302 Rear Main Leak

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   To: boat dr

Thanks for providing you input to me and to answer your question I reused the old original crank. It's in perfect shape with the knurling in the right direction and uses a two piece $70 seal. I will follow your recommendation with the use of the GM RTV.

d*ck

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rebenj Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: June-25-2006 Location: United States Status: Offline Points: 5	Post Options Post Reply Quote rebenj Report Post Thanks(0) Quote Reply Topic: 302 Rear Main Leak Posted: October-05-2006 at 7:23am
	To: boat dr Thanks for providing you input to me and to answer your question I reused the old original crank. It's in perfect shape with the knurling in the right direction and uses a two piece $70 seal. I will follow your recommendation with the use of the GM RTV. d*ck
	ri78tique

rebenj Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: June-25-2006 Location: United States Status: Offline Points: 5	Post Options Post Reply Quote rebenj Report Post Thanks(0) Quote Reply Posted: October-05-2006 at 7:08am
	To JoeinNY; Thanks for the response and help. What you recommended is exactly what we were going to probably do. Again thanks for you help. d*ck
	ri78tique

Tim D Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: August-23-2004 Location: United States Status: Offline Points: 2641	Post Options Post Reply Quote Tim D Report Post Thanks(0) Quote Reply Posted: October-03-2006 at 9:03pm
	I've bought the 2 piece marine seal, it had the same Ford number on it a $14 auto seal had. A 2 piece seal uses a crank with directional wick lines, which is in the photo below, a RH crank. The smooth crank uses a one piece seal and the seal has the grooves. I think Ford started one piece seal cranks around 1980.
	Tim D

boat dr Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245	Post Options Post Reply Quote boat dr Report Post Thanks(0) Quote Reply Posted: October-03-2006 at 7:49pm
	Rebenj, you say minor oil leak from the rewar main at the parting lines.stupid question,did they reuse the old crank? if yes go to question #2 Is the crank reverse rotation,the only difference is the direction of the knurling at the rear journal,this pulls the oil away from the seal.wrong crank and there is not a seal that will stop it,oil gets fed to the seal rather that away. if it is indeed at the pan try this ,good clean bead at fore and aft pan hump,GM (mr. goodwrench) brand RTV,set pan and install pan bolts,then allow 30 min. for the stuff to go off. wait overnite and tighten to specs........this is how i do it.....boat dr
	boat dr 1949 Dart 1964 American Skier

JoeinNY Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: October-19-2005 Location: United States Status: Offline Points: 5698	Post Options Post Reply Quote JoeinNY Report Post Thanks(0) Quote Reply Posted: October-03-2006 at 2:36pm
	Absolutely stagger the joint away from the parting line of the engine and pan and apply a dab of rtv at each joint of the seal and at the parting line of the block at pan where they meet the seal. Also be careful on the torque proceedure with the pan use a good torque wrench, follow the manual and then after the rtv is well dry give it another retorque, then after a warming cooling cycle or two give them another re torque. Good luck
	1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" Holeshot Video

rebenj Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: June-25-2006 Location: United States Status: Offline Points: 5	Post Options Post Reply Quote rebenj Report Post Thanks(0) Quote Reply Posted: October-03-2006 at 1:47pm
	I have a 1978 Commander Ford 302 reverse rotation engine in my Ski Tique. The motor was rebuilt 2 years ago and has had a minor oil leak from the rear main from both parting lines since. I used to correct Fel Pro seal P/N 17746. Changed the seal again after a year and still had the same problem. Motors out and I am ready to change it again but this time I have a Ford seal from SKIDIM. Talked to various Marine Engine rebuilders and some say to offset the seal and some don't. Should it be offset or not?? Any other suggestions to offer would be appreciated. The crank end is mint, no groove ect. Regards d*ck

302 Rear Main Leak

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