1st m96.3 rebuild I just have one question...?
04-06-2015, 05:13 PM
#1
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1st m96.3 rebuild I just have one question...?
I rebuilt my 1st porsche engine which is this m96 3 chain motor and I started the engine up it runs way way better than when I took it apart but I got code 22 BANK 2 exhaust can over retarded... My observation is that when the crank pully is pinned at OD... Banks 1&2 ALL the camshaft slots line up at the same time... This this right or do I have to take the bolts out of bank 2 cams spin the crank 360 back to U6 and re time bank 2?
04-06-2015, 05:59 PM
#3
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Set cam timing on bank 1 @ TDC, and complete the process. Then, rotate the engine exactly 360 degrees back to TDC, then set the cam timing on bank 2.
Do this in no other way.
Do this in no other way.
04-06-2015, 06:32 PM
#5
Former Vendor
I would start from scratch and quantify timing on bank 1 as well. The first rule of engine rebuilding is to assume nothing and to quantify everything.
Once bank 1 is good, rotate the engine 360 and do bank 2. Ensure the tensioners are pumped up and also rotate the engine at least 7 times clockwise and recheck both banks before calling it good. The tools must fall into place with the crank pinned @ TDC for the timing to be spot on.
Once bank 1 is good, rotate the engine 360 and do bank 2. Ensure the tensioners are pumped up and also rotate the engine at least 7 times clockwise and recheck both banks before calling it good. The tools must fall into place with the crank pinned @ TDC for the timing to be spot on.
04-06-2015, 06:32 PM
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So as I understand it ALL the slits that line up the cams should NOT all be perfectly lined up as the same time. I have to line the bank 1 cams up then rotate the crank 360 and then line up bank 2 cams.. So right now I'm a whole 360 degrees on bank 2 which sounds insane but I am I only took apart bank 2...
04-06-2015, 06:34 PM
#7
Former Vendor
This is a common mistake, you have phased both banks the same, making 2, 3 cylinder engines!
The offset slots should be opposite each other when timing is properly set. Let me guess, the engine only ran on bank 1 after reassembly, and while on the starter it was very difficult to turn over?
The offset slots should be opposite each other when timing is properly set. Let me guess, the engine only ran on bank 1 after reassembly, and while on the starter it was very difficult to turn over?
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04-06-2015, 06:48 PM
#8
This is a common mistake, you have phased both banks the same, making 2, 3 cylinder engines!
The offset slots should be opposite each other when timing is properly set. Let me guess, the engine only ran on bank 1 after reassembly, and while on the starter it was very difficult to turn over?
The offset slots should be opposite each other when timing is properly set. Let me guess, the engine only ran on bank 1 after reassembly, and while on the starter it was very difficult to turn over?
04-06-2015, 07:10 PM
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Yes that what I thought so now I have to find a way to turn the motor 360 and retime bank two easiest way possible? Idk? And yes this motor came in blowing huge clouds of smoke and slapping really badly this is my first porsche engine I've build so sorry for my ignorance your help is greatly appreciated...
04-06-2015, 07:33 PM
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This is my first experience with a porsche of any kind really... So I called every porsche parts place around with the same answer $7.5 for both cylinder halves and $718/piston... I called L&N and didn't like there price either also they were on a waiting list.... So I sent the block to my machine shop guy he bored it .030 recoated it and ordered 3 .030 Pistons from JE that were 28 grams too light so we got 28 gram heavier wrist pins put it all back together and almost had a running car!! I missed that one step tho!!!
04-06-2015, 07:38 PM
#13
Former Vendor
This is my first experience with a porsche of any kind really... So I called every porsche parts place around with the same answer $7.5 for both cylinder halves and $718/piston... I called L&N and didn't like there price either also they were on a waiting list.... So I sent the block to my machine shop guy he bored it .030 recoated it and ordered 3 .030 Pistons from JE that were 28 grams too light so we got 28 gram heavier wrist pins put it all back together and almost had a running car!! I missed that one step tho!!!
04-06-2015, 08:05 PM
#14
