69 red fastback 20 Report post Posted March 29, 2016 Just wanting to know if it's possible to change the rear main without pulling the motor, I'm hoping one of the experts on here have done it and can tell me if there are any tricks to doing it without pulling the motor. Thanks in advance Quote Share this post Link to post Share on other sites
ray1970 88 Report post Posted March 30, 2016 You didn't say what you have for a motor? Has the motor been redone before? Rope seal? rubber seal? As long as its not a rope seal with a pin holding it in on the block side...Not a problem.. Its still its not a fun or clean job and if the motor has never been apart before...Double the FUN.. Quote Share this post Link to post Share on other sites
69 red fastback 20 Report post Posted March 30, 2016 Sorry, I forgot to mention that it's a 302 bored to 306, yes I rebuilt it about 6 years ago while I was redoing my 69. It is the rubber seal Quote Share this post Link to post Share on other sites
ray1970 88 Report post Posted March 30, 2016 Dont know about a 302 but i had to redo the rear main seal on my 351C shortly after the install.. 1.Remove cross member 2.Remove oil pan. 3.Get covered with oil. 4.Remove main caps(All) 5.BE happy to see bearings are still good.. 6.Push(spin) seal out with special tool NO.321AB& (bent coat hanger) 7.Install new seal... Hoping it dosent get hang up half way threw and mal the rubber.... 8.Wonder if you put the seal in the right way????? 9.Go get more beer. 10.Clean up all parts and reinstall. 11.Tell every body how easy it really was... 12.Tell your wife what a living hell you just went threw... 13.After all this find out it was the oil presser line on the back of the block leaking.. ENJOY.. 1 Mach1 Driver reacted to this Quote Share this post Link to post Share on other sites
barnett468 418 Report post Posted March 30, 2016 you may have to undo the two bolts on the right frane rail that hold the idler arm on then pull down on the arm to make clearance between it and the pan. remove the dip stick. if you have a pin it will be in the main cap not the block, and will be the cause of a leak. push on one end of the seal in the block until around 1/4" comes out the opposite side. grab that end with pliers etc then rotate it around the crank journal . do NOT pull it away from the journal untl you rotate it all the way out. put heavy oil like 50wt or engine assembly/cam break in oil all over the new seal and crank jurnal before installing it in the block. place it onto the crank journal then put light pressure on it to compress it slightly then carefully rotate it into the block. maintain pressure on the end that is going into the block. leave around 3/16" of the seal exposed. install other half of seal into main bearing cap leaving 3/16" of the seal exposed on the oppose end. install main cap. . 1 Mach1 Driver reacted to this Quote Share this post Link to post Share on other sites
69 red fastback 20 Report post Posted March 30, 2016 Thanks guys for the responses, that sounds alot better then pulling the motor Quote Share this post Link to post Share on other sites
