Lifter install direction??
11-20-2002, 05:41 PM
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Lifter install direction?? Hey i gotta Question about the direct the lifters should go in the engine.Theres some large holes in the bottom of each lifter bore im jsut wondering if the hole in the lifter it self is supposed to face that large hole in the lifter bore or opposite of it any insite on this would be most appreciated.
11-20-2002, 05:45 PM
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Re: Lifter install direction?? if it makes any diff the car is a O1 SS i dont know if the year of the engine its self would makea diff or im jsut in the middle of a cam install and gotthe heads off for porting and springs and replacing lifters while im this far into it
11-20-2002, 10:51 PM
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Re: Lifter install direction?? As a rule of thumb, I always mark parts when I dissassemble an engine and install the same parts in the same location facing the same way. Metal parts "wear" into one another seating them into position. I'm not talking only old school flat tappet lifters here, this applies to LS1's also but not for the same reasons. Flat tappets wear in to the cam to seat. Roller lifters do not rotate in the bores like flat tappets do and thus seats the lifter into the lifter bore. I'm a stickler for details, this is just the way I was trained to build engines in school with GM.
Will it hurt to turn a lifter around 180* in a lifter bore on a LS1, no it wont. Will it hurt to move a lifter from one position to another, probably not. But its attention to detail that goes a long way building a reliable engine. The lifters on a LS1 are cut in such a way that oil will travel around the recess in the lifter to the oil hole no matter what the position. I'm trying to remember that I think I saw a document that GM put out saying when you install new lifters, try to orient the hole in the lifter to the oil passage in the block. I can't find anything in the service manual and TSB's tonight. I'd say if you didn't mark the position when you took them out, orient them to the oil passages in the block, that way they can pump up a fraction of a second quicker and will be less affected by varnish buildup afer you get some miles on that engine. Hope I've helped you out some. <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" />
Jay
<small>[ November 20, 2002, 10:53 PM: Message edited by: JAY4SPEED ]</small>
Will it hurt to turn a lifter around 180* in a lifter bore on a LS1, no it wont. Will it hurt to move a lifter from one position to another, probably not. But its attention to detail that goes a long way building a reliable engine. The lifters on a LS1 are cut in such a way that oil will travel around the recess in the lifter to the oil hole no matter what the position. I'm trying to remember that I think I saw a document that GM put out saying when you install new lifters, try to orient the hole in the lifter to the oil passage in the block. I can't find anything in the service manual and TSB's tonight. I'd say if you didn't mark the position when you took them out, orient them to the oil passages in the block, that way they can pump up a fraction of a second quicker and will be less affected by varnish buildup afer you get some miles on that engine. Hope I've helped you out some. <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" />
Jay
<small>[ November 20, 2002, 10:53 PM: Message edited by: JAY4SPEED ]</small>
