- My Forums
- Tiger Rant
- LSU Recruiting
- SEC Rant
- Saints Talk
- Pelicans Talk
- More Sports Board
- Fantasy Sports
- Golf Board
- Soccer Board
- O-T Lounge
- Tech Board
- Home/Garden Board
- Outdoor Board
- Health/Fitness Board
- Movie/TV Board
- Book Board
- Music Board
- Political Talk
- Money Talk
- Fark Board
- Gaming Board
- Travel Board
- Food/Drink Board
- Ticket Exchange
- TD Help Board
Customize My Forums- View All Forums
- Show Left Links
- Topic Sort Options
- Trending Topics
- Recent Topics
- Active Topics
Started By
Message
Duramax owners...help!
Posted on 10/21/15 at 10:04 am
Posted on 10/21/15 at 10:04 am
I have a 2003 Duramax (LB7). It's currently hard to start and sometimes losing prime over night requiring about 5-10 pumps on the hand primer. The Wix filter is relatively new but not brand new (probably less than a year old, but I'm not 100% sure).
I read the multitudes of posts on the diesel forums regarding the fuel heater electrical connector o-ring failure resulting in a leak. I dried that off last night and primed up the system. There was a glistening of fuel from that connector...not really even a weep, but definitely not dry.
Do the OB Duramax owners think this is enough to cause the system to lose prime over night?
I read the multitudes of posts on the diesel forums regarding the fuel heater electrical connector o-ring failure resulting in a leak. I dried that off last night and primed up the system. There was a glistening of fuel from that connector...not really even a weep, but definitely not dry.
Do the OB Duramax owners think this is enough to cause the system to lose prime over night?
7
Posted on 10/21/15 at 11:13 am to NASA_ISS_Tiger
Check the o ring under the primer pump itself. Had same problem with mine and eventually died and wouldn't crank at all. Luckily was at tractor dealer and was able to find similar o ring in there shop. Put it on and not a problem since.
Posted on 10/21/15 at 12:29 pm to NASA_ISS_Tiger
Fuel filter housing probably leaking. Mine (06) went out at 200,000+ miles. Was told it is/was common on older models. Under $200.00 to get the whole thing replaced and fixed.
Posted on 10/21/15 at 12:30 pm to Run up middle
quote:
the o ring under the primer pump itself.
i like your solution better
Posted on 10/21/15 at 12:51 pm to NASA_ISS_Tiger
Yeah talked with a diesel mechanic up here and I'm gonna go buy the rebuild kit at the local store (only $24) and let him rebuild that housing (seals). He informed me too that little bit of weepage was enough to cause what I was experiencing.
I'd do the work myself but I'm still recovering from hand surgery on my dominant hand...so $200 will be well spent on that.
I'd do the work myself but I'm still recovering from hand surgery on my dominant hand...so $200 will be well spent on that.
Posted on 10/21/15 at 1:21 pm to NASA_ISS_Tiger
I had a 2008 duramax for 4 years and experienced a similar problem. It turned out to be a cracked water in fuel sensor in the bottom of my fuel filter that was allowing air into the system and creating the hard starting. I also had some glow plug failures that would cause hard to start scenarios. Merchant automotive sold a solid billet plug that replaced the fuel sensor for much cheaper than a replacement sensor.
Posted on 10/21/15 at 2:05 pm to bayoudude
quote:
I had a 2008 duramax for 4 years and experienced a similar problem. It turned out to be a cracked water in fuel sensor in the bottom of my fuel filter that was allowing air into the system and creating the hard starting. I also had some glow plug failures that would cause hard to start scenarios. Merchant automotive sold a solid billet plug that replaced the fuel sensor for much cheaper than a replacement sensor.
Yeah I'd go that route too...especially since I'm seeing the WIF doesn't work a lot of times.
Posted on 10/21/15 at 6:10 pm to NASA_ISS_Tiger
cracked WIF most likely...but could be the filter head needing a rebuild.
I would NOT recommend the use of Wix filters on a Dmax...Seriously!
The Factory filters are the best for this application.
Plastic fuel filters(Wix/Napa)could be your problem as well...they have been known to leak air and or crack.
I would NOT recommend the use of Wix filters on a Dmax...Seriously!
The Factory filters are the best for this application.
Plastic fuel filters(Wix/Napa)could be your problem as well...they have been known to leak air and or crack.
Posted on 10/21/15 at 8:38 pm to NASA_ISS_Tiger
Replace the filter housing assembly and don't look back it has a new filter and wif sensor already on it, get the universal assembly with the adjustable fuel fittings and replace the lines also I have replaced a truck load of these over the years.
Wix makes a good filter but they are too small and don't last as long (they plug up faster) than the a/c delco filter.
Wix makes a good filter but they are too small and don't last as long (they plug up faster) than the a/c delco filter.
Posted on 10/21/15 at 9:00 pm to 300HOGSLAYER
Rebuild the fuel filter housing assembly and then install an adapter for the Cat 2 micron filters and your problem is solved. Get rid of that crap WIF sensor! I've got an '04 and have been running mine like this for a long time. The 2 micron filter will help your injectors to last longer as well!
Posted on 10/22/15 at 12:02 am to Pepperidge
Agreed on the filters. I always used factory brand, or Racor (who I believe makes the factory filter) when I had a Duramax.
Posted on 10/22/15 at 7:12 am to NASA_ISS_Tiger
Check the O-ring. If that isn't the problem, your fuel filter housing is the problem. Common problem in the Duramax. Mine was $500 to repair.
Posted on 11/3/15 at 3:19 pm to 3deadtrolls
Where do you get Racor filters? Online distributor?
Page 1 of 1
Popular
Back to top
Follow TigerDroppings for LSU Football News