going to do head swap for the first time! any pointers??
.... seriously
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Joined: Jul 2001
Posts: 626
From: memphis tennessee usa
Re: going to do head swap for the first time! any pointers??
please explain. how does a head swap lead to spun bearings i dont understand if u follow all the right steps?
Originally Posted by runninfromthelaw
I have read that alot of head swaps lead to spun bearings.I have also had this happen to me.A few thousand miles later and boom it happens no signs.I think they said its from the two different metals pressure and when you remove the heads it releaves the pressure on the block causing the bearings to spin in time.Just a warning 
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Joined: Oct 1998
Posts: 3,144
From: Jackstandican
Re: going to do head swap for the first time! any pointers??
Originally Posted by simple
spun bearing? you're kidding right? 
its not like you're going at it with an Axe
i guess my motor is an exception then??
did it too mine and i have NO intake leaks and have yet too spin a bearing in over 8,000 miles now
its not like you're going at it with an Axei guess my motor is an exception then??
did it too mine and i have NO intake leaks and have yet too spin a bearing in over 8,000 miles now
I can see where it would be okay to dimple the block debris wise, but there are those who go crazy and take a dremel to the block surface with flying metal particles going everywhere.
The point I am trying to make is it's completely unessecary to alter the surface at all. The secret is a clean surface, consistent beed, place manifold straight down, torque bolts in sequence, retorque bolts after a few heat cycles and you will have no leaking problems.
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Joined: Apr 2001
Posts: 2,195
From: Springfield, IL
Re: going to do head swap for the first time! any pointers??
yeah, i am aware of alot of those threads and mishaps...and i am sure there is a few dozen reasons as too why those motors did what they did after the install
but thats also why i said score the block or dimple it, not gouge the hell out of or chop it up with a mechanical tool
meaning a razor blade or a scratch awl/punch (you dont have too do this either tho) i thought it was a good idea when i did mine especially when small intake leaks can be a major PITA and its working good so far
cleanliness is probably thee most important part of doing this task!!
but thats also why i said score the block or dimple it, not gouge the hell out of or chop it up with a mechanical tool
meaning a razor blade or a scratch awl/punch (you dont have too do this either tho) i thought it was a good idea when i did mine especially when small intake leaks can be a major PITA and its working good so far
cleanliness is probably thee most important part of doing this task!!
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Joined: Feb 2002
Posts: 134
From: Alamogordo,NM,US
Re: going to do head swap for the first time! any pointers??
Just a warning most lt1s that have got mileage on them and have had heads done even going by the book still spin bearings.If you want to chance it go for it buy a manual and good for it.I'm just trying to warn you of what might happen.
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Joined: Oct 1998
Posts: 3,144
From: Jackstandican
Re: going to do head swap for the first time! any pointers??
Originally Posted by wrd1972
What do you guys mean by spinning a bearing, please explain this and what reall constitutes a high miliage LT1.
The way spun bearings happen is if foreign particles of any kind gets into the engine whilst being open to the elements those particles can reach the bearings and do damage. The simplest way to avoid any kind of problems like this is to cover the oil valley and/or the front of the oil pan (WITH CLEAN SHOP RAGS!!!) when it is exposed. After the engine is buttoned up it is a good idea to change the oil AND filter.
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