I dont post here often but this is important. 4 years ago I sent my 348 in to a local independent service centre (highly recommended by the dealer who sold me the car many years ago) for a cam belt. I'm getting too old to tackle things like that anymore. When done, one of the items on the invoice was 'make up & fit new fuel lines - 2 metres @ £7.84 /m' I thought no more about it until a couple of days ago when I started the car up after a couple of months of disuse and there was an immediate smell of fuel. The impressive looking stainless steel braided pipe was spraying fuel over the exhaust manifold and cat. Fortunately as the exhaust was cold there was no fire. Had it been hot, this would have been the end of the car. I pressure tested the hose which had catastrophically failed. on dissection and examination the thin rubber liner was degraded, split and cracked. Cheap hose is not worth the risk. As a pilot, I'm familiar with Aeroquip hoses which are used for fuel and oil lines on aircraft and last for many years without degredation. Routine practice is to replace them at 10 years. Aeroquip 601 #6 hose with aviation certification is about £50 per metre and would be gold standard. It is also available from automotive suppliers without certification for £25 per metre - but be careful of fake Chinese hose. If genuine, this hose would be fine too. Hose at £7 a metre is not fit or safe to use on a Ferrari. Phil. Picture of offending hose and the liner stripped out of a section of pipe. Image Unavailable, Please Login Image Unavailable, Please Login
THIS!!! 100% this! I just replaced all the line in my 1971 Plymouth GTX becasue after a drive, it just smelled of fuel. Seems that Summit Racing's braided line isn't meant for ethanol fuels, in fact, it's "vapor permeable" and you should use teflon. Replaced everything with hardline and teflon, and problem solved. sjd
Teflon lined Aeroquip 666 is also a great choice - but I noticed that Ebay is full of 'teflon AN pipe' of uncertain origin. I would avoid that too. My point is hose from unknown manufacturers may not be all it seems. The hoses that failed looked identical to Aeroquip 601 but the construction under the nice braid is very different.
666 looks nice. This is what I prefer- https://www.pegasusautoracing.com/group.asp?GroupID=PLUMANFLEX If you haven't already you may want to check your injectors and have them flow tested. A lot of debris can get in there from the deteriorated lines.
Someone have part diagram for the hose in question? Are those hoses clamped or is there an AN fitting on them?
Image Unavailable, Please Login Image Unavailable, Please Login I had one fitting cracked on mine, so i machined new fittings of a bit beefier steel
Use the best hose you can get More crap pretty hoses today then ever before. Areoquip and goodrich are the only 2 I use. goodrich is an OEM to diesel sever duty for a reason, areoquip as your in the air.
Aircraft hoses fail too but I get what your saying. I had hydraulic hoses that the teflon would buldge out of the braid when they went bad, but hey fuel pressure isnt anywhere near those pressures not even close. Good thing it was cold.