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Wanted to share this with the forum. I just placed the order so we shall see if it turns out as good as I'm hoping for. The bearings in my 3 speed manual tranny were as follows: pp# MRC207 SFG (main pinion drive bearing shielded one side),##note##thxs to DB4YA I knew the shielding on one side was important and has to be there. pp#MRC207 S (main shaft front bearing) pp#MRC206 S (main shaft rear bearing) My understanding is that the main pinion drive bearing is typically the one that will go bad 1st, and sure enough when I checked these (as instructed by PlymouthyAdams) it was the one of the three that was noisy. Wasn't finding much on the MRC part number, however did find where it had been previously discussed here on the forum once before, and DB4Ya had helped another member cross the original Mopar part number (619167), over to a Federal Mogul p# of 1207SL....I thinking like other company's and in respect to the economy, they can sell off/ merge/ etc...seems like business as usual these days, anyway - the best luck I was having on the 1207SL part number was under Timken. The bearing looked correct by description, so I'm thinking Federal Mogul and Timken may all be the same now,.. lastly here, I'm a newbie, that's learning,..but even I can understand the importance of quality in respect to bearings,...and Timken is a name I've seen since I was young..however today when I discovered that MRC is a division of SKF,and that they were USA made, I purchased a full replacement set (all 3 bearings) MRC207SFG, MRC207S and MRC206S, for a total of $42.00 + $13.00 (4 day shipping) = $55.00 to my door from locate ballbearings.com. According to the Fella I spoke with (Mark Hoffman, see the info below), by ordering through him, I cut out the middleman....he told me he stocked and sold quite a few of the bearings I purchased, that he recognized the numbers, etc...course, only he and the man upstairs know if that's actually true or not. Typically I've learned, " if it seems to good to be true, it probably is - too good to be true ", so I was/still am a bit skeptical, but I needed to make a decision and pulled the trigger and ordered from them....so well see, I suppose. Just wanted to share this info with the group, as the prices I was getting on a Timken 1207SL bearing were ranging from around $70 + shipping and upwards towards a $ Benjamin. I'll follow up with this, once they are received, etc.. Mark HoffmanLocate Ball Bearingswww.email@example.com St. Charles Place, Suite BPalm Desert CA 92211 Steve
I'm doing a total rebuild of my 218 engine. The engine is completely disassembled except for the cam bearings. Before I remove them, I thought it would be a good idea to measure both the existing cam shaft journals and cam bearing inside diameters to see what the clearances are. (The #4 bearing is cast into the block and is not replaceable so I'm not including it in the discussion.) I found some things that surprised me: Q1. The #1 and #3 bearing and journal sizes were different by a whopping .064 (not .0064). Shouldn't the #1, #2, and #3 bearings and journals be almost identical in size? Q2. Measuring bearing inside diameters is not easy. I used an inexpensive Chinese telescoping gauge along with a top notch Starett micrometer for the measurements, but getting consistent readings using telescoping gauges was hard to do. Using the telescoping gauge, consecutive readings of the same bearing often differed by anywhere from zero to .002 or even .003. What's the best method of measuring cam bearing diameters? Has anyone else had trouble with making these measurements. Q3: How can I order the correct size replacement bearings when I have these crazy differences in sizes between the three bearings and journals? Should I just replace the cam and all the bearings in order to obtain consistent sizes and clearances among the three?