grumpyvette Posted September 28, 2003 Share Posted September 28, 2003 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 furthe damage http://www.wondermagnets.com/cgi-bin/edatcat/WMSstore.pl?user_action=detail&catalogno=0001 Quote Link to comment Share on other sites More sharing options...
CruxGNZ Posted September 28, 2003 Share Posted September 28, 2003 ...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 I saw these before and didn't think much of them thinking that they don't have much surface area, and if they get clogged up with crap, well... I just saw TRUCKS! on TNN or sorry Spike TV, and he was saying how good an idea these were to see what's going through your oil filter without having to cut it open, but he never mentioned the above quote. Listen to what grumpy says! !M! Quote Link to comment Share on other sites More sharing options...
Guest Psilocybian Posted September 28, 2003 Share Posted September 28, 2003 Question about the magnets, any particular spot in the oil pan they should be placed? How many to use? Thanks. Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 29, 2003 Author Share Posted September 29, 2003 just some info, just one of those magnets can lift a sbc cylinder head, and yes they work exceptionally well at trapping metalic dust I normally place (4) one in each corner of the oil pans sump to prevent metalic dust from reaching the oil pump pick-up once you get them and install them youll see how much crud they prevent from reaching your bearings the next time you pull the oil pan, and never forget to use them in future engine rebuilds. BTW the site mentions that they can loose strength if heated over 250 degrees, don,t worry about it, the magnets stay well under 250 degrees even if the oil gets close to 250 degrees, because they are in firm contact with the oil pans lower inside surface and that lower outside surface outer surface is in direct contact with the outside cooler air, in the many years Ive used them they have NEVER showed any tendency to lose strength, if your worried about it just J&B weld them to the outside surface of the oil pan sump, they will work almost as well that way http://www.wondermagnets.com/cgi-bin/edatcat/WMSstore.pl?user_action=detail&catalogno=0001 Quote Link to comment Share on other sites More sharing options...
Guest Psilocybian Posted September 29, 2003 Share Posted September 29, 2003 thanksya Quote Link to comment Share on other sites More sharing options...
baddriver Posted September 30, 2003 Share Posted September 30, 2003 So for my 3000 mile street car oil changes, am I better off just cutting open the filter? Or would I really rather not know? BTW, I have a great source for high-powered magnets out of computer hard drives. They are incredible magnets and I can get them for under $1 each. Would they be good for this application? Or am I just trying to be ridiculously cheap? Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 30, 2003 Author Share Posted September 30, 2003 baddriver Those computer magnets make excellent engine magnets and if you can get them cheaply grab all you can and no you're not trying to be cheap, you're trying to use what you have available to you, and that's one important hot rodding skill Nowas far as the oil screen goes, they are designed to be used at the track to check the engine condition they are not designed for streetcars they tend to clog up over time I would definitely not run one on the street but it is a good thing to have on your filter when you're at the track you can spin off the filter and check for any emminant problems, I would remove it before leaving the track if it's you were only transportation it might help if you looked at it as a fuse that tells you when something is about to go wrong Quote Link to comment Share on other sites More sharing options...
Tim240z Posted September 30, 2003 Share Posted September 30, 2003 just some info, just one of those magnets can lift a sbc cylinder head, and yes they work exceptionally well at trapping metalic dust 8) 8) 8) ...is that for real!!?? Tim Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 30, 2003 Author Share Posted September 30, 2003 http://www.wondermagnets.com/cgi-bin/edatcat/WMSstore.pl?user_action=detail&catalogno=0001 if you don,t believe me spend $12 , buy 2 and find out! (just don,t get your finger between them or they will instantly prove to you that being dumb HURTS!) Quote Link to comment Share on other sites More sharing options...
blueovalz Posted October 1, 2003 Share Posted October 1, 2003 You want to be careful handling this magnets. I had two dogbone magnets from a hard drive and they got together around my fingertip and snapped together causing a major blood blister. Very strong magnets here. Quote Link to comment Share on other sites More sharing options...
Guest Perry Posted October 1, 2003 Share Posted October 1, 2003 they sell those magnets for traction magnets on the little slot car tracks. The hobby shop I worked in had a demo track occasionally and built some spec'd out slot cars for it with best magnets, motors, tires, etc... run on a track with pulse modulated current control and BIG transformers. We had to pry the cars off the metal strips on the glass counter with a plastic tool. It was quickly discovered that you couldn't use tools around them without a car stuck to your screw drivers etc.. and when the cars did sling off the track they were often found stuck to metal objects at great distances from the track. There are probably still several of those cars stuck somewhere in that hobby shop that we never found. I was never into slot cars, but these were very impressive. I just never could figure out why you'd want a $100 slot car that you can't see running cause it's too fast to keep track of and at any moment may fling off the track like a little bullet and you won't even realize it's gone till you hear it attach itself somewhere you may never find. Don't even get me started on the slot car drag racers hooking banks of 24V truck batteries to the track.... Perry Quote Link to comment Share on other sites More sharing options...
Owen Posted October 1, 2003 Share Posted October 1, 2003 Magnetic engine hoist!! Or better yet, magnetic CAR hoist!! Who needs a hydraulic lift? Just make sure those overhead beams are sturdy enough... Owen Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted October 1, 2003 Author Share Posted October 1, 2003 http://www.wondermagnets.com/cgi-bin/edatcat/WMSstore.pl?user_action=detail&catalogno=0001 everyone , reading this should buy 4 of those #1 magnets and install them in their engines oil pan,run the engine for a few months , pull the oil pan and then tell me what you find,If you wan,t Ill save you some time, youll find a larger collection of metallic dust than you would ever want embedded in the engines bearings , stuck to those magnets, and youll find the bearings looking far better than they ever looked before! Quote Link to comment Share on other sites More sharing options...
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