Shiny Pistons in 305
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Junior Member


Joined: Oct 2019
Posts: 90
Likes: 2
From: California
Car: 1985 Camaro IROCZ
Engine: 305 TPI
Transmission: M29 T56
Axle/Gears: 9 bolt 3.27s
Shiny Pistons in 305
Hello everyone.
So I recently had to remove my oil pan the replace a crusty cork gasket. Adding my turbos oil drains to the pan just finally killed the gasket and the thing was LEAKING. So I replaced the thing. Replaced it while the engine was in the car still. That was fun. Also found half my dipstick chewed up by my crank lol engine is great. Anyway while everything was off I got sight of my pistons and they looked very shiny. Compared to the rest of the cast items. Almost looked like aluminum. I remember removing stuff off a vortec 350 and those pistons looked nothing like the ones in my 305. I believe the engine casting is 210? 201? Its a 1985 IROCZ with the 85 LB9. I think the engine was replaced with a Monte Carlo SS 5.0 and got the TPI intake. I dont know if any of those cars got upgraded slugs. So these bad boys not cast pistons? Not like it matters. I think the engine still blows up around the same HP.
So I recently had to remove my oil pan the replace a crusty cork gasket. Adding my turbos oil drains to the pan just finally killed the gasket and the thing was LEAKING. So I replaced the thing. Replaced it while the engine was in the car still. That was fun. Also found half my dipstick chewed up by my crank lol engine is great. Anyway while everything was off I got sight of my pistons and they looked very shiny. Compared to the rest of the cast items. Almost looked like aluminum. I remember removing stuff off a vortec 350 and those pistons looked nothing like the ones in my 305. I believe the engine casting is 210? 201? Its a 1985 IROCZ with the 85 LB9. I think the engine was replaced with a Monte Carlo SS 5.0 and got the TPI intake. I dont know if any of those cars got upgraded slugs. So these bad boys not cast pistons? Not like it matters. I think the engine still blows up around the same HP.
Member
Joined: Oct 2012
Posts: 104
Likes: 22
From: Glendale, AZ
Car: 1983 LU5 Trans Am, 1967 Chevelle
Engine: LU5, LSx
Transmission: 700R4, 4L60E
Axle/Gears: 3.73, 3.73
Re: Shiny Pistons in 305
Cast aluminum IS aluminum. The 85 LB9 got the same flat tops as the 83-86 L69. Nothing special. Just plain old cast pistons.
Thread Starter
Junior Member


Joined: Oct 2019
Posts: 90
Likes: 2
From: California
Car: 1985 Camaro IROCZ
Engine: 305 TPI
Transmission: M29 T56
Axle/Gears: 9 bolt 3.27s
Re: Shiny Pistons in 305
Oh wow. I had no idea. See the ones I've pulled before and even in my dads LQ in his truck. They weren't that shiny. These things looked like my intake. But that makes sense. Anyway! I didn't know. Figured they'd be dull. Thanks tho!
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