LT-1 engine questions and how did he get in?

[Joe L.]

Re: LT-1 engine questions and how did he get in?

The date code on the bearing inserts will tell a lot too.............

Dave----


... and if the rear of the bearing shells are stamped "GMM" (representing General Motors Moraine), it means they're likely original since VERY few folks replaced bearings with GM bearings due to cost of same (except for me; I always used "GMM" bearings when they were available and I've got a "lifetime" supply for the future).

[John H.]

Re: LT-1 engine questions and how did he get in?

It's been apart before - the rod caps are stamped/match-numbered adjacent to the parting line, and the factory didn't do that.

RIP cricket - he had a helluva ride!

[Keith L.]

Re: LT-1 engine questions and how did he get in?

Yea John, I noticed that this afternoon. The bore is standard though. I pulled the cam out. I don't recognize the markings. Any ideas? On the back end: 150 MF13 and somthing I can't make out
Between lobes: C2 D2
Looks like a cast date with screw heads but only" K"
CWC RSCD
55

[Joe L.]

Re: LT-1 engine questions and how did he get in?

Yea John, I noticed that this afternoon. The bore is standard though. I pulled the cam out. I don't recognize the markings. Any ideas? On the back end: 150 MF13 and somthing I can't make out
Between lobes: C2 D2
Looks like a cast date with screw heads but only" K"
CWC RSCD
55

Keith-----


"CWC" is a company that is one of the if not the largest manufacturer of camshaft CORES. They manufacture them for GM as well as many other auto makers and aftermarket cam manufacturers. Generally, in days of yore, they manufactured "generic" cores. So, none of the casting marks between the lobes will identify the specific cam. It could be a GM cam, though, of later SERVICE origin with a CWC-source core. Or, it could also be an aftermarket cam, either a clone of your original or otherwise..

At the time that your engine was originally built, most GM cams were ground from specific cores cast in GM foundries and machined at the engine plants. Your original cam would have had the "3972182" or "2182" cast between the lobes. There would also have been a "square" casting symbol to be found. As I say, though, in later SERVICE the specific, GM-cast cam cores were dropped and "CWC" generic cores used. With these cores, any small block cam could be ground from the same core.

Check the ends of the cam for a stamped number. Very often, GM (and even aftermarket) cams will have an identifying number stamped on one of the ends.

[Dan P.]

Re: LT-1 engine questions and how did he get in?

You doing a complete resto on that ol' roach?

[Chris L.]

Re: LT-1 engine questions and how did he get in?

Looks like a b"roach" mark!! need to consult the judging manual

[Keith L.]

Re: LT-1 engine questions and how did he get in?

The only thing on the end is 150 and after looking again it looks like two idenitical logos, a C with a M inside it and between them M13

[Joe L.]

Re: LT-1 engine questions and how did he get in?

The only thing on the end is 150 and after looking again it looks like two idenitical logos, a C with a M inside it and between them M13

Keith-----


The "MF 13?" (which is likely "MF 130) identifies the cam. However, it's an aftermarket identifier and I can't decode it. I've seen these "MF" stamped cams before but I just can't recall what manufacturer used it. It's pretty common, though, so I expect it's one of the major manufacturers.

[Butch P.]

Re: LT-1 engine questions and how did he get in?

Keith
I think I see #s stamped on the rod and cap to indicate the rod to crank journal location and to mate the cap to the same rod.This would be done by a rebuilder not the factory.

[Richard W.]

Re: LT-1 engine questions and how did he get in?

Looks like the nuts on the connecting rod bolts have been off on the far right side. Dale

Looks like the nuts on the cricket have been fiddled with too.