure things are clean?

The lash adjusters / hydraulic lifters that were fully extended didn't cause the cam to wear, poor oiling caused it to wear. The cam sees much more load at full lift than a lifter barely holding the valve open.
Which just happened and wiped his cam
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  #20  
Old 03-20-2013, 10:04 PM
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Quote:
Originally Posted by 97 SL320 View Post
Motor flush can be just that, it flushes the engine down the drain. The sludge that was sitting dormant through the engine has to go somewhere once it is cut loose. It ends up in the pan where is it promptly sucked into the oil pickup where it plugs the screen starving the enigne for oil.

If your engines cylinder heads are fed through a oil restrictor / small passages, can you poke a wire throigh the hole to make sure things are clean?

The lash adjusters / hydraulic lifters that were fully extended didn't cause the cam to wear, poor oiling caused it to wear. The cam sees much more load at full lift than a lifter barely holding the valve open.
Which is why the pan will be pulled in my case and why I dont want to run an oil additive.

Passages are large and clear as best as I can tell.

Some lifters were froze in the upper position. Odd, yes, but the car did sit a lot. Especially the past couple of years. The lifters are rebuilding nicely though. Probably only going to replace two of them.
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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car
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  #21  
Old 03-20-2013, 10:07 PM
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Quote:
Originally Posted by Volker View Post
how far is it dismantled? Maybe just get it hot-dipped, then it will be clean enough to eat off of.



Which just happened and wiped his cam
Well the oiler rails where practically off, wrecking the cam. The other cam is in good condition thankfully. I would love to hot dip or oven bake the block. But that is more work than I am willing to do on a free car. Overall the car is in great shape for its age.

By the way, the transmission fluid is sealed in for life. But I will be changing it. Someone mentioned this fluid may not have been changed.
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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car
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  #22  
Old 03-21-2013, 07:58 AM
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Are you talking about the 92 BMW w/17K MILES? I have seen cars and trucks with a lot of build up of goo on the heads but all were 80K to 100K or more and never had the oil changed. I can't believe that there is that much build up in 17K even if the oil was never changed. Something is wrong with this picture. Is this goo black or tan?
When we ran into a problem like this, we first told the customer that we would not be responsible for any thing if they requested we continue. We would then take a shop vac and screw drivers or what ever and scrape and vacuum at the same time trying to not let anything fall down into the engine. Then spray everything down with brake cleaner. Then flush with a gallon or 2 with brake cleaner with the drain plug out. Oil everything in the heads with oil, new filter, new cheap oil over filled about a quart. Start engine and run until engine temp was up to normal but not drive. Change the oil and filter and run again. At this point, pull the valve covers and see what was getting oil and clean as necessary. Change oil and filter again and this time drive about 10 miles. Come back and check again for proper oiling in the heads. Yes this was expensive and time consuming. When it comes to service, pay a little now or a LOT later.

Paul

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