Proper fuel line hose?

General discussion forum for J30 and M30 owners!
JFerieY32
Posts: 5
Joined: Wed Mar 03, 2010 12:22 pm
Car: 1993 Infiniti J30

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So I started up my 93 J30t several weeks back in the cold to let it warm up and came back a couple of minutes later to a strong smell of gasoline. I looked underneath the car and saw fuel pouring out of the bottom on the right. I turned off the engine quickly in a half-panic afraid it could go up in flames at any moment. Fortunately, it didn't. Pushed the car back a bit and cleaned up the gas in the driveway.

I assumed that I needed to perform the cold weather fuel line check procedure but decided to let the car sit (its a second car) until the weather warmed up to be sure. Well, today we got nice temps in the upper 70s and I had a little time. I got most of the fuel line clamps tightened up and decided to do a test. So I started it up, walked around to look under the hood to check for leaks...and was horrified to see a strong stream of fuel spewing out of a burst hose. I mean, I could hear a ringing noise from the sound of the fuel hitting against metal. :ohno: So once again I run to shut off the engine before everything goes up in flames. And again, I'm fortunate that there was no fire. But, I had the culprit. The hose was marked SAE30R6 KX and was leading off of the fuel filter to the engine. After checking it out on the internet I'm not sure that this hose ever should have been used on a fuel-injected engine and I want to use the proper hose type for replacement of this roughly foot long section. Otherwise it looks like an easy repair. I'm a slightly advanced novice on car repair but not afraid to do things myself since my J30 is a very old but still fairly decent secondary car.

Some history: [My original engine died 4 years ago (258K mi) and just a couple of sad days before the J30t was to depart to its final resting place I received an great (i.e. $$ cheap) offer to replace the engine with a used one. Payment in advance of course. 14 months later I actually get the car back with the used engine after showing up to the shop several times unannounced with expletive laced encouragement. So I have no doubt corners were cut to complete the job.]

Any recommendations or advice on hose for fuel lines? Thanks.


jertapper
Posts: 142
Joined: Sun Mar 18, 2007 3:55 pm
Car: 1996 J30
Location: Mobile, AL

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I had a leak too and it would stink inside the car from the fumes. I tried to tighten my clamps, but that did nothing. It finally got bad enough that I could see it so I knew where to change out the hose. I did more research and bought enough hose and replaced them all (and the fuel pressure regulator).

The hose is 8mm but 5/16 is close enough. Here is the OEM stuff if you want to pay that much (http://www.conceptzperformance.com/Cart ... ype=NIS300). I got a few feet from Autozone of HIGH PRESSURE FUEL LINE, 5/16 inch.

It's not too hard of a job if you know which piece you need to replace (but you should probably do them all) but definitely first do the leaking one.

Don't forget to pull the fuel pump fuse and let her run until she dies and crank her a few more times.

GerryO
Posts: 974
Joined: Fri Feb 09, 2007 11:47 am
Car: 1993 J30t
Pearl White
Black Interior

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The OEM stuff is expensive, but really good. Remove the gas cap too and don't leave the car parked in the sun, while you have fuel lines disconnected.

JFerieY32
Posts: 5
Joined: Wed Mar 03, 2010 12:22 pm
Car: 1993 Infiniti J30

Post

jertapper wrote:I had a leak too and it would stink inside the car from the fumes. I tried to tighten my clamps, but that did nothing. It finally got bad enough that I could see it so I knew where to change out the hose. I did more research and bought enough hose and replaced them all (and the fuel pressure regulator).

The hose is 8mm but 5/16 is close enough. Here is the OEM stuff if you want to pay that much (http://www.conceptzperformance.com/Cart ... ype=NIS300). I got a few feet from Autozone of HIGH PRESSURE FUEL LINE, 5/16 inch.

It's not too hard of a job if you know which piece you need to replace (but you should probably do them all) but definitely first do the leaking one.

Don't forget to pull the fuel pump fuse and let her run until she dies and crank her a few more times.
Thanks for the advice and the link. The diagram is awesome. I think I will be replacing all of the hose.

JFerieY32
Posts: 5
Joined: Wed Mar 03, 2010 12:22 pm
Car: 1993 Infiniti J30

Post

GerryO wrote:The OEM stuff is expensive, but really good. Remove the gas cap too and don't leave the car parked in the sun, while you have fuel lines disconnected.
Thanks also. The advice and experience here on NICO is hard to beat.


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