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Coolant loss (Updated with Oil Analysis
I have had my 08' F250 for a little over a month now and I'm trying to track down where I might be loosing coolant from.
A little background on the coolant loss, I purchased the truck and failed to detect that the degauss bottle was completely empty from coolant (huge oversight on my part). Since it still has the Ford Gold in the system, I went to the dealership and bought a gallon to replenish the system. Come to find out, it was over a gallon low on coolant.
After filling it up, I monitored the system to see where it could be loosing coolant from. I found the hose that connects the vertical and horizontal EGR coolers together leaking slightly. I tightened that up and thought that would have been the remedy for my coolant loss. Since adding the coolant back, I have driven a little over 1,000 miles (truck has 113k miles on it) and when I checked this morning I noticed that the level had dropped approximately 1/4 on the degauss bottle. I haven't found any leaks other than the one I previously mentioned.
Does this sound like a symptom of an EGR cooler failing? Is there any way to troubleshoot this to be the case? The truck came with an STC tuner and I just recently changed from the Performance tune to the Tow Tune since I didn't need the extra power. When I installed the Tow tune, I disabled the EGR system to see if that would help at all--which it didn't.
I'm a bit perplexed since I see zero white smoke at startup, or while driving. I plan on swapping out the coolant with some Caterpillar stuff and doing the flush in the next few weeks, so I was hoping to track down the leak before then. The truck has black version of the coolant hoses, but it doesn't seem like anything is leaking from them at this point. Also, per the OASIS report, the radiator is what originally came with the truck--which I've heard have had some issues with splitting at the ends? I would imagine that this would be very obvious if that were the case.
Finally, is it safe to install an EGR delete/block off plate with the tuner that I have? I have done some research over the past few weeks and it seems like some people on the forum say that a delete, or even a block off plate, requires a way to bypass the excess exhaust pressure either through a blow off valve or similar device. I plan to keep the Tow tune installed and am not looking for high HP numbers by any means. Also, is there a kit out there that seems to be better than the others? Thanks in advance! Sorry for the wall of text....
Sent from my Nexus 10
Last edited by diode_ee; 11-05-2013 at 09:42 AM.