It's been a few years since I've been active on the forums, but I thought I would share some recent mod's I've done to my truck:
For several years I've had higher than desired oil temp's, particularly when towing. On a trip last year from SoCal to Flagstaff (in early September... still hot in the Dez), my oil sump temps were running around 242°
F, a bit higher than I'd like to see for a sustained period. I'm pretty sure it's due to the fact that I'm running the Stealth twin-pump setup, however, the issue seems to have been exacerbated when I went to the 207°
F thermostat a few years back. The temp that the PCM
sees (at the HPOP
reservoir) was slightly lower, but only by a few degrees. I pulled and replaced the factory cooler, hoping it was clogged or something (plus, it was 18 yrs. old, and the o-rings had to be shot...). But, it looked excellent, other than the old o-rings. I went ahead and replaced it with a brand new one... But that made no difference in the sump/HPOP temps.
It's unfortunate that no one makes an "all-in-one" spin-on filter adapter plate for the 7.3, that has external connections for an external cooler/filter, etc. There are a ton of them out there for various other engines and filter combo's, but nothing for the 7.3 Powerstroke. HOWEVER, I did find a remote filter base that accepts the stock FL-1995 filter. AND, a spin-on remote adapter/base, to go on in place of the stock filter on the engine. Both parts are made by "Hamburger's Performance Products" (part of "Trans-Dapt", a company that's been around a long time...). By combining those two items (remoting the stock filter back a bit), some hose, an oil-bypass thermostat, and, of course, a cooler... Voila! External auxiliary oil cooler system. It all tucked in very nice up along the left side of the block/pan. I doesn't hang down particularly low, so ground clearance shouldn't be a problem when off-roading. Also, I thought it important to keep the stock, FL-1995 filter in the truck, as they are readily available, and it's what works with the engine. Since I'm rolling on the road/out of town alot, I wanted the oil filter to be easy to find (every parts store carries a Powerstroke filter, in some brand!).
I haven't towed with it yet, but just running around town/highway, I'm seeing a significant drop in running temps: 10-12°
F at the HPOP
F in the sump. The current cooler is a top-inlet/outlet, 25-row unit, made in Sweden, but I plan to up-size to a 60-row "Earl's" cooler (with side in/out) very shortly.
The oil thermostat bypasses most flow around the cooler until the oil temp reaches about 200°
F , then it begins to close and direct the flow to the cooler (fully closed by 205°
All the hoses and fittings are -12 (3/4") size, so as not to restrict any flow. Originally, I had planned to use basic "1-wire" hydraulic hose & fittings for the plumbing, but the selection of hose-ends is much better with the S/S-braid "race" hose. It's a little "blingy", but kinda cool at the same time. Plus, being anodized aluminum, the fittings won't rust/corrode over time as steel hydraulic fittings might.
The oil filter base is mounted on a fabricated S/S bracket, bolted to the PTO cover on the trans. The cooler is mounted to the lower core-support member (although that will change when the bigger Earl's cooler goes in).
Here are some pics of the final install:
The second Mod is the coolant de-gas bottle. Always a source of irritation on these trucks (IMO
I've been through a few of these over the years, and was about to fab one up myself, out of aluminum. But then I Googled it, and found a few different manufacturers were actually making them.
Since I had already installed a Mishimoto aluminum radiator awhile back, I found that they had just released a new de-gas tank design (it wasn't even technically on the market yet). I was able to pre-order one (directly from Mishimoto) for a pretty reasonable price. It took about a month for it to arrive, but it's pretty nice! Has a little sight-glass to check cold-level. Welds are all very nice and clean; seems like a very well-made piece.
I ordered mine in black "micro-crinkle" finish, but they also come bare, polished aluminum. Fit was PERFECT! Looks much better, and no more worry of the sh!tty plastic tank cracking/leaking. Other aftermarket suppliers are selling them as well ("Summit", "Jegs"), but prices are a bit higher than I paid. Also, a couple of other shops are making custom aluminum tanks as well. They also looked very good, but were a bit higher-priced than the Mishimoto...
Check it out:
That's it for now!
Thanks for looking!