Ls4 Info?
Thread Starter
Staging Lane
Joined: Jan 2004
Posts: 51
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From: Sterling Heights, MI
Ls4 Info? GM is putting the 5.3L V-8 in the Grand Prix and Bonneville (303 HP). Does anyone have any info on the block and if it's any different (for FWD type mounts) or if there are any issues installing the shorter crank in an LS1?
Looking to run a transverse engine with the 4T65HD.
Looking to run a transverse engine with the 4T65HD.
Launching!
Joined: Dec 2005
Posts: 214
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From: Brandon, MS
Copied this from a thread over at LS4wbody.com
Here is a link to the thread. Some of the information is LS4 specific, but what I copied is the info dealing with crank length etc. The block is essentially the same as any Gen IV engine. Also the starter is mounted on the tranmission instead of the block.
http://www.ls4wbody.com/forum/index.php?showtopic=14
PS: Curious... what you planning to put together?
The 5300 V-8 shares a common architecture with these other versions, including a deep-skirt block, six-bolt cross-bolted main bearing caps, and structural oil pan, but is modified to accommodate the “east-west” mounting position of the Grand Prix’s front-wheel-drive chassis.
To fit the “sideways” positioning in the Grand Prix, several changes were made to shorten the engine’s overall length. The crankshaft was shortened by 13 mm – 3 mm at the rear and 10 mm at the front – and the entire accessory drive system was designed to reduce space. The water pump and all other accessories, including the power steering pump, are driven on a single-belt drive system – the longest drive system in a GM vehicle.
Engineers devised an elongated water pump manifold, which features a remote-mounted pump that feeds the stock Gen IV coolant passages via the unique manifold. The design allowed the drive system to be mounted closer to the engine block. Because of the 5300 V-8’s relatively low inertia, which can be up to 50 percent less at the crankshaft damper than a 6.0L V-8, a hydraulic belt tensioner was used instead of a conventional rotary tensioner.
(I read this as shortened primarily externally, and no mention of the cam being shortened)
The sideways position of the 5300 V-8 required revisions to the lubrication system. Engineers tested 5300 V-8 equipped test vehicles on racetracks, subjecting them to high-load turns that guided the development of special oil pan baffles that ensure lubrication during cornering. In addition, because Gen IV engines don’t have a block-mounted oil filter – it’s located on the oil pan – the 5300 V-8’s filter offers easy access.
(oil pan was to be expected to be different)
To fit the “sideways” positioning in the Grand Prix, several changes were made to shorten the engine’s overall length. The crankshaft was shortened by 13 mm – 3 mm at the rear and 10 mm at the front – and the entire accessory drive system was designed to reduce space. The water pump and all other accessories, including the power steering pump, are driven on a single-belt drive system – the longest drive system in a GM vehicle.
Engineers devised an elongated water pump manifold, which features a remote-mounted pump that feeds the stock Gen IV coolant passages via the unique manifold. The design allowed the drive system to be mounted closer to the engine block. Because of the 5300 V-8’s relatively low inertia, which can be up to 50 percent less at the crankshaft damper than a 6.0L V-8, a hydraulic belt tensioner was used instead of a conventional rotary tensioner.
(I read this as shortened primarily externally, and no mention of the cam being shortened)
The sideways position of the 5300 V-8 required revisions to the lubrication system. Engineers tested 5300 V-8 equipped test vehicles on racetracks, subjecting them to high-load turns that guided the development of special oil pan baffles that ensure lubrication during cornering. In addition, because Gen IV engines don’t have a block-mounted oil filter – it’s located on the oil pan – the 5300 V-8’s filter offers easy access.
(oil pan was to be expected to be different)
http://www.ls4wbody.com/forum/index.php?showtopic=14
PS: Curious... what you planning to put together?
Last edited by BigMikeGXP; Apr 18, 2006 at 07:14 AM.
