End play?
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Junior User
Joined: Jun 2006
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End play?
Hi guys,
Got an 88 150 4x4, 4.9. I have the tranny and drivetrain off. took the fly wheel in to be turned and the guy noticed some scrape marks on the front of it. He told me repeatedly to check my bearings and that there can be no end play. I'm assuming he's talking about the main bearings on the crank. I'm also assuming that you can get to that by dropping the oil pan (which is the next project --- bad seal).
My question is what is the best way to test this? I'm guessing it would take quite a bit of pressure to move anything even if it was bad. Before I took the truck off the road I noticed it would drop a tablespoon of oil when I parked it. Don't think it was leaking while driving... no smell and no considerable difference on the dipstick. Thought it was the rear seal but after getting it apart and looking at it I think it's the pan seal around the crank.
Any advice, pointers, etc. is greatly appreciated.
Thanks
Got an 88 150 4x4, 4.9. I have the tranny and drivetrain off. took the fly wheel in to be turned and the guy noticed some scrape marks on the front of it. He told me repeatedly to check my bearings and that there can be no end play. I'm assuming he's talking about the main bearings on the crank. I'm also assuming that you can get to that by dropping the oil pan (which is the next project --- bad seal).
My question is what is the best way to test this? I'm guessing it would take quite a bit of pressure to move anything even if it was bad. Before I took the truck off the road I noticed it would drop a tablespoon of oil when I parked it. Don't think it was leaking while driving... no smell and no considerable difference on the dipstick. Thought it was the rear seal but after getting it apart and looking at it I think it's the pan seal around the crank.
Any advice, pointers, etc. is greatly appreciated.
Thanks
Fleet Owner
Joined: Sep 2005
Posts: 28,609
Likes: 18
From: Lake Tahoe, Nevada
First thing I would do would be to determine exactly what the flywheel was coming in contact with. You should be able to do that with visually. If it is a fixed part of the block, then yes, check the endplay of the crank. But maybe something was out of place causing the scraping. (?)
There is always some endplay. The main bearing that controls the thrust is the fifth one back from the front. You can just pry the crank for and aft with a screwdriver to check the end play. Measure it with a feeler gauge. .004" to .008" is the spec for my 86. If you have a book for your year, take a look to see if it's the same.
There is always some endplay. The main bearing that controls the thrust is the fifth one back from the front. You can just pry the crank for and aft with a screwdriver to check the end play. Measure it with a feeler gauge. .004" to .008" is the spec for my 86. If you have a book for your year, take a look to see if it's the same.
Thread Starter
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Junior User
Joined: Jun 2006
Posts: 60
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Thanks bdox. Unfortunately I'm out of town until next week. Just stewin' to work on the thing but can't. I have not had a chance to visual the thing yet but, will. Didn't know there were specs for that-will check.
Think I should change the rear seal since I'm there or it ain't broke don't fix it?
Think I should change the rear seal since I'm there or it ain't broke don't fix it?
