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beginner
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 Posted - Apr 13 2006 : 01:11:09
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I bought a head to my engine,now that i have receieved it.
When i look in the combustion (bad spelling?) chamber(where you seet both of the valves)it does not like like my other head that has a crack.
1.Please can somebody post a picture of a head for the 745i and head from a engine without a turbo.I think ive been tricked.
2.What is nessesary to do to make it work between them.
3.What is the biggest difference between the head on m102 and m106.
4.What is the right hight on the cylinderhead on 745 engine.
5.Have seen pictures on cylinderheads that looks diffrent but are for the same model of engine .
Please answer sombody a soon as possible
Thanks
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Edited by - beginner on Apr 13 2006 01:50:24
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atiTDI
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Afshin-Switzerland
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Posted - Apr 13 2006 : 06:53:19
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Well, I don't know if your car has M102 or M106... on M106 heads you can read "TURBO" engraved as big as 3 cm large on their side 
So if there's no "TURBO" to read on its side, then you probably got a M102 (3.2 L-Jet) turbo head or a N/A M30 one.
If your car has M106 (1983->1986), you'll be better to have the M30 head, cause the M102 head dosen't fit (different coolant passage design)!!!
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Regards, Afshin.
1982 745i (5-Speed)
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beginner
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beginner
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Posted - Apr 16 2006 : 03:04:12
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quote:
Originally posted by Afshin-Switzerland
Well, I don't know if your car has M102 or M106... on M106 heads you can read "TURBO" engraved as big as 3 cm large on their side
So if there's no "TURBO" to read on its side, then you probably got a M102 (3.2 L-Jet) turbo head or a N/A M30 one.
If your car has M106 (1983->1986), you'll be better to have the M30 head, cause the M102 head dosen't fit (different coolant passage design)!!!
Ok but what do i have to do to get the N/A M30 to fit except for swaping the moving parts from the old M106 cylinderhead to the N/A M30. |
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Afshin-Switzerland
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Posted - Apr 16 2006 : 06:26:59
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| So I assume you haven't read any "TURBO" engraved on your head's side wall... This means you have eighter a M102 head or a N/A M30 one... Check the exhaust side, if it's a M102 turbo head, there should be ø 10mm studs/bolts. If not, then you gotta fit ø 10mm studs instead of the existing ø 8mm ones on N/A head |
Regards, Afshin.
1982 745i (5-Speed)
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beginner
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Posted - Apr 17 2006 : 06:12:47
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quote:
Originally posted by Afshin-Switzerland
So I assume you haven't read any "TURBO" engraved on your head's side wall... This means you have eighter a M102 head or a N/A M30 one... Check the exhaust side, if it's a M102 turbo head, there should be ø 10mm studs/bolts. If not, then you gotta fit ø 10mm studs instead of the existing ø 8mm ones on N/A head
It does not say turbo on the side.
It is 10mm bolts on it so I must have a M102 turbo head.
Is there any way i can rebuild it to fit my engine.
Thaks for the help afshin |
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beginner
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Posted - Apr 17 2006 : 10:02:38
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quote:
Originally posted by Afshin-Switzerland
So I assume you haven't read any "TURBO" engraved on your head's side wall... This means you have eighter a M102 head or a N/A M30 one... Check the exhaust side, if it's a M102 turbo head, there should be ø 10mm studs/bolts. If not, then you gotta fit ø 10mm studs instead of the existing ø 8mm ones on N/A head
It does not say turbo on the side.
It is 10mm bolts on it so I must have a M102 turbo head.
Is there any way i can rebuild it to fit my engine.
What is the dfference between the M106 and the N/head except for the bolts
Thaks for the help afshin
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Afshin-Switzerland
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Posted - Apr 18 2006 : 01:22:16
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quote:
Originally posted by beginner
quote:
Originally posted by Afshin-Switzerland
So I assume you haven't read any "TURBO" engraved on your head's side wall... This means you have eighter a M102 head or a N/A M30 one... Check the exhaust side, if it's a M102 turbo head, there should be ø 10mm studs/bolts. If not, then you gotta fit ø 10mm studs instead of the existing ø 8mm ones on N/A head
What is the dfference between the M106 and the N/head except for the bolts
Thaks for the help afshin
To be honest, I don't know... 
As you forsure know, the exhaust valves are turbo-specific (Nimomemic)and the came-shaft has oder opening degrees which're also specific to turbo engines... but I do indeed haven't got a single clue about what makes a turbo head's casting so specific, in order to recieve a "TURBO" engaved on its side...(apart from those 10mm bolts)
As for fiting a M102 head on a M106, there's no way that I'm aware of, better that to just forget about it... not a good idea at all
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Regards, Afshin.
1982 745i (5-Speed)
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Velocewest
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Posted - Apr 21 2006 : 13:57:35
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Dimensionally there is nothing different about a Turbo head from a normal pre- 1988 M30 head. Same combustion chamber, same valve size, same intake and exhaust ports. As Afshin mentions, the exhaust valves are special, and the head has 10mm studs for the BMW exhaust manifold. Lots of people are running high-boost turbos on standard M30 heads with no problems, and the old kits from CarTech and the current kits from TCD use the standard 8mm exhaust studs.
After about 1988 the M30 head was changed somewhat, and the combustion chambers were enlarged. As long as your casting has a year earlier than 1988 and later than 1982, you are fine.
The M102 head can be fitted on an M106 by swapping the front cover and the distributor drive fitting on the front of the camshaft.
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Tony |
Edited by - Velocewest on Apr 21 2006 14:01:28 |
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beginner
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Posted - Apr 21 2006 : 23:40:44
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quote:
Originally posted by Velocewest
Ok the parts i have from my old cylinder head i can use.
The studs can be replaceable cool.
A question about the M102 , you wrote that i should replace the cover and the distributor drive fitting on the front of the camshaft.
Question
1.Should i use the cover and the distributor drive fitting on the front of the camshaft from my M106 cylinderhead or take it from another modell .
What fits.
Thanks a lot
Dimensionally there is nothing different about a Turbo head from a normal pre- 1988 M30 head. Same combustion chamber, same valve size, same intake and exhaust ports. As Afshin mentions, the exhaust valves are special, and the head has 10mm studs for the BMW exhaust manifold. Lots of people are running high-boost turbos on standard M30 heads with no problems, and the old kits from CarTech and the current kits from TCD use the standard 8mm exhaust studs.
After about 1988 the M30 head was changed somewhat, and the combustion chambers were enlarged. As long as your casting has a year earlier than 1988 and later than 1982, you are fine.
The M102 head can be fitted on an M106 by swapping the front cover and the distributor drive fitting on the front of the camshaft.
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HELP,PANIC
