Can anyone tell me where the fuel lines on my 66 Riviera are supposed to be run??? On my car - from the gas tank - the steel lines run on the outside of the frame rail until just before the front cross member - they then transition to rubber and into the inside of the frame rail and through the spring pocket. They then come out the front cross member into the engine compartment - and run to the fuel pump. To me, this is incorrect. I think they should run on the inside of the frame rail and be steel until they get to the engine compartment and then transition to rubber. Am I right or wrong??? Thanks, 66rivigeezer
Full66 manual will be added to the ALL Buicks libraries http://buick-libraries.boattail-riviera-by-buick.com/ When I get around to bookmarking it ( a few books in line before that one) but here's the fuel system page. looks like its shows pipe with transition to hose would be at point B as you thought.
That is how its set up on my 68. In fact when I got the car someone had taking copper and zip tied it to the outside of the cross member then to the pump. When I had the engine out I reinstalled the soft lines in the correct location.
What you have now may not be the correct routing for '66 Riviera rubber portion of the fuel line, as it differs from Rob's scan of the fuel system diagram, but that's how it's done on '67 and '68 Rivieras - by doing it that way, the rubber portion of the fuel lines have much less open exposure, and are well protected inside the frame rails before it attaches to the fuel pump. :TU:
The description of the routing on his car seems to match the '66 diagram as I see it. :bglasses: I don't recall my '66 having that return line though. Was that California emissions?
According to the diagram it has one Dale, although the lines in the drawing are hard to follow - the fuel line does run through the frame to the fuel pump, but the return line from the fuel filter, appears to be routed externally, and not inside the frame. I think the '66 Riv nailheads only had one line on the fuel pump, and the return line ran from the fuel filter, where '67 - '69 ?? 430s had two lines on the fuel pump - one feeding the pump and the other was the return line, as the fuel filter was part of the Q'jet carb., and both those rubber lines were routed through the frame. o No:
thats the only diagram in the 66 manual for Riviera - it does specify w A/C ? Did yours have A/C it says in the description On all air conditioner equipped cars, a vapor by-pass system is installed. These cars have either a special tee (V-6) or a special fuel filter which has a metering outlet. See Figure 80-6. All vapor which forms is bled off and returned to the gas tank through a separate line. This system greatly reduces any possibility of vapor lock.
heres the 67 chassis manual page Rivmans comment "by doing it that way, the rubber portion of the fuel lines have much less open exposure, and are well protected inside the frame rails" makes good sense to me if you wanted a better way then it was originally done. Looks GM figured out for 67 on that it was better -- If i had 66-69 service bulletins ( 65,70 thru 73 are in the works) for the libraries I check for this change.
My 66 and another original I looked at had both rubber lines entering the frame by the front body mount and running through the clamp inside the spring housing like explained in the first post. Not sure if this change was made before production or some time during the model year. The manual is incorrect in my case but who knows on earlier cars. The clamp in my spring housing is definitely designed to hold two different size hoses. Very typical that when originals were replaced the new lines were not run through the spring housing due to difficulty in doing so. The difficulty in getting at this clamp one has to wonder if the engineers thought the hoses would last the life of the car......they probably did in some cases.
I would like to thank everyone for sharing their knowledge on this subject. Keep up the good work!!! I looked at my '66 Riviera again and sure enough it has the same type clamp holding the two rubber lines - just like I see in JZRIV's photo. My clamp looks factory - it doesn't look like an aftermarket universal clamp at all. What started this thread was my rubber lines were deteriorated so badly that the last time I started the engine - gas was spewing out the cracks in the rubber!!! I am going to replace the rubber lines where they are and make sure the steel line is adequately clamped down. I don't plan on driving this car on gravel roads so it should be ok. I am going to look at other 66's as I come across them and then make a decision later whether to change the routing or not. Thanks again so much for everyone's help!!! 66rivigeezer.
I have the same question the drawing is not very helpful there are two hose connections on the one front and one rear which one goes to the carb I would assume the front one but I'm running hard line and don't want to do it twice
