Howdy Guys
I thought i would share this with the board and get some feedback...... This is a friends car that i'm trying help fix .......
This Engine was built a couple of yrs ago . The engine is a 109 block with 2 steel center caps. A steel stock stroke crank. The Rods are Stock rods worked with arp bolts than are full floating pins. The pistons are weisco.. The cam is a cast roller unit.
The Front cover was built up using the Tall gears and the spacer for a stock gm cover.
When the engine was broke in The oil pressure was in the 60 psi range hot with the engine at about 2-2400 rpms.
The engjne was installed in the car and run great (still does) and after a few thousand miles it started losing oil pressure. Hot idle was less than 5 psi.
So i got the car and started doing some investigating on the oil pressure loss. The first place i looked was at the oil pump itself. So i removed it from the engine. The pump gears have about .0015 clearance and doing a flow test on the pump revealed nothing wrong with the pump itself.
I also removed the cam gear to see if the oil galley plugs had maybe came out. Well they were in place and staked in.........
WELL WHAT TO LOOK AT NOW...........
The next logical place to look is the Main bearings ( removing the oil filter and cutting it open showed nothing) . So i removed the oil pan and pulled the 2 steel caps and checked those bearings and they showed hardly any wear at all.......WTF is going on here.........
So after some thinking and smelling smoke......
I decided to take a air gun and pressurize the oil passage ways to see if i can possibly hear where the biggest leak is...... Well this helped me big time.....What i found was the Air was leaking big time around the #2 cam bearing area...So now that i had a place to start looking. I grabbed the small inspection camera and did some proctology work and found that the cam bearing had came loose towards the front of the engine to be stopped by the cam lobe........
So my question is how did this happen.....Is this block repairable ?
Here is a pic of said bearing...........
I thought i would share this with the board and get some feedback...... This is a friends car that i'm trying help fix .......
This Engine was built a couple of yrs ago . The engine is a 109 block with 2 steel center caps. A steel stock stroke crank. The Rods are Stock rods worked with arp bolts than are full floating pins. The pistons are weisco.. The cam is a cast roller unit.
The Front cover was built up using the Tall gears and the spacer for a stock gm cover.
When the engine was broke in The oil pressure was in the 60 psi range hot with the engine at about 2-2400 rpms.
The engjne was installed in the car and run great (still does) and after a few thousand miles it started losing oil pressure. Hot idle was less than 5 psi.
So i got the car and started doing some investigating on the oil pressure loss. The first place i looked was at the oil pump itself. So i removed it from the engine. The pump gears have about .0015 clearance and doing a flow test on the pump revealed nothing wrong with the pump itself.
I also removed the cam gear to see if the oil galley plugs had maybe came out. Well they were in place and staked in.........
WELL WHAT TO LOOK AT NOW...........
The next logical place to look is the Main bearings ( removing the oil filter and cutting it open showed nothing) . So i removed the oil pan and pulled the 2 steel caps and checked those bearings and they showed hardly any wear at all.......WTF is going on here.........
So after some thinking and smelling smoke......
I decided to take a air gun and pressurize the oil passage ways to see if i can possibly hear where the biggest leak is...... Well this helped me big time.....What i found was the Air was leaking big time around the #2 cam bearing area...So now that i had a place to start looking. I grabbed the small inspection camera and did some proctology work and found that the cam bearing had came loose towards the front of the engine to be stopped by the cam lobe........
So my question is how did this happen.....Is this block repairable ?
Here is a pic of said bearing...........
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