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post #1 of 9 Old 10-11-2013, 05:49 PM Thread Starter
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Coolant leak?

I just dropped this freshly rebuild motor into my truck a month ago. I've put about 2500 miles on the new engine. For the first 1500-1750 I was leak free. Now I seem to have a coolant leak. It looks like it is coming out where the oil cooler meets the block at the front of the motor. I rebuilt the cooler and the cooler itself doesn't seem to be leaking. I double checked the 2 bolts holding the cooler to the block and they are TIGHT...




1997 F350
Mahle Ceramic Coated Pistons (De-lipped), Billet Crower Connecting Rods, DI Chromoly Push Rods, Beehive Valve Springs, Fire Ring Headgaskets, ARP Head Studs, Mike's Main Girdle, Melling LPOP, Terminator Dual HPOP, 300/200 Injectors, Dual SD Fuel Pumps, Billet Aluminum Intake Plenums, 6.0 Mishimoto Intercooler, Compound Turbos (Primary = 62/68 & Atmospheric 82/88), John Wood Tranny, 4921 Transmission Cooler, Batteries Relocated to Bed
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post #2 of 9 Old 10-12-2013, 07:08 AM Thread Starter
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Anyone have any ideas? :/



1997 F350
Mahle Ceramic Coated Pistons (De-lipped), Billet Crower Connecting Rods, DI Chromoly Push Rods, Beehive Valve Springs, Fire Ring Headgaskets, ARP Head Studs, Mike's Main Girdle, Melling LPOP, Terminator Dual HPOP, 300/200 Injectors, Dual SD Fuel Pumps, Billet Aluminum Intake Plenums, 6.0 Mishimoto Intercooler, Compound Turbos (Primary = 62/68 & Atmospheric 82/88), John Wood Tranny, 4921 Transmission Cooler, Batteries Relocated to Bed
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post #3 of 9 Old 10-12-2013, 08:02 AM Thread Starter
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Coolant only leaks when motor is warm and is off. Checked the Tstat housing and it is dry as a bone.
It doesn't look like a bad oil cooler o-ring but it's hard to see up in there.



1997 F350
Mahle Ceramic Coated Pistons (De-lipped), Billet Crower Connecting Rods, DI Chromoly Push Rods, Beehive Valve Springs, Fire Ring Headgaskets, ARP Head Studs, Mike's Main Girdle, Melling LPOP, Terminator Dual HPOP, 300/200 Injectors, Dual SD Fuel Pumps, Billet Aluminum Intake Plenums, 6.0 Mishimoto Intercooler, Compound Turbos (Primary = 62/68 & Atmospheric 82/88), John Wood Tranny, 4921 Transmission Cooler, Batteries Relocated to Bed

Last edited by Pwnm30rdi3; 10-12-2013 at 08:15 AM.
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post #4 of 9 Old 10-12-2013, 09:38 AM
over thinking everything
 
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Clean the area look from the top to see if any coolant is leaking above where you're seeing the leak. I'd also use a pressure tester as well and check in front of the leak incase the fan was blowing the leak backwards

97 F-250 CCSB 4x4 7.3 E40D 305,000 miles 285/75/16 Cooper Discoverer at3s' diy 6637 intake diamond eye 4in stainless turbo back straight pipe auto meter pyro, trans temp and boost gages on triple a pillar pod baby swamps and php hydra chip - paid off 335hp 704tq currently getting 12.5 mpg hwy


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Don't mind JJ, he lives near Santa, but uses a powerstroke instead of reindeer
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post #5 of 9 Old 10-12-2013, 01:27 PM Thread Starter
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Originally Posted by fordmandan87 View Post
Clean the area look from the top to see if any coolant is leaking above where you're seeing the leak. I'd also use a pressure tester as well and check in front of the leak incase the fan was blowing the leak backwards
Did some more investigating. The leak is in fact coming from where the oil cooler meets the block.

If I wipe off the oil cooler neck where the coolant is collecting (with engine off), coolant appears seconds later. I hope I didn't crack anything. Any tips on removing this bad boy?
When I rebuilt the oil cooler, it was out of the truck.



1997 F350
Mahle Ceramic Coated Pistons (De-lipped), Billet Crower Connecting Rods, DI Chromoly Push Rods, Beehive Valve Springs, Fire Ring Headgaskets, ARP Head Studs, Mike's Main Girdle, Melling LPOP, Terminator Dual HPOP, 300/200 Injectors, Dual SD Fuel Pumps, Billet Aluminum Intake Plenums, 6.0 Mishimoto Intercooler, Compound Turbos (Primary = 62/68 & Atmospheric 82/88), John Wood Tranny, 4921 Transmission Cooler, Batteries Relocated to Bed
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post #6 of 9 Old 10-12-2013, 08:42 PM Thread Starter
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I believe I found my culprit. I pulled everything apart and made a huge mess. After I got everything cleaned off I couldn't find anything that may have caused my leak. Then I took a closer look at my gasket and found this!




1997 F350
Mahle Ceramic Coated Pistons (De-lipped), Billet Crower Connecting Rods, DI Chromoly Push Rods, Beehive Valve Springs, Fire Ring Headgaskets, ARP Head Studs, Mike's Main Girdle, Melling LPOP, Terminator Dual HPOP, 300/200 Injectors, Dual SD Fuel Pumps, Billet Aluminum Intake Plenums, 6.0 Mishimoto Intercooler, Compound Turbos (Primary = 62/68 & Atmospheric 82/88), John Wood Tranny, 4921 Transmission Cooler, Batteries Relocated to Bed
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post #7 of 9 Old 10-12-2013, 09:00 PM
over thinking everything
 
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That sucks are you planning on changing the oil after everything is back together?

97 F-250 CCSB 4x4 7.3 E40D 305,000 miles 285/75/16 Cooper Discoverer at3s' diy 6637 intake diamond eye 4in stainless turbo back straight pipe auto meter pyro, trans temp and boost gages on triple a pillar pod baby swamps and php hydra chip - paid off 335hp 704tq currently getting 12.5 mpg hwy


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Originally Posted by 351fifty View Post
Don't mind JJ, he lives near Santa, but uses a powerstroke instead of reindeer
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post #8 of 9 Old 10-12-2013, 09:39 PM Thread Starter
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Quote:
Originally Posted by fordmandan87 View Post
That sucks are you planning on changing the oil after everything is back together?
Yeah! I'm almost at my 3000 mile oil change marker anyways



1997 F350
Mahle Ceramic Coated Pistons (De-lipped), Billet Crower Connecting Rods, DI Chromoly Push Rods, Beehive Valve Springs, Fire Ring Headgaskets, ARP Head Studs, Mike's Main Girdle, Melling LPOP, Terminator Dual HPOP, 300/200 Injectors, Dual SD Fuel Pumps, Billet Aluminum Intake Plenums, 6.0 Mishimoto Intercooler, Compound Turbos (Primary = 62/68 & Atmospheric 82/88), John Wood Tranny, 4921 Transmission Cooler, Batteries Relocated to Bed
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post #9 of 9 Old 10-13-2013, 11:14 AM Thread Starter
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Finished putting everything back together today.
Bought more coolant... Again
and did my oil change!



Made a huge mess in my driveway, but my leak is fixed and the truck is up and running again! Yay!



1997 F350
Mahle Ceramic Coated Pistons (De-lipped), Billet Crower Connecting Rods, DI Chromoly Push Rods, Beehive Valve Springs, Fire Ring Headgaskets, ARP Head Studs, Mike's Main Girdle, Melling LPOP, Terminator Dual HPOP, 300/200 Injectors, Dual SD Fuel Pumps, Billet Aluminum Intake Plenums, 6.0 Mishimoto Intercooler, Compound Turbos (Primary = 62/68 & Atmospheric 82/88), John Wood Tranny, 4921 Transmission Cooler, Batteries Relocated to Bed
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