LS6 Low Rise Intake
 

I have an LS6 569 intake and can't find a casting date on it. It may have come from a 1973 marine engine. Any enlightenment?

Re: LS6 Low Rise Intake
 

Does it have a riveted on oil splash guard underneath?

Re: LS6 Low Rise Intake
 

Yes,it has the riveted on steel shield.

Re: LS6 Low Rise Intake
 

Drill it out,there should be a date under there.

Re: LS6 Low Rise Intake
 

The Date code is under the shield. Here is a photo of mine before I put it on the engine.

I decided not to take the shield off mine to just check the date as I was confident it was original to my car anyways and did not want to re-rivet the shield back on. Once it's on the motor who will see the date anyways [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

Re: LS6 Low Rise Intake
 

The only issue with cleaning them is if you were to glass bead the intake -- trash may remain under the heat shield ... I have always (and very carefully) removed the rivets and and cleaned under the shield, then reassembled.

But there are other methods to clean ...

The TAZ

Re: LS6 Low Rise Intake
 

Sand blasting or glass beading without removing the shield is just inviting disaster. Sand is deadly to the whole engine.

Re: LS6 Low Rise Intake
 

Are the runners numbered on your manifold? If they are its 1971 and later.

Re: LS6 Low Rise Intake
 

No runner numbers and thanks for the help guys. It is appreciated.

Re: LS6 Low Rise Intake
 

If you do take the shield off and need new rivets, I have some that I will send you. They came straight from Chevrolet Engine Plant in Flint years ago.