05 Steamer
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
If the EGR cooler is clogged with casting sand and failing, then chances are the same problem is happening with the oil cooler. Just that the EGR cooler gets much hotter with the exhaust gas temps which then causes solder/welds to come loose hence the leaks. So, once you are in there doing one cooler you might as well do both so you dont have to go another weekend without your truck....
Fleet Owner
Joined: Nov 2003
Posts: 27,929
Likes: 3,651
Do the check for EGR cooler leak by jacking the back end up and removing th EGR valve. If it is wet below the EGR valve, your EGR cooler has leaked. It is a fairly big job to replace it. Only you can decide whether it is in your skill set or not. I will look for instructions on replacing the EGR cooler. If it is the EGR cooler leaking, then driving the vehicle can result in hydrolocking your engine and doing major damage. Simply unplugging the EGR valve does not prevent further damage.
The oil cooler passages (coolant side) are small. They plug easily. When it plugs, it starves the EGR cooler from coolant flow and it fails due to excessive heat. Then you have coolant pouring into the intake and exhaust. You may not HAVE to replace the oil cooler, but it should be pulled and checked for pluggage at a minimum.
The oil cooler passages (coolant side) are small. They plug easily. When it plugs, it starves the EGR cooler from coolant flow and it fails due to excessive heat. Then you have coolant pouring into the intake and exhaust. You may not HAVE to replace the oil cooler, but it should be pulled and checked for pluggage at a minimum.
Fleet Mechanic
Joined: Jan 2007
Posts: 1,708
Likes: 7
From: Circle City
The emissions circuit should be a zero deductible when you take it to the dealer for repair and if it falls within 100,000 miles.
to the OP,
You need to remove the egr valve not just unplug it.
it is held by a couple of bolts, once you pull the valve out look inside the intake and see if it looks wet. First park the truck so the rear tires are significantly higher than the front tires. Gravity will move any liquid to your inspection hole which is the removed egr valve.
to the OP,
You need to remove the egr valve not just unplug it.
it is held by a couple of bolts, once you pull the valve out look inside the intake and see if it looks wet. First park the truck so the rear tires are significantly higher than the front tires. Gravity will move any liquid to your inspection hole which is the removed egr valve.
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