'67 L79 formed steel fuel line

[Leif A.]

Opinions on the routing of this fuel line. It touches #4 fuel runner and doesn't appear that it's routing can/should be altered. What have y'all seen?

[Gene M.]

Re: '67 L79 formed steel fuel line

Leif,
I see nothing out of the norm in your photos. There looks to be free of interference between line and manifold. Where do you have an issue?

[Leif A.]

Re: '67 L79 formed steel fuel line

Leif,
I see nothing out of the norm in your photos. There looks to be free of interference between line and manifold. Where do you have an issue?

Gene,
In the fourth photo I hope you can see where the fuel line is resting against the fuel runner (manifold). Just concerned about fuel temp with the line touching the manifold. Car runs great except during the normal very warm operating temps we deal with here in Texas...even then not a real overt issue. Just appears by looking at it that it maybe could/should be routed a bit higher off the manifold. Most likely unnecessary concern on my part. Thank you for your observations.

[Keith B.]

Re: '67 L79 formed steel fuel line

If your concerned with heat shoot a IR gun at the fuel pump then on the intake runner. I think your over worried about a non issue.

[Gene M.]

Re: '67 L79 formed steel fuel line

Gene,
In the fourth photo I hope you can see where the fuel line is resting against the fuel runner (manifold). Just concerned about fuel temp with the line touching the manifold. Car runs great except during the normal very warm operating temps we deal with here in Texas...even then not a real overt issue. Just appears by looking at it that it maybe could/should be routed a bit higher off the manifold. Most likely unnecessary concern on my part. Thank you for your observations.

ok, Now I see where you are touching. You could cut the flair at the carb about 1/4" and reflair it. That would raise it just enough to not touch. But to ease your mind I've seen many original lines that touch even more with out any issues. The temperature housing has been more the issue with others and they all seem to run fine. The intake manifold runner should not get to any temperature that will cause you vapor lock.

[Leif A.]

Re: '67 L79 formed steel fuel line

Gene & Keith,
Thanks for assuaging my unnecessary concerns. Appreciate y'alls input

[Mark E.]

Re: '67 L79 formed steel fuel line

Really? Are we saying Chevy designed the fuel line on these cars to rub against the manifold?

Heat transfer isn't the concern. But from a safety perspective (wear or failure from vibration, rubbing), on my car I wouldn't like the fuel line rubbing against other components.

Is this a reproduction or home-bent line? Maybe it just needs further adjustment/bending. The interference with the manifold seems so slight... can the line can be persuaded forward just a bit to fix this? I remember the need to adjust/bend the repro fuel line to fit properly
on my LS5.

[Timothy B.]

Re: '67 L79 formed steel fuel line

Really? Are we saying Chevy designed the fuel line on these cars to rub against the manifold?

Heat transfer isn't the concern. But from a safety perspective (wear or failure from vibration, rubbing), on my car I wouldn't like the fuel line rubbing against other components.

Is this a reproduction or home-bent line? Maybe it just needs further adjustment/bending. The interference with the manifold seems so slight... can the line can be persuaded forward just a bit to fix this? I remember the need to adjust/bend the repro fuel line to fit properly
on my LS5.

Leif,

I agree 100% with the above post. Take some time in the future and bend/adjust until it runs across the engine without touching anything. Also, check the bends on the vertical run so the line does not touch the lower radiator hose and the heater hose also allows a air gap.

[Leif A.]

Re: '67 L79 formed steel fuel line

Leif,

I agree 100% with the above post. Take some time in the future and bend/adjust until it runs across the engine without touching anything. Also, check the bends on the vertical run so the line does not touch the lower radiator hose and the heater hose also allows a air gap.

Timothy & Mark,
Thanks for your additional advice and concern. The area I'm questioning is the only area from pump to carb that has any interference at all. I'll loosen the fitting at the carb and gently persuade the line away from the manifold. Any suggestions to help me avoid damage to the current line?

[Michael H.]

Re: '67 L79 formed steel fuel line

I would say the line is short on the fuel pump side by about an 1 inch unless you can re-shape it so it doesn't ride on the manifold.

Mike

[Leif A.]

Re: '67 L79 formed steel fuel line

I would say the line is short on the fuel pump side by about an 1 inch unless you can re-shape it so it doesn't ride on the manifold.

Mike

Michael,
Would it be possible for you to post a picture of your L79 fuel line showing the same location that I'm referencing?

[Steven B.]

Re: '67 L79 formed steel fuel line

It would appear that there is as mentioned, little likelihood that there would be any problem with heat transfer with such little contact area. Rubbing shouldn't be a problem since the line is steel all the way to the fuel pump and would probably not have an issue with rubbing against the manifold. However, in looking closely again at photo #4, it would appear as though the last bend and upward portion of the line to the carburetor is not in line with the inlet and fitting but is bent toward the manifold. you may be able to bend the line outward slightly away from the manifold. You would not need much clearance. If you do try to bend it, you will want to be careful to not allow it to bend at the carburetor. That might wind up causing a leaking condition at the fuel inlet. I would be inclined to leave it alone and just keep an eye on it.
Steve

[Ara G.]

Re: '67 L79 formed steel fuel line

Leif,
I have some pictures of a spectacular Bowtie L79 coupe that a friend of mine used to own. I will try to post some pics tonight of the fuel line, or at minimum email them to you so you can post them. Regards. ARA..... Carb studs? ....LOL.....Hope you're well, looking forward to seeing you in Frisco....

[Leif A.]

Re: '67 L79 formed steel fuel line

It would appear that there is as mentioned, little likelihood that there would be any problem with heat transfer with such little contact area. Rubbing shouldn't be a problem since the line is steel all the way to the fuel pump and would probably not have an issue with rubbing against the manifold. However, in looking closely again at photo #4, it would appear as though the last bend and upward portion of the line to the carburetor is not in line with the inlet and fitting but is bent toward the manifold. you may be able to bend the line outward slightly away from the manifold. You would not need much clearance. If you do try to bend it, you will want to be careful to not allow it to bend at the carburetor. That might wind up causing a leaking condition at the fuel inlet. I would be inclined to leave it alone and just keep an eye on it.
Steve

Steve,
I tend to agree. There really isn't an operational issue and attempting to bend that steel line could cause me more issues than I set out for. I'm just going to leave well enough alone. Thanks.

[Leif A.]

Re: '67 L79 formed steel fuel line

Leif,
I have some pictures of a spectacular Bowtie L79 coupe that a friend of mine used to own. I will try to post some pics tonight of the fuel line, or at minimum email them to you so you can post them. Regards. ARA..... Carb studs? ....LOL.....Hope you're well, looking forward to seeing you in Frisco....

Thanks, Ara. Just for reference purposes that would be great. Everything else is spectacular...looking forward to Frisco and re-visiting with you.