Old dog trying to learn new tricks

metro411 · October 10th, 2007, 12:59 PM

I'm just learning about engines. I've got a question that I hope someone might be able to help me out with. I've got a 394 olds. on the back of the manifold by the fire wall there is a valve. When I took off the valve cover, there is this cylinder type sleeve / tube that is inside of the manifold. It spins around and if I turn it to where the lip is on the bottom, I can make it fit tight again. Can anyone tell me what this is or where can I find out?

Totally lost....but trying anyways.

59-59-59 · October 15th, 2007, 01:41 PM

Quote:

Originally Posted by metro411

there is this cylinder type sleeve / tube that is inside of the manifold. It spins around and if I turn it to where the lip is on the bottom, I can make it fit tight again.

Totally lost....but trying anyways.

I'm kind of lost too, but what I THINK you are referring to inside of the manifold is the heat tube for the choke

metro411 · October 15th, 2007, 02:12 PM

It's a valve plate that has a nozzle that curves about three inches long and probably 3'8 inch round. When I take the plate off there is a steel sleeve/tube probably two inch diameter. I'm going to take a picture of it and post it. Thanks for your response. This forum is great. I'm outta town, I'll post a pic in three days. Once again thanks very much.

Mike

Olds64 · October 15th, 2007, 05:27 PM

Mike, I am almost certain you are referring to the heater control valve. When I bought my Olds the 394 didn't have one. A previous owner had removed it and just put the hose to the heater core directly onto a nipple that went into the head. All this does is shut off the flow of coolant to the heater core. Please post a pic though so we can be sure.

59-59-59 · October 15th, 2007, 10:52 PM

Ok, I think I solved the mystery - it is unique to '59 and '60 engine blocks. This is the downdraft tube assembly to relieve crankcase pressure as the valve covers for '59 and '60 did not have any holes in them for PCV or other method of relieving pressure. The downdraft tube assembly is bolted to the back of the block, NOT the intake manifold. I think the writer confused a valve cover for an intake manifold in the original posting.

metro411 · October 16th, 2007, 01:31 PM

Just wanted to thank everyone for their help. I got off the phone yesterday with Dr. Olds. He asked what I was putting the 394 into. I told him into my 1949 ford f1 pickup. He said, " I like you already." He's going to check to see what I've got. The CID number on my engine says. 102 CFD 578135-1 1/8 and the tranny says CFD 861-872. Anyways, thanks again for helping me with this.

Oldsguy · October 17th, 2007, 06:18 AM

You definitely need to get over to the H.A.M.B. forum of jalopyjournal.com They would like you over there too.

October 10th, 2007, 12:59 PM	#1 (permalink)
metro411 Junior Member Join Date: Oct 2007 Posts: 7	Old dog trying to learn new tricks I'm just learning about engines. I've got a question that I hope someone might be able to help me out with. I've got a 394 olds. on the back of the manifold by the fire wall there is a valve. When I took off the valve cover, there is this cylinder type sleeve / tube that is inside of the manifold. It spins around and if I turn it to where the lip is on the bottom, I can make it fit tight again. Can anyone tell me what this is or where can I find out? Totally lost....but trying anyways.

October 16th, 2007, 01:31 PM	#6 (permalink)
metro411 Junior Member Join Date: Oct 2007 Posts: 7	Way new to mechanics...Forgive the folly... Just wanted to thank everyone for their help. I got off the phone yesterday with Dr. Olds. He asked what I was putting the 394 into. I told him into my 1949 ford f1 pickup. He said, " I like you already." He's going to check to see what I've got. The CID number on my engine says. 102 CFD 578135-1 1/8 and the tranny says CFD 861-872. Anyways, thanks again for helping me with this.

October 17th, 2007, 06:18 AM	#7 (permalink)
Oldsguy Hot Rodder at heart Administrator Join Date: May 2004 Location: Lees Summit MO Posts: 5,302	You definitely need to get over to the H.A.M.B. forum of jalopyjournal.com They would like you over there too. __________________ Dan '77 Cutlass Supreme '46 2 door "The rocket 455.....it's a sledgehammer approach to a thumbtack world" LuxBlue of HAMB.

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October 15th, 2007, 02:12 PM	#3 (permalink)
metro411 Junior Member Join Date: Oct 2007 Posts: 7	It's a valve plate that has a nozzle that curves about three inches long and probably 3'8 inch round. When I take the plate off there is a steel sleeve/tube probably two inch diameter. I'm going to take a picture of it and post it. Thanks for your response. This forum is great. I'm outta town, I'll post a pic in three days. Once again thanks very much. Mike

October 15th, 2007, 05:27 PM	#4 (permalink)
Olds64 Landyacht Club President Join Date: Jul 2007 Location: Lawton, OK Posts: 4,181	Mike, I am almost certain you are referring to the heater control valve. When I bought my Olds the 394 didn't have one. A previous owner had removed it and just put the hose to the heater core directly onto a nipple that went into the head. All this does is shut off the flow of coolant to the heater core. Please post a pic though so we can be sure.

October 15th, 2007, 10:52 PM	#5 (permalink)
59-59-59 Registered User Join Date: Sep 2006 Posts: 295	Ok, I think I solved the mystery - it is unique to '59 and '60 engine blocks. This is the downdraft tube assembly to relieve crankcase pressure as the valve covers for '59 and '60 did not have any holes in them for PCV or other method of relieving pressure. The downdraft tube assembly is bolted to the back of the block, NOT the intake manifold. I think the writer confused a valve cover for an intake manifold in the original posting.