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Old November 27th, 2010, 05:37 PM   #1
94transam25th
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Default First Cold Start of year and now oil leak!?

Ok so this is the first time its been cold by me and i wanted to see how the truck started when cold so i left it unplugged over night. I went to start it about 6am and it started right up but i noticed it started leaking quite a bit of oil

i havent had a chance to look at it in the light yet so i dont know where its coming from but any ideas on what i should check?

it never leaked a drop of oil before this

the trucks an 02 7.3

thanks,
Brandon
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Old November 27th, 2010, 05:40 PM   #2
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Mine was a tiny little o ring on the backside of the block. !0 cent part. Also have the 7.3
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Old November 27th, 2010, 05:45 PM   #3
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hmm hopefully thats what it is. i didnt notice it while running just when i got home i notice about a 6 inch diameter oil spot

do u have any idea what it was called?
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Old November 27th, 2010, 05:48 PM   #4
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My deisel guy is in highland, if you want his # i will pm it to you. Don't remember what he called it, but i had a hell of a lot more oil on the ground then that
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Old November 27th, 2010, 06:02 PM   #5
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Look in the valley between the heads, if its full of oil it's probably one of the hpop oil lines going to the heads. Cheap and easy fix but they can pour out a lot of oil quickly, these engines are notorious for it. Also make sure the fittings for the lines are tight in the hpop and heads as I have seen them come loose and leak. They sometimes start leaking slowly but will get worse over time. Oil can only run out a hole in the back of the block and usually looks like a rear main leaking but the 7.3's rarely leak at the rear main. Also look at the turbo base seals if its not the hpop lines leaking, they like to leak too.
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Old November 27th, 2010, 06:04 PM   #6
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look first. Ask questions later.
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Old November 27th, 2010, 06:21 PM   #7
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oil pans rot out on them also
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Old November 27th, 2010, 08:36 PM   #8
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hmm so i just went out and messed with it for awhile an still cant figure it out. I started the truck and ran it for prob 20 mins and didnt see a single drop leak. So i shut it down and then let it sit for about a half hour and no drips again

now i just let it warm up for about 10 minutes and then drove it a few blocks over to the park and let it run while i let my dog run, i got home parked it in the driveway again and now its leaking

im thinking now it could have something to do with the tubo because right underneath the "T" on the outlet of the turbo to the intercooler seems a little wet

if it were an HPOP problem wouldnt it be leaking toward the front of the motor?

thanks for the help guys
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Old December 2nd, 2010, 09:16 AM   #9
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Check the grill, if theres a blue oval on it,

its probably gunna leak.
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Old December 4th, 2010, 07:54 AM   #10
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Agree on the hpop line fitting and the rusted oil pans. There is an updated connector kit for at the pump. Watch out, like dzltech said if that leak wants to it can dump out oil like crazy.
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Old December 5th, 2010, 05:44 PM   #11
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Your exhaust back pressure valve actuator in the turbo pedestal could be leaking, or the pedestal o-rings themselves.

I have also seen the oil cooler o-rings leak only when cold, lower left side of the block, towards the front. Long cylinder shaped item.
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