Cracked block.
Thread Starter
|
Elder User
Joined: Feb 2010
Posts: 724
Likes: 0
Cracked block.
How can you check for a cracked engine block?
I'm asking cause I finally got my truck home today and it was sitting in my yard and some guy stopped at my house and starts telling me how his friend use to own the truck!
Well we sat there and talked awhile and then he told me that last he knew the truck had two bad head gaskets and a cracked engine block.
(I was told by the guy who sold it to me that it had two bad head gaskets, but he said nothing about a cracked block)
So I just want to check it out before I do much more to it.
If I find out it has a cracked block one of two things will happen, #1 sell the truck or #2 put in a 6.9
I'm asking cause I finally got my truck home today and it was sitting in my yard and some guy stopped at my house and starts telling me how his friend use to own the truck!
Well we sat there and talked awhile and then he told me that last he knew the truck had two bad head gaskets and a cracked engine block.
(I was told by the guy who sold it to me that it had two bad head gaskets, but he said nothing about a cracked block)
So I just want to check it out before I do much more to it.
If I find out it has a cracked block one of two things will happen, #1 sell the truck or #2 put in a 6.9
Thread Starter
|
Elder User
Joined: Feb 2010
Posts: 724
Likes: 0
Not yet, I still have to rebuild the oil cooler, but I was wanting to find out if the block is ok before I did that.
Post Fiend
Joined: Oct 2008
Posts: 8,513
Likes: 2
From: concord ca
idt ur block is cracked test ur compression frist and go form there if u have a dead cyclearnd u know or get a rad perhure tester and see if it leakes
Trending Topics
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
7.3's are more likely to develop pin holes in the cylinder walls then crack.
The best way to test for cylinder leakage problems is to remove the rockers, remove the Glow Plugs, then air charge each cylinder watching for bubbles in the radiator.
Warning! The motor will turn over as you are applying the air charge as it pushes the piston to the bottom of it's stoke, to get a good proper test the piston must be at BDC.
-Enjoy
fh : )_~
The best way to test for cylinder leakage problems is to remove the rockers, remove the Glow Plugs, then air charge each cylinder watching for bubbles in the radiator.
Warning! The motor will turn over as you are applying the air charge as it pushes the piston to the bottom of it's stoke, to get a good proper test the piston must be at BDC.
-Enjoy
fh : )_~
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Postmaster
Joined: Jan 2010
Posts: 4,319
Likes: 4
From: Elk City, OK
x2 on festus, but adding you should squirt some oil into the cylinder first. that will help the air from escaping past your rings and help give you a more positive picture on leaking areas. the procedure is called a leak down test.
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
The problem with squirting oil in a precupped V8 is the oil will never get on the Higher 2/3 of the cylinder bore!
It will just puddle on the low side!
In a V8 gasser you squirt the oil to the high side of the piston and allow it to run around the bore.
-Enjoy
fh : )_~
It will just puddle on the low side!
In a V8 gasser you squirt the oil to the high side of the piston and allow it to run around the bore.
-Enjoy
fh : )_~
Thread Starter
|
Elder User
Joined: Feb 2010
Posts: 724
Likes: 0
That's the funny thing, this truck has NO oil or coolant leak at all!
Beats me, maybe the guy was just full of ****.
So anyways I'm just going to fill the oil up and run the truck and see what happens, the worst it could do it trash the engine and if it already had a crack that's no big deal, or it could run just fine.
I can tell you right now though, this is the last time I buy a truck with out knowing the full story behind it.
Thanks for all your input guys!
Beats me, maybe the guy was just full of ****.
So anyways I'm just going to fill the oil up and run the truck and see what happens, the worst it could do it trash the engine and if it already had a crack that's no big deal, or it could run just fine.
I can tell you right now though, this is the last time I buy a truck with out knowing the full story behind it.
Thanks for all your input guys!
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
A blown head gasket or cracked block would probably put coolant in the oil long before it put oil in the coolant.
Do the test with shop air in the glow plug hole and the rockers removed.
Before you apply air pressure to the cylinder, fill the radiator completely full.
When you put air pressure in the bad cylinder/s, the water will overflow.
If you don't get the water running out of the radiator, the problem is somewhere else.
If you do get water running out of the radiator, you know which cylinder/s you need to concentrate on with the inspection when you tear it down.
As you clean up the head gasket area, you can see a crack.
Do the test with shop air in the glow plug hole and the rockers removed.
Before you apply air pressure to the cylinder, fill the radiator completely full.
When you put air pressure in the bad cylinder/s, the water will overflow.
If you don't get the water running out of the radiator, the problem is somewhere else.
If you do get water running out of the radiator, you know which cylinder/s you need to concentrate on with the inspection when you tear it down.
As you clean up the head gasket area, you can see a crack.
