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Discussion Starter #1
Anyone have any advice on running in the car, after getting new sport cams fitted? stay below 3,000 rpm? or vary the rev's in stop/start traffic to a limit of 4,500rpm??

would 1,000 miles be sufficient?

don't want this happening :sad3: new cams, engine gone

Thanks
Tin
 

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Lscman said:
New cams.......try to keep RPM above 1500 for a few days. This will result in better lubrication & avoid wiping a lobe.
thanks Lscman, would it be a good idea to vary the rev's between 1500-4000rpm's? or is this not a good idea? how about prolonged time at a certain rpm level, eg highway/motorway cruising around 70-80mph around 3500rpm?
 

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Tin said:
thanks Lscman, would it be a good idea to vary the rev's between 1500-4000rpm's? or is this not a good idea? how about prolonged time at a certain rpm level, eg highway/motorway cruising around 70-80mph around 3500rpm?
Sounds right. Constant RPM is not good (under a steady-state highway cruise control condition)...neither is extended idling under 1000 RPM or elevated RPM (over 4K). Break-in is quick...probably 1K mi or less.
Std non-roller cam followers are generally replaced too. I don't know if the motor has roller-type followers. Sorry, my cam lube experience is in pushrod motors and SOHC.
 

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Lscman said:
Sounds right. Constant RPM is not good (under a steady-state highway cruise control condition)...neither is extended idling under 1000 RPM or elevated RPM (over 4K). Break-in is quick...probably 1K mi or less.
Std non-roller cam followers are generally replaced too. I don't know if the motor has roller-type followers. Sorry, my cam lube experience is in pushrod motors and SOHC.

Agreed.

The only thing that I would add is that they are a hydraulic puck design…..meaning the lifter face rides directly on the lobe in much the same way as a push rod motor.

Have fun.

Shadowman
 

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Discussion Starter #6
thanks guys, the engine also had 32 new hydralic lifters fitted as these were sticking alittle, hence been all replaced along with new the camshafts.

Will be extra careful running her back to london. :wroom:

Tin
 

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It is always a good idea to install new cam followers when installing new cams. In fact, Dinan's installation instructions with its recently released S62 cam kit indicate that there will be no warranty coverage if new (BMW) hydraulic cam followers are NOT installed with the cams.

Regards, Dick Roberts
 
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