Think it’s time to pull the engine
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Fuel lines and plentium inserts came early today. I stayed after at the shop and replaced leaking fuel lines and added the inserts which space up the intake spider just enough to make the connection to the turbo a little rough. Noticed a new coolant leak has showed up for the party.
Fired up truck with no noticeable change, while waiting for engine to warm up I shut it off and ran another buzz test. Failed 1,3,5, 7. Jumped out and replaced the plug to the uvch. Fired truck back up and it ran way smoother than it has since this whole mess started, still knocking. By now it’s warm enough for perdels. Every cylinder is under 1 except for #8 which is at 2.25, and #3 is a 4.0.
I decide to drive it home to see if things will smooth out. Runs great at first, then the knock starts sounding funny and the pedal starts feeling like it’s moving away from me. Pretty soon I can’t maintain highway speed anymore, and now we’re costing.
pop the hood and coolant is everywhere. Idm code, two icp pressure codes, and p0340. Towed back to shop, good thing the rig I drove in this morning was still there. So... unsure at this moment where the truck stands, but I do know it’s testing my patience.
Fired up truck with no noticeable change, while waiting for engine to warm up I shut it off and ran another buzz test. Failed 1,3,5, 7. Jumped out and replaced the plug to the uvch. Fired truck back up and it ran way smoother than it has since this whole mess started, still knocking. By now it’s warm enough for perdels. Every cylinder is under 1 except for #8 which is at 2.25, and #3 is a 4.0.
I decide to drive it home to see if things will smooth out. Runs great at first, then the knock starts sounding funny and the pedal starts feeling like it’s moving away from me. Pretty soon I can’t maintain highway speed anymore, and now we’re costing.
pop the hood and coolant is everywhere. Idm code, two icp pressure codes, and p0340. Towed back to shop, good thing the rig I drove in this morning was still there. So... unsure at this moment where the truck stands, but I do know it’s testing my patience.
Thread Starter
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Junior User
Joined: May 2020
Posts: 60
Likes: 1
It blew the hose off the degas tank. Got it fired up just now, took a while to build icp, there is a lot of pressure coming out of the hose that blew of the tank and the knock is gone. Will check it out more later, seems like a blown head gasket.
Thread Starter
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Junior User
Joined: May 2020
Posts: 60
Likes: 1
cap can’t bleed off 35psi of boost fast enough.
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
Degas bottle has nothing to do with your boost...unless your boost is getting into your coolant, which would be indicative of a major problem.
Thread Starter
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Junior User
Joined: May 2020
Posts: 60
Likes: 1
yes that’s why I mentioned head gasket. There is exhaust coming out of the hose that is laying on the leaf spring that blew off the bottom of the degas bottle
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Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
7.3's aren't known for blowing head gaskets. Not saying it never happens or that can't be your problem but injector cups are definitely more common. Factor in that ICP pressure was slow to build, which a blown head gasket would have no effect on, it makes icups worth a look at least.
Cargo Master
Joined: Mar 2008
Posts: 2,975
Likes: 19
From: Archdale,N.C.
A 20 year old engine with 240k miles. Someone, either the PO or you have gotten your money's worth out of that engine. That knock is not going to heal up. Even if you do make a band aid repair at this point, you still have an engine that is run out.... The truck is at the point of it "nickle and diming" you to death. Next will be the transmission, differentials, steering and front end repairs. If you have a truck you are in Love with..... Rehab it from front to back. If not, sell it to someone who will restore it or just part it out.
Do you have the resources to make this kind of repair ? Mechanical ability, shop, money, time, etc?
Hobo
Do you have the resources to make this kind of repair ? Mechanical ability, shop, money, time, etc?
Hobo
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
I just gave my son my '99 7.3. It has 246xxx miles on it. It still runs like a sewing machine and very strong with no blowby from the oil fill cap. Reason I gave it to my son is because I bought myself a 2018 F350 DRW 6.7. My 6.7 only has 15xxx miles on it and if it was down to a 100% trust situation, I would choose the '99 246xxx mile 7.3 without question.
Thread Starter
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Junior User
Joined: May 2020
Posts: 60
Likes: 1
7.3's aren't known for blowing head gaskets. Not saying it never happens or that can't be your problem but injector cups are definitely more common. Factor in that ICP pressure was slow to build, which a blown head gasket would have no effect on, it makes icups worth a look at least.
Cargo Master
Joined: Mar 2008
Posts: 2,975
Likes: 19
From: Archdale,N.C.
Yes I did. I also reminded him that he's a lucky fxxxxr. Lol
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
Now that would bite.