LS1 block lifespan?
Thread Starter
Teching In
Joined: Mar 2011
Posts: 11
Likes: 0
From: Reading, PA
LS1 block lifespan? I have a 99 pontiac trans am ls1 350 engine. The car has been stock for 100 thousand miles before i decided to pull it out due to misfire issues. Does anyone know how long these blocks last cause i plan to rebuild the hole engine both bottom and top end. Is it safe to use my old block or is it smarter to get a new one?
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TECH Regular
Joined: Apr 2010
Posts: 464
Likes: 1
From: California
On a side note, does anyone know typically how long the bottom end (crank, rods, pistons, balanced/blueprinted etc) last on LS1's seeing no more than 400rwhp and used as a daily driver???
I know typically when you do a cam swap you typically redo the entire top end (Heads, valvetrain, gaskets, etc.)
I know typically when you do a cam swap you typically redo the entire top end (Heads, valvetrain, gaskets, etc.)
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Verdad Gallardo i think it really depends on how well its been took care of and how often you beat on it. i know there are a few guys on here well above the 200k mark still running 11's. seems the major weak point are the rod bolts. I think the rod bolts are like the stock 10 bolts, some hold up, some decide to let loose.
Thread Starter
Teching In
Joined: Mar 2011
Posts: 11
Likes: 0
From: Reading, PA
I couldnt figure out the misfire,
Spark plugs changed
switched coil packs to different cylinder
spark plug wires changed
compression check was good
I got so pissed i just pulled the bad boy out but it was a good thing cause i plan to redo whole motor and respray the bay.
Spark plugs changed
switched coil packs to different cylinder
spark plug wires changed
compression check was good
I got so pissed i just pulled the bad boy out but it was a good thing cause i plan to redo whole motor and respray the bay.
Staging Lane
Joined: Apr 2007
Posts: 67
Likes: 0
From: Greenville, SC
You may wanna check out your injectors as well. Played hell once chasing what i thought was a ignition related misfire that turned out to be a clogged injector. Never set any injector, fuel trim or o2 codes. Just a P0300. Wasnt even a misfire you could feel, just enough for the ecm to pick up.
Thread Starter
Teching In
Joined: Mar 2011
Posts: 11
Likes: 0
From: Reading, PA
O nice ur lucky cause mine misfire lead to a drastic lose of power and hole car shaking pretty bad. i thought it was a rod or even the piston rings but i just took the pistons out last night and no signs of damage. i no sometimes clogged cats can make certain cylinders misfire.
