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Author Topic:   Flakes on pre-filter screen
Dirt Maniac

Total posts: 145
posted June 09, 2005 01:43 PM  
Every so often, we will find small metal flakes on the prefilter screen on top of the oil filter. Sometimes we check, no metal flakes. Other times, metal flakes. Nothing seems to be getting into the oil pan. We check the screen after each night and change oil every two nights.
Originally, we noticed small chips on the rocker arms b/c the springs were just nicking them. We replaced rocker arms with top of the line that can clearance big springs (roller). We haven't noticed any other nicking going on, but lately have found metal flakes in the oil again. But then we don't, and then we do.

Are we missing something? Oil pressure still remains great. This is a high compression and high revving 358 with all good internals and billet caps.

Dirt Maniac

Total posts: 136
posted June 09, 2005 05:47 PM  
Those little flakes are just like sand,they get in places that you didn't even know you had,then they suddenly appear.Have you determined what they are ie.steel, brass,aluminum,or what? If they are they"re just hiding somewhere and then suddenly appearing,If not then you should be pulling the pan and checking bearings etc.

Dirt Maniac

Total posts: 145
posted June 09, 2005 06:03 PM  
They are shiny steel.

Dirt Maniac

Total posts: 116
posted June 09, 2005 07:49 PM  
check over your valve train closely. Pull your rocker arms off and check the tips of your valves. I had some valves start shedding a chrome like substance off the tips once. Also check your valve springs and rocker arms in the pivot area.

One more thing to check is your distrabutor drive gear (if it isnt bronze)

Dirt Freak

Total posts: 209
posted June 10, 2005 03:16 AM  
something else to check, that we have found if your running a standard production block.
check that the cam bore is exactly parallel to the crank and exactly 90 degs to the lifter bores. we have seen a cam run slightly (like only 0.001-0.003") down hill (front to back) causing the roller lifters to run predominantly on one edge of the cam lobes, causing excessive wear on the edge of the lobes and on the edge of the lifter trunnions. and we would find small amounts of material in the o-berg screen.

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