300 I6 question

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Aug 7, 2000 | 11:33 PM

lurch

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Senior User

Joined: Aug 2000

Posts: 116

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From: Baldwin, ND

300 I6 question

I have an 83 bronco with a 300 and I qo through about a quart of oil a week from the rear engine seal. Just wondering how big of a job it is to change-do I need to drop the tranny off or can I get it in without any major work. thanks for the help.

Justin
1972 Ranger 360
1975 F100 Custom 4x4 302
1976 F150 351W
1976 F150 390
1982 F150 XLT Lariat 4x4 351W
1983 Bronco XLT 4x4 300

Aug 20, 2000 | 11:17 AM

Bogn

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From: Eveleth, MN

300 I6 question

You have to pull the tranny and flexplate/flywheel. the Seal is a one piece and you don't have to take the oil pan off so that is a plus. you should be able to get the job done in about 3-5 hours...... did it in 90 minutes at the tech school autoshop with access to all the "neat" tools and truck lift/tranny jack

83' Ford Bronco, 6" of lift, 35x12.5x15" thornbirds, and a 230HP I6
84' Ford Bronco 2" DROPPED custom 2X4, Soon to be 460/500hp.

Aug 20, 2000 | 03:05 PM

Eddie

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Joined: Nov 1999

Posts: 780

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300 I6 question

Thanx for the info; I have the same icky job coming up when I change trannies next fall.
Are any of these "neat" tools special to the rear main seal changeout?
If so, what are they?
Eddie

Aug 21, 2000 | 06:56 AM

Bogn

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Joined: Jun 1999

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From: Eveleth, MN

300 I6 question

nope. tht seal is just a plain old normal lip seal, you just have to be careful when you install the new one so it doesn't rip.....

83' Ford Bronco, 6" of lift, 35x12.5x15" thornbirds, and a 230HP I6
84' Ford Bronco 2" DROPPED custom 2X4, Soon to be 460/500hp.

Aug 21, 2000 | 01:15 PM

insect2

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Joined: Aug 1999

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300 I6 question

I had a similar problem on a mitsubishi pick up. Go to the auto parts store and ask for something you put in the crankcase to "swell" the rear seal. This works after a week or two. It worked for me. Its worth a try, and if it dosent all you have lost is a couple of bucks.

Let me know.

Aug 22, 2000 | 09:38 PM

lurch

Thread Starter

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Joined: Aug 2000

Posts: 116

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From: Baldwin, ND

300 I6 question

K. Thanks for all the help. Soon as I got my other truck up and going, then I'll have time to let it sit while I work on it.

Justin
1972 Ranger 360
1975 F100 Custom 4x4 360
1976 F150 390
1978 F150 351W
1982 F150 XLT Lariat 4x4 351W
1983 Bronco XLT 4x4 300

Aug 28, 2000 | 11:31 PM

toolmnmike

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Joined: Aug 2000

Posts: 21

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300 I6 question

Also, remember to check the part of the crank that the seal rides on. Excessive leakage and miles can lead to wear of the crank where the seal rides... any groove at all and you will no doubt be doing the job again! I believe NAPA sells a slip on collar to fix that problem.

Mike
'67 F-100.. 625,000 miles.. 300 six.. 3 rebuilds