305 Questions

[Mikes98]

I also have a little piston slap in the cold on my 350. 225K on the motor. Hopefully it isn’t too bad because I’m not putting a motor in it yet.

Yes I believe the truck to be an oddity with the extended cab, 5 speed, and stepside bed.

If I'm not mistaken, it has to do with the cast pistons ...and it is quite common in GM LS engines ...which are what we have in our trucks.

What Is Piston Slap, And Will It Harm My Car?

Are you aware the GM LS engine is known for piston slapping when cold? It’s a rather loud and annoying knocking noise from the motor which is more common during cold starts. And while older engines…

autofella.com

It sounds bad, especially in the colder weather, but mine's been doing it since I got it in 2001 and hasn't gotten any worse over the years.

 

[Schurkey]

GM has had piston-slap problems since at least the 1990s.

GM says it doesn't hurt anything, in order to avoid having to fix that mistake. In fact, when it gets bad enough, it triggers the knock sensor which reduces timing. That hurts power and fuel economy. But since the EPA is in the pockets of whoever pays the right bribes, nothing was ever done to make GM live up to their claimed fuel economy and emissions claims.

 

[97C1500TJ]

Wow!. You didn't mention the stepside. I would definitely keep the truck stock. There is a website called "Comp nine"; it is a very sophisticated VIN decoder. When it first came out (many years ago) it was free; now you have to pay for the service. But it will tell you *everything* about your vehicle (in my case my '98 GMC). The other thing it will do is show you how rare your vehicle is with respect to the options on it based on the model year. I never expected my humble 5.0L SL shortbed to be any kind of rare but ...the Comp nine search came up with *4* '98 C1500's that were ordered with the same options on my truck ...that's 0.004% of the total production run (100,504) of the same year ('98) and model . It would be interesting to find out how many trucks like yours were built in '95 ...I'm thinking yours is gonna be pretty rare.

That’s pretty cool! Thanks. It’ll be interesting to see how many were made exactly.

 

[97C1500TJ]

Picked her up today! Really dirty inside but it’ll be easy to clean up. I’ll post a few more in a bit.

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[stutaeng]

Congrats! Looks like a clean, unmolested truck. I love those!

 

[HeavyAsAChevy]

It's fine. A 305 will go just as many miles as a 350 or 4.3l v6.

my 96’ 262ci just blew up, so I wouldn’t play it up too much. Lolol

 

[GoToGuy]

I remember reading that you could put a Buick GN engine in a Rodeo. You could probably run the speed limit up the hill towing then....

 

[97C1500TJ]

Some interior shots

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