258 Rear Main Seal Replacement

fmlewis · 09-07-2010, 01:05 AM

I am attempting to replace my rear main seal on my 258. It is a 2 piece design and the upper half is in the block. Any ideas on how to remove the upper half of the seal from the block?

I am contemplating just replacing the lower half and leaving the upper alone for now. Any ideas would be greatly appreciated.

Thanks,
Frank

carwash · 09-07-2010, 01:11 AM

It should push right thru. push up on the one side, and it should slide right out the other.

fmlewis · 09-07-2010, 07:02 AM

Do I need to loosen all of the bearing caps? I have tried pushing on it but am a little concerned to push too hard in fear of scratching or marring the bearing surface. Is it okay to spray some penetrating oil on it?

KargoMaster · 09-07-2010, 09:37 AM

I would NOT loosen bearing caps, I can't see more lubrication being bad.

Probably just stuck... you'll get it.

carwash · 09-07-2010, 12:00 PM

It will come out, yer doing it right. just push it thru. that's why it's made as two pieces... More lube can't hurt. Do not loosen the bearing cap.

fmlewis · 09-07-2010, 11:48 PM

Got it out finally. Took a little penetrating oil and patience but its out now. Now I just to need to try and clean or get my hands on a new oil pump screen. Mine appears to be a little gunked up.

Thx for the info. I can always count on you guys to help.

09-07-2010, 01:05 AM	#1
fmlewis The best damn Engineer!!! Join Date: Aug 2008 Location: Fairfield Posts: 135	258 Rear Main Seal Replacement I am attempting to replace my rear main seal on my 258. It is a 2 piece design and the upper half is in the block. Any ideas on how to remove the upper half of the seal from the block? I am contemplating just replacing the lower half and leaving the upper alone for now. Any ideas would be greatly appreciated. Thanks, Frank

09-07-2010, 01:11 AM	#2
carwash pimpin' IS easy Join Date: Jan 2007 Location: Union, KY Posts: 3,344 Images: 605	It should push right thru. push up on the one side, and it should slide right out the other. __________________

09-07-2010, 09:37 AM	#4
KargoMaster Cleaning off the rust... Join Date: Jan 2007 Location: Cincinnati, OH Posts: 1,009	I would NOT loosen bearing caps, I can't see more lubrication being bad. Probably just stuck... you'll get it. __________________ brad 5.0L \| 435 \| 203 \| 300 \| 4.10 \| 39.5 Buildup BACK underway...

09-07-2010, 12:00 PM	#5
carwash pimpin' IS easy Join Date: Jan 2007 Location: Union, KY Posts: 3,344 Images: 605	It will come out, yer doing it right. just push it thru. that's why it's made as two pieces... More lube can't hurt. Do not loosen the bearing cap. __________________

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09-07-2010, 07:02 AM	#3
fmlewis The best damn Engineer!!! Join Date: Aug 2008 Location: Fairfield Posts: 135	Do I need to loosen all of the bearing caps? I have tried pushing on it but am a little concerned to push too hard in fear of scratching or marring the bearing surface. Is it okay to spray some penetrating oil on it?

09-07-2010, 11:48 PM	#6
fmlewis The best damn Engineer!!! Join Date: Aug 2008 Location: Fairfield Posts: 135	Got it out finally. Took a little penetrating oil and patience but its out now. Now I just to need to try and clean or get my hands on a new oil pump screen. Mine appears to be a little gunked up. Thx for the info. I can always count on you guys to help.