[morejunk]

Could someone tell me if a 98 chevy 5.7 L31 comes with brass freeze plugs from the facory? trying to determine if an engine has been rebuilt. thanks

[oldbogie]

Originally Posted by morejunk

Could someone tell me if a 98 chevy 5.7 L31 comes with brass freeze plugs from the facory? trying to determine if an engine has been rebuilt. thanks

The factory does not use brass freeze plugs, but a set of brass plugs doesn't mean anything more than the factory plugs have been replaced.

Bogie

[morejunk]

Ok thanks! It's a 98 with 104K miles and I pulled the engine and all freeze plugs are brass, so they woulda had to pull the engine to replace all the plugs. Just thinking maybe they rebuilt it while they had it out? I haven't pulled the heads and miked the bores yet. to see if it's been bored any.Just curious, I may rebuild the engine or may keep it for a spare. thanks though!

[Stroke]

The factory does not use brass freeze plugs

Especially when scrap brass is at $2.50/lb.

[matt167]

generally, brass is only factory in marine only applications so ither, the plugs have been replaced for some reason or the engine was originally in a marine application

[CNC BLOCKS NE]

We buy alot of new blocks from GM with brass freeze plugs and even some of the Bowtie blocks come with brass freeze plugs, If they are GM freeze plugs they have no numbers on them.

[BOBCRMAN@aol.com]

Also the GM brass plugs are a bit thinner material than aftermkt plugs. Only see them in post 87 blocks. Usually the HD stuff.

[morejunk]

Thanks, probably factory plugs then.This is from a wrecked 3/4 ton 4x4. I will pull the heads to mic bores and the pan to see if 4 bolt mains. Maybe I'll get lucky! thanks for all the help everyone.