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E28 (1982 - 1988)

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  #1  
Old 12-03-2009, 11:51 AM
Teledyol Teledyol is offline
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Mein Auto: 98 540i 90 535i 84 528e
Cool Valve adjust for 84 528e - with 87 325i cam swap

I'm thinking that I have the M20B27 motor that the previous owner threw an 87 325i cam into. It was a "popular" swap since the newer cam was cheaper, more readily available and it made the 528e a bit more zippy.

However California Emissions inspectors turned up NOx numbers that were a bit too high.

The spec is to adjust .010 but I'm thinking that .013-5 might help to leave unburnt fuel in cylinder enough to improve the numbers.

Any thoughts?
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Old 12-08-2009, 09:33 AM
Teledyol Teledyol is offline
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Mein Auto: 98 540i 90 535i 84 528e
I just punked out, put a new cat on and passed.

In two years it will prolly need a new cat
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