73 L48 headlight check valve/filter hoses

[Douglas C.]

Please see pic, is this the correct routing and hose lengths to intake fitting? I don't find a clear drawing in AIM.
Tks. Doug 20220309_130155.jpgk

[Tom R.]

Re: 73 L48 headlight check valve/filter hoses

the hose from the port looks longer then we typically find. Here are a couple of photos from the 73/74 TIMJG. The first is a 73 while the overhead view is a 74, both L48s. Otherwise, the order of the filters looks correct.

manifoldintake_vacuum_single.jpg

74 L48
emissions_L48_74.jpg

[Douglas C.]

Re: 73 L48 headlight check valve/filter hoses

the hose from the port looks longer then we typically find. Here are a couple of photos from the 73/74 TIMJG. The first is a 73 while the overhead view is a 74, both L48s. Otherwise, the order of the filters looks correct.

[ATTACH=CONFIG]110683[/ATTACH]

74 L48
[ATTACH=CONFIG]110684[/ATTACH]

Thanks Tom. Top photo looks like the check valve is over the valve cover and second photo it sits behind valve cover. Is either way correct? And, how can I get a copy of the 74/74 TIMJG.
Tks. Doug

[Jimmy P.]

Re: 73 L48 headlight check valve/filter hoses

Doug,
Either way would be ok, not a big deal. The hose lengths weren't always exactly the same size. Yours does seem a bit too long. No harm in shortening it a little if you'd like to straighten out the path it takes. Important thing is that it has the white stripe. You can go to the NCRS store here on this site and order the 73-74 TIM&JG.

[Douglas C.]

Re: 73 L48 headlight check valve/filter hoses

Doug,
Either way would be ok, not a big deal. The hose lengths weren't always exactly the same size. Yours does seem a bit too long. No harm in shortening it a little if you'd like to straighten out the path it takes. Important thing is that it has the white stripe. You can go to the NCRS store here on this site and order the 73-74 TIM&JG.

Thanks Jimmy.

[Douglas C.]

Re: 73 L48 headlight check valve/filter hoses

Thanks Jimmy.

Ok Jimmy, shortened the hose from filter to intake fitting. Looks fairly correct now I think. Tks. Doug 20220310_094149.jpg

[Jimmy P.]

Re: 73 L48 headlight check valve/filter hoses

Looks good! Save the piece you cut off no mater how short....never know when you'll need a piece with the white tracer!

[Douglas C.]

Re: 73 L48 headlight check valve/filter hoses

Looks good! Save the piece you cut off no mater how short....never know when you'll need a piece with the white tracer!

Yes, always save white tracer hose pieces over the years.

[Douglas C.]

Re: 73 L48 headlight check valve/filter hoses

Looks good! Save the piece you cut off no mater how short....never know when you'll need a piece with the white tracer!

Thanks Jimmy for pointing out the incorrect clamps on recovery hose to radiator. I do have the correct ones off the car, they were kinda grungy so cleaned them up and sanded. I have one extra from my old parts, and I think the smaller one is for the hose inside the recovery tank. See pics. I plan on painting with Rustoleum flat black primer, if that is the right look. I'll post when painted. Doug 20220310_162520.jpg

[Tom R.]

Re: 73 L48 headlight check valve/filter hoses

spring clamps were color coded by size, black (1/2" - 5/8"?), yellow (3/8"), red (1/4"), olive drab (1/2") and those look valuable given the edges are straight across. Sometime later, they became rounded...safety measure.

Springclamps.jpg

[Douglas C.]

Re: 73 L48 headlight check valve/filter hoses

spring clamps were color coded by size, black (1/2" - 5/8"?), yellow (3/8"), red (1/4"), olive drab (1/2") and those look valuable given the edges are straight across. Sometime later, they became rounded...safety measure.

[ATTACH=CONFIG]110694[/ATTACH]

My original clamps may be stretched slightly, inside measure for large ones is around 5/8", small one is around 1/2". See pic of fuel hose to pump, these look correct, square tips. Assume this is 3/8" fuel hose and 5/16 return. Doug 20220310_180804.jpg

[Tom R.]

Re: 73 L48 headlight check valve/filter hoses

My original clamps may be stretched slightly, inside measure for large ones is around 5/8", small one is around 1/2". See pic of fuel hose to pump, these look correct, square tips. Assume this is 3/8" fuel hose and 5/16 return. Doug

Yes! Absolutely.

[Jimmy P.]

Re: 73 L48 headlight check valve/filter hoses

Doug,
Those are pretty nice older originals, if you want to paint them to reuse them. I'm sure the previous owner had the correct clamps in the right spots!
Like Tom mentioned above they were different colors for size and application as you well know. Here's just a few originals from my collection.

[Douglas C.]

Re: 73 L48 headlight check valve/filter hoses

Doug,
Those are pretty nice older originals, if you want to paint them to reuse them. I'm sure the previous owner had the correct clamps in the right spots!
Like Tom mentioned above they were different colors for size and application as you well know. Here's just a few originals from my collection.

Yes, the ones I have are nice but they measure about 5/8" inside. The worn hose I took off between tank and radiator was thicker than the replacement I have now. Maybe the correct hose is larger and would fit the clamps I have? Doug