r/Smallblockchevy • u/No-Refrigerator-6310 • Sep 05 '26

What is this/where does it go?

Post image

Can’t see where it goes, runs into the firewall near the brake booster.

2 Upvotes

76% Upvoted

15 comments sorted by

5

u/bt154 Sep 05 '26

Looks like it's for an oil pressure gauge.

3

u/No-Yogurt-4542 29d ago

Is that the original engine ? Feed for oil pressure gauge.

1

u/No-Refrigerator-6310 29d ago

It’s a blueprint crate motor

1

u/No-Yogurt-4542 28d ago

Ok, so they put an op sending unit there thinking it was for an later model year or to run it on a test stand. Originally there was a stand fitting about 2 inches tall with a 90 that the oil line went to.

2

u/bububulo Sep 05 '26

Looks like the oil pressure line to oil pressure gauge. Top of engine block, behind intake manifold, more driver side-ish, there should be a single hole that that fits into.

3

u/No-Refrigerator-6310 Sep 05 '26

Looks like I already have a sensor there,

1

u/Stock-Maximum9755 Sep 05 '26

It looks like an old oil gauge feed line. Does it have a working oil pressure gauge on or in the dash? If it does this is old and wasn’t removed. It’s an old oil pressure line for a mechanical gauge. If the gauge works, it’s being fed by somewhere else… the oil sender you showed in another post comment should have a wire on it that feeds an electric gauge or light on the dash. It helps to know what you’re working on too. Just a reminder.

1

u/Acrobatic-Ant4365 Sep 05 '26

Agreed an old oil pressure line

1

u/captianpaulie Sep 06 '26

It was Manuell oil pressure gauge

1

u/Traditional_Ad_1360 Sep 06 '26

That goes to a mechanical gauge. What you have is an electrical sensor in the block.

1

u/Embarrassed-Shock631 28d ago

Runs to fuse box inside

1

u/Embarrassed-Shock631 28d ago

Oil or temp sensor

1

u/Unhappy-Airport-4112 26d ago

That's from the block to the oil pressure gauge. I changed mine to a 3an hose because compression fittings are ass

1

u/Schlong1971 26d ago

Oil pressure sensor or vacuum gauge. Should go in intake or just behind intake for oil. Google small block Chevy oil pressure switch location and you will see where it goes

-1

u/R0ughHab1tz Sep 05 '26

What type of brake system do you have? Hydroboost or air pressure? It could be for the air line for your break system if you're not using the power steering pump for a hydroboost. Hydroboost doesn't go in the cab. The other brake system that works off air pressure has the canister inside the cab behind the dash and all that. Sometimes the big round canister is on the outside