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Old 09-24-2013, 01:39 PM
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2005 with fuel smell in cab and around truck

I can't find any leaks but I can smell the fuel after the truck has been run. I also am getting a smell through the deforster when I run it. What do I need to be looking for. Is there a common leak that I can fix myself or is it off to the stealer.Thanks.
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Old 09-24-2013, 03:14 PM
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Take a real close look at the fuel filter housing on top of engine. Most likely place for a leak. The o-ring is known for leaking at the cap. Should be dry up there so anything wet is most likely diesel.
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Old 09-24-2013, 03:32 PM
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and just below up front at the regulator housing seen here with all the arrows pointing to it

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Old 09-24-2013, 03:38 PM
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I had a leaking egr valve and man, you could smell it in the cab something fierce! So ya a leaking cap/o-ring would do the job real nice!
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Old 09-25-2013, 06:17 AM
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Thanks for the input, I am going to start looking under the hood this weekend and see what I can find.
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Old 09-25-2013, 06:35 AM
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Open the degas bottle cap and see if that's where the smell is coming from or if you see oily nasty in the coolant bottle.
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Old 09-25-2013, 06:41 AM
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there are plugs on the back of the cylinder heads, make sure fuel isn't coming out of there, had it happen on mine
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Old 09-25-2013, 06:43 AM
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Ok, checking the degas bottle for nasty oily stuff does not sound good. What issue would I be looking at if I were to find oily nasty crap in there or the odor of fuel was eminating from there............not good to leave me hanging like that man Thanks.
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Old 09-25-2013, 07:05 AM
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Quote:
Originally Posted by moralem View Post
Ok, checking the degas bottle for nasty oily stuff does not sound good. What issue would I be looking at if I were to find oily nasty crap in there or the odor of fuel was eminating from there............not good to leave me hanging like that man Thanks.
Sorry... Here is the long and short.

If there is diesel fuel in the cooling system, then you most likely have a crack in one of the cylinder heads. Now I hate to jump to conclusions, so lets start by looking for the obvious like the previous posts.

The fuel filter housing are on the top of the engine is the most likely spot for leaks, especially during climate change. The o rings shrink up and leak, which is most likely the issue.
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Old 09-25-2013, 07:17 AM
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I was thinking more of a leaking head gasket but a cracked cylinder head is bad news......The truck is not my daily driver so I just started to notice the smell on the weekends when I would use it for chores etc.....I will start with the basics and see what I come up with.....might be time for a new truck anyway with it being 8 years old and with a 175K miles on it.
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