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Just a few engine pics from work lately. Not for the faint hearted!

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Just a few engine pics from work lately. Not for the faint hearted!

 
Old 04-15-2009, 11:07 PM
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Just a few engine pics from work lately. Not for the faint hearted!

I had a couple V12s that I was working on recently. One was a missfire on cyl. 12 at 5200 rpms in 3rd gear, the other, had an oil leak from the oil cooler in the v of the block. Neither were too serious, but very labor intensive. Did you know that to remove a cylinder head on the bi-turbo v12s you must remove the engine due to the turbo plumbing? Enjoy the pics!

Nick
Attached Thumbnails Just a few engine pics from work lately.  Not for the faint hearted!-img00116.jpg   Just a few engine pics from work lately.  Not for the faint hearted!-img00128.jpg   Just a few engine pics from work lately.  Not for the faint hearted!-img00129.jpg   Just a few engine pics from work lately.  Not for the faint hearted!-img00130.jpg   Just a few engine pics from work lately.  Not for the faint hearted!-img00117.jpg  

Just a few engine pics from work lately.  Not for the faint hearted!-img00098.jpg  

Last edited by nick 55; 04-15-2009 at 11:30 PM.
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Old 04-16-2009, 07:42 AM
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SOLD 04 E55 Now 93 w124 3.2 sold W210 E55 sold waiting on W211 E63 p030
Those turbo's look pretty big. Off hand do you know how much they flow?
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Old 04-16-2009, 08:20 AM
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Are you doing anything beyond the repairs?
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Old 04-16-2009, 08:43 AM
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Cool pics....thanks for sharing!
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Old 04-16-2009, 08:47 AM
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Great pics....
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Old 04-16-2009, 09:04 AM
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The engine out of the car got some Kleemann ecus while I had it apart, and also had the trans overhauled. Thanks to Cory at Kleemann, they run a top notch operation over in Colorado. The photo of the engine in the SL65 already had everything Renntech has to offer for that car. It just had a weak intake valve spring. That was a very tricky problem to find.
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Old 04-16-2009, 09:15 AM
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Do you see a lot of random problems with the M275-based V12's?
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Old 04-16-2009, 11:03 AM
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No, they really are great engines, I just happen to a) know what I'm doing with them, and b) seem to attract weird or rare problems. The 275 isn't real complex, it's just the fact that just about anything you do is so labor intensive.

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Old 04-16-2009, 03:07 PM
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Originally Posted by nick 55 View Post
The photo of the engine in the SL65 already had everything Renntech has to offer for that car. It just had a weak intake valve spring. That was a very tricky problem to find.
Out of curiosity, how did you ultimately diagnose the valve spring as I would agree that it would be a VERY difficult problem to track down.
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Old 04-16-2009, 05:45 PM
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Originally Posted by nick 55 View Post
The engine out of the car got some Kleemann ecus while I had it apart, and also had the trans overhauled. Thanks to Cory at Kleemann, they run a top notch operation over in Colorado. The photo of the engine in the SL65 already had everything Renntech has to offer for that car. It just had a weak intake valve spring. That was a very tricky problem to find.
Was the SL65 white by any chance?
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Old 04-16-2009, 10:38 PM
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Originally Posted by Bisco View Post
Was the SL65 white by any chance?
No, the SL65 was a Majestic Black car, however I know of the white SL you are referring too. He's a client of mine too.

The valve spring was brutal to diagnose, and was the result of about 20 hours of testing, and trying parts out. This car had a misfire on cylinder 12 at 5200 rpms. The only way I was able to duplicate the miss was in 3rd gear. The customer wasn't lying when he said the Check Engine Light came on when driving hard. I had MB's Technical Services involved and we had ruled out the ignition system, all of the Renntech software(thanks to Jeff at Renntech, he was very cool and helpful to me), just about everything. MB even had me gap the plugs tighter twice to ensure it wasn't a bad spark. I had borescoped the engine, and forwarded the results to MB, we had pretty well run out of ideas, and during a brainstorming session I brought up the possibility of valve float. We all said that there is no way, but I really didn't have many other options. So, I tore back into the engine, and took out the valve springs (all the springs are the same part number) for the #12 cylinder(no easy task). Upon inspection, we found one of the intake valve springs was 1mm shorter than the other 2. I replaced them, and drove the car 20 miles without getting it to act up. So far, the car has gone another 300 miles without issue. My customer was actually happy I burned through 4 tanks of fuel in 220 miles while I was working on his car.

Nick
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Old 04-17-2009, 12:43 AM
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Originally Posted by nick 55 View Post
I had a couple V12s that I was working on recently. One was a missfire on cyl. 12 at 5200 rpms in 3rd gear, the other, had an oil leak from the oil cooler in the v of the block. Neither were too serious, but very labor intensive. Did you know that to remove a cylinder head on the bi-turbo v12s you must remove the engine due to the turbo plumbing? Enjoy the pics!

Nick
Thanks for sharing Nick, interesting stuff - and I have question for you engine expert. Looking at that oil filter housing: I noticed when changing the filter on this engine, there is no oil up there. Does that mean the whole filter cavity drains when the engine stops and each time the engine starts there is five minutes of oil starvation? I know that is not possible - so how does that work?
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Old 04-17-2009, 01:22 AM
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No, there is a check valve at the oil pump. When you loosen the filter, it releases the 3 lower o-rings on the filter assembly and that causes all the oil to drain back into the oil pan. I dont recommend this, but if you were to remove the filter very fast while the engine is cold, you would notice that it is full of oil. When the oil is hot, it drains down much faster when you loosen the filter.

Nick

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Old 04-17-2009, 08:53 AM
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WTF, why can't I find somebody as dedicated as you down here in FL?

If that was my car/indy/dealer, they would have replaced everything in the car twice by now and still not found the problem...
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Old 04-17-2009, 09:24 AM
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Originally Posted by nick 55 View Post
The valve spring was brutal to diagnose, and was the result of about 20 hours of testing, and trying parts out. This car had a misfire on cylinder 12 at 5200 rpms. The only way I was able to duplicate the miss was in 3rd gear. The customer wasn't lying when he said the Check Engine Light came on when driving hard. I had MB's Technical Services involved and we had ruled out the ignition system, all of the Renntech software(thanks to Jeff at Renntech, he was very cool and helpful to me), just about everything. MB even had me gap the plugs tighter twice to ensure it wasn't a bad spark. I had borescoped the engine, and forwarded the results to MB, we had pretty well run out of ideas, and during a brainstorming session I brought up the possibility of valve float. We all said that there is no way, but I really didn't have many other options. So, I tore back into the engine, and took out the valve springs (all the springs are the same part number) for the #12 cylinder(no easy task). Upon inspection, we found one of the intake valve springs was 1mm shorter than the other 2. I replaced them, and drove the car 20 miles without getting it to act up. So far, the car has gone another 300 miles without issue. My customer was actually happy I burned through 4 tanks of fuel in 220 miles while I was working on his car.

Nick
I'm impressed as while I have found plenty of odd problems over the years, that takes the cake.
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Old 04-17-2009, 01:42 PM
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Awesome job Nick!
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Old 04-17-2009, 01:55 PM
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wow im very impressed too....great work and made respect to you!
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Old 04-17-2009, 03:16 PM
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Nick,

Nice work! Houston Texas needs you!
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Old 04-17-2009, 04:23 PM
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I would be more than happy to help anyone that ships their car to me from Houston, Florida, Cali, etc.....

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