Copper in the Oil Analysis

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11-11-2010 | 04:43 AM

#11

Philm

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From: Delaware

Brass distributor gear?

11-11-2010 | 07:45 AM

#12

4bus

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From: Oneida Lake NY

Quote:

Originally Posted by Philm

Brass distributor gear?

Pretty sure the 496 is a distributorless ignition with coil on plug

11-11-2010 | 08:06 AM

#13

Rage

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From: Missouri

When I make hard runs I trim the drive out under load to gain bow lift at WOT. Could that be over loading the thrust bearing? The coupler is heavily lubed with the Merc specified lube.

11-11-2010 | 08:12 AM

#14

Ted G

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From: Edgerock Baby!!

Quote:

Originally Posted by Rage

When I make hard runs I trim the drive out under load to gain bow lift at WOT. Could that be over loading the thrust bearing? The coupler is heavily lubed with the Merc specified lube.

No, but if there is too much grease in the coupler packed in at the front it can overload the thrust bearing.

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11-11-2010 | 12:51 PM

#15

Rage

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From: Missouri

Quote:

Originally Posted by 4bus

Pretty sure the 496 is a distributorless ignition with coil on plug

Yes mine is an EFI set up. Thanks for the thought though.

11-11-2010 | 03:18 PM

#16

DesertRage

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From: SL,UT

Rage, Check to make sure your engine mounts are still tight. I have seen the 3/4" nut back off on the pedestal mounts. This would let the engine torque up and put pressure on the rear main thrust bearing. Just a thought... The ones I have seen were the port side.

11-11-2010 | 05:03 PM

#17

Rage

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From: Missouri

Quote:

Originally Posted by DesertRage

Hey Jon, thanks for the suggestion! I need all the help I can get.

11-12-2010 | 03:23 AM

#18

mike11

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From: Northeast Pa

valve spring shims....

11-12-2010 | 08:06 AM

#19

Rage

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From: Missouri

Quote:

Originally Posted by mike11

valve spring shims....

Yes, I have the copper flash coated shims but they have hundreds of hours on them and the copper was mostly gone before this spike in copper in the oil occured. Thanks for the input.