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Discussion Starter #1 (Edited)
http://www.jegs.com/cgi-bin/ncommerce3/ProductDisplay?prrfnbr=1770&prmenbr=361

for those of you not familiar with these they slip between the block and spin-on oil filters, they don,t work on all sizes of oil filters, and they are not designed to replace frequent oil filter changes or allow longer times between oil changes
keep in mind the MAIN PURPOSE of pre-screens is to allow you a easy look at a SAMPLE OF the metalic, gasket,silicone and plasic crud that the oil system is pushing thru your engine,they are not designed to be filters,they do not trap 100% of the crud,(neither does your oil filter for that matter, they, the pre-screens, are designed to allow you to spot bearing or cam lobe wear quickly, but they only work if you take the time to INSPECT them frequently by spinning off the fillter and inspecting them, the average oil filter has between 200 and 450 sq inches of filter area, thes pre-screen have less than 10 sq inches of filtering area,so they are easily at least partly blocked with crud and can and do restrict oil flow if you NEGLECT to inspect and clean them FREQUENTLY we used them all the time on race engines that we worked on every week , and in that application they are a great help in catching problems before they become major, but if your like most guys and only take the oil filter off durring 3000 mile oil changes THEY ARE A BAD IDEA for THAT APPLICATION
BTW most guys running race engines DON,T USE THEM as the ONLY source of info on engine condition MOST guys also cut open and inspect the oil filters themselfs to look for bearing material and signs of engine wear
now Ive said this before, you also should have installed the good magnets in your engines oil pan, simply because they can trap and hold most of the metallic dust that a failing cam and lifter generates from getting constantly pushed back into your engine to cause further damage


http://www.wondermagnets.com/cgi-bin/edatcat/WMSstore.pl?user_action=detail&catalogno=0001
 

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Oil Pan plug

Wouldn't a magnetic oil pan drian plug work just as well????:cheers: :rolling:

Louisiana Cajun

Remember Squirrel season opens this week-end:nuts:
 

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for daily cruisers I like the Amsoil bypass filter system, and an extra $15 for them to test and analyze a sample of oil. A visual inspection will not be of much service to the daily driver. Anyone?
 

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Discussion Starter #6 (Edited)
"Wouldn't a magnetic oil pan drian plug work just as well????"

comparing an auto-parts store magnetic drain plug, to those magnets in the post above is about like comparing a BB gun to 378 Weatherby Magnum, one of those magnets can pick up a small block cylinder head, installing a 4 of them into the sump of your oil pan will prevent metalic dust from entering the oil pump, all the auto-parts store magnetic drain plug will do for you is prove to you the magnet can pick out a small percentage of the metallic dust that your oil is pushing through the engine
 

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I gave up on regular filters, if you want an easy system to inspect the oil for particles get this:


It's a tall style System 1 oil filter, you can unscrew the cap and take out the filter screens inside, inspect them (maybe clean) and then put it back together. No more wrestling with slipping oil filter wrenches or pinching the cases.
 
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