Took my first whack at taking engine dimensions.
Took my first whack at taking engine dimensions. Due to time constraints I was only able to take the Main Bearing measurements. I installed the bearings (King +1), torqued the ARP Main Studs to spec (60 ft/lb inner, 60 ft/lb outter) and used telescoping gauges (top to bottom) and the Jegs .0001 2-3 inch mic. These were my measurements;
1]2.5609
2]2.5405
3]2.5593
4]2.5546
5]2.5602
Do these measurements look correct? I used this link to learn to read the Mic (http://www.pgiinc.com/pages/How-to-r...icrometer.html) very tedious it was.
I'll be mic'ing the crank tomorrow, what's the desired clearance (bearing - journal = clearance) for a turbo motor? 0.0025-27?
1]2.5609
2]2.5405
3]2.5593
4]2.5546
5]2.5602
Do these measurements look correct? I used this link to learn to read the Mic (http://www.pgiinc.com/pages/How-to-r...icrometer.html) very tedious it was.
I'll be mic'ing the crank tomorrow, what's the desired clearance (bearing - journal = clearance) for a turbo motor? 0.0025-27?
TECH Fanatic
Joined: Jun 2011
Posts: 1,343
Likes: 8
From: Katy, TX
Your main bore dimensions for #2 and #4 look too low. For example, #2 is ~0.020" smaller than #1, which doesn't sound good. I would try to measure 2 and 4 again, on both sides of the oil galley, 90-deg from the bearing parting line.
If you don't get better measurements, I would look at getting a dial bore gauge.
Here is what I got when I measured with a dial bore gauge:
#1: 2.5607 - 2.5608
#2: 2.5615 - 2.5616
#3: 2.5608 - 2.5611
#4: 2.5609 - 2.5610
#5: 2.5609 - 2.5610
These were all with clevite H bearings in my iron block, line honed mains with arp studs (inner studs at 62 lb-ft and outer studs at 52 lb-ft per my machinist's recommendation).
I ended up running clevite HX bearings (lower half shell only) on 1,3,4, and 5 to get my clearance to match that of #2 (0.0028" - 0.0032").
I would recommend 0.0018 - 0.0020" clearance if you have an aluminum block.
However you work it out, just be sure that your crankshaft spins smoothly by hand after installing it and torquing the mains. Mine had less than 2 lb-ft resistance, smooth as glass.
Good luck with the measurements, post pics if you can!
If you don't get better measurements, I would look at getting a dial bore gauge.
Here is what I got when I measured with a dial bore gauge:
#1: 2.5607 - 2.5608
#2: 2.5615 - 2.5616
#3: 2.5608 - 2.5611
#4: 2.5609 - 2.5610
#5: 2.5609 - 2.5610
These were all with clevite H bearings in my iron block, line honed mains with arp studs (inner studs at 62 lb-ft and outer studs at 52 lb-ft per my machinist's recommendation).
I ended up running clevite HX bearings (lower half shell only) on 1,3,4, and 5 to get my clearance to match that of #2 (0.0028" - 0.0032").
I would recommend 0.0018 - 0.0020" clearance if you have an aluminum block.
However you work it out, just be sure that your crankshaft spins smoothly by hand after installing it and torquing the mains. Mine had less than 2 lb-ft resistance, smooth as glass.
Good luck with the measurements, post pics if you can!
thannks fellas, wait on a bore gauge to come in, here's a few pics;
taking off the main caps
caps, bearings, nuts
Bearings installed
Me looking like I know what I'm doing
I think I'm going to have a pro come and do the bearing clearances for me, 6.0 turbo motor & I really don't want to muck it up too badly.
taking off the main caps
caps, bearings, nuts
Bearings installed
Me looking like I know what I'm doing
I think I'm going to have a pro come and do the bearing clearances for me, 6.0 turbo motor & I really don't want to muck it up too badly.
