396 oil gauge line routing and fittings

[DeanZ10]

Posted this under originality with no responses, so thought I would try here. Thx for your help if you can.

I see this was discussed back in 2016 but with seemingly no final conclusions. Does anyone have a pic of the original set up for the L35? Looking at the aim page 416.  Should it utilize the bracket #8? Is the line shown between that bracket and elbow #5 a metal sleeve with the nylon/plastic hose routed inside or is metal portion carry oil??  Thx for revisiting the subject.
Dean

[Mike S]

What year L35? My 67 has the nylon line from the block fitting to the gauge.  The metal pipe from the block fitting to the bracket was later...not sure what year though.

Mike

[DeanZ10]

Thanks for the response. It is a 69 model.
Dean

[camaro cat]

I'll see if I can help you out. I have an original bracket & bolt (#3954228 & 3817006) that goes on the head, NOS nylon & steel line (#3954225), and original brass fittings (#444052 & 444030) that screw into the block. Mine is for an L78 but all except possibly the fitting that screws into the block above oil filter should be the same for all BB. I was trying to find the original rubber grommet (#3906193) that the nylon line uses to pass through the firewall but am not sure which drawer it is in. I'll see if I can find it and even if not I'll post pictures of what items you want to see.
 Let me know if you want photos of all or some.

Loren

[camaro cat]

I'll add a little more. I miss posted the part numbers I have. It looks to me that the nylon line #3921433 is used on both SB & BB, even though they source oil pressure in distinctly different areas on the 2 engines. On the BB, after going to the left side of the engine where bracket #3954228 attaches, the remaining distance down to above the oil filer is filled by the steel line likely because the engine heat there would be too high for the nylon line to survive very long.

Loren

[DeanZ10]

Loren
Thank you very much for your assistant. Yes, love to have any pics you can send. By chance do you have one of it installed?
Thank you
Dean

[camaro cat]

No, unfortunately for posterity, my car is still all in pieces but I think the pictures should tell you what you need to know. I need to bring the line in the house and take it all apart and photo each part as best I can with all markings and such. I'll try and accomplish that in the next day or two.

Loren

[DeanZ10]

Thanks and please take a pic prior to taking it apart if you would.
Dean

[x66 714]

Is this what you want to see?...Joe

[DeanZ10]

Funny when you see something and just have to say.duhhh. Lol. Makes perfect sense to me now. Thank you Joe!
Hopefully Loren’s pics will duplicate this.
Thx
Again
Dean

[x66 714]

No problem Dean. as you can see my engine is out of the car. I just kept forgetting to take a picture. Fighting time. The car is being painted so I'm trying to do everything else before it comes back...Joe

[camaro cat]

Joe, this brings up a question I had when I received my bracket and bolt that attaches to the head and hold the top end of the steel oil line. My bracket is also painted chevy orange but since those parts are listed in the AIM, meaning they were installed at Norwood or Los Angeles, long after the engine was painted in Tonawanda, shouldn't they be an unpainted bracket? I'd like to hear what those who have seen this say.

Loren

[x66 714]

I'm sure it wasn't supposed to be orange. Most likely not painted or black. Not sure myself. That is what I did in 1982 maybe. I will correct it...Joe

[x66 714]

I removed the bracket yesterday & found no evidence of paint on the back side....Joe

[HawkX66]

Sorry for the late reply... Here's a couple of pics to add that I hope will help.

U17 Oil pressure line fittings by Dave H, on Flickr

U17 Oil Fitting by Dave H, on Flickr


20141122_094528 by Dave H, on Flickr


U17 Oil Fitting L34 by Dave H, on Flickr




firewall pic by Dave H, on Flickr

[camaro cat]

I finally did what I said I would do. This is what I have and I have learned a few things and also raised some more questions. All this over a couple of small diameter tubes and some brass fittings. First, I was surprised at how long the Nylon Hose Asm. #3921433is at 61.5 inches. Is it possible this NOS replacement piece is actually this long to fit multiple applications on a wide variety of GM vehicles as a hose is a hose and they all likely use the same size fittings? This Hose uses the same brass ferrules on both ends but is different than the ones used on the steel pipe.

The Steel Pipe Asm. #3954225 is exactly 8 inches long and uses 2 different style ferrules on the 2 ends the wedge-shaped ferrule goes to the upside into the fitting that attaches with bracket #3954228. This brass fitting does not have a part # in the AIM so it must come with either the Hose Asm. or Pipe Asm. and I suspect it belongs with the Pipe Asm. as this is a BB only part. The solid wider hex part of the fitting needs to go to the bottom to match up with the wedge-shaped ferrule on the Steel Pipe Asm. The thinner brass nut is on top and tightens against bracket 3954228.

The Bushing #444030 listed in the AIM must only be used on L35 & L34 blocks as mine is a much larger size to screw into the block as mine is for an L78. Does anybody know if this is correct and if so what the correct pn# is for that piece? It looks to me that the AIM is incorrect in how this is visually drawn. The AIM lists a Bushing #444030 & Elbow #444052 which in reality looks to be accomplished by 1 piece. Also, the drawing for how the Steel Pipe attaches to the Elbow looks backward to me.

I've taken pictures but they all need to be resized and it looks to me like all the important information is already here except I'll see if I can post the different L78 Bushing.

Loren

[HawkX66]

I finally did what I said I would do. This is what I have and I have learned a few things and also raised some more questions. All this over a couple of small diameter tubes and some brass fittings. First, I was surprised at how long the Nylon Hose Asm. #3921433is at 61.5 inches. Is it possible this NOS replacement piece is actually this long to fit multiple applications on a wide variety of GM vehicles as a hose is a hose and they all likely use the same size fittings? This Hose uses the same brass ferrules on both ends but is different than the ones used on the steel pipe.

The Steel Pipe Asm. #3954225 is exactly 8 inches long and uses 2 different style ferrules on the 2 ends the wedge-shaped ferrule goes to the upside into the fitting that attaches with bracket #3954228. This brass fitting does not have a part # in the AIM so it must come with either the Hose Asm. or Pipe Asm. and I suspect it belongs with the Pipe Asm. as this is a BB only part. The solid wider hex part of the fitting needs to go to the bottom to match up with the wedge-shaped ferrule on the Steel Pipe Asm. The thinner brass nut is on top and tightens against bracket 3954228.

The Bushing #444030 listed in the AIM must only be used on L35 & L34 blocks as mine is a much larger size to screw into the block as mine is for an L78. Does anybody know if this is correct and if so what the correct pn# is for that piece? It looks to me that the AIM is incorrect in how this is visually drawn. The AIM lists a Bushing #444030 & Elbow #444052 which in reality looks to be accomplished by 1 piece. Also, the drawing for how the Steel Pipe attaches to the Elbow looks backward to me.

I've taken pictures but they all need to be resized and it looks to me like all the important information is already here except I'll see if I can post the different L78 Bushing.

Loren

The L78 is different from the L34 and L35. See the attached pics that are like the one you posted. The 61" nylon line makes sense as it needs to reach the console gauges through the hole in the firewall on the U17 option like the picture I posted.