I am curious as a "what if" anyone has adapted a late model style oil cooler that uses a sandwich adapter with coolant hoses attached? This type system would eliminate oil lines going to a separate heat exchanger, and could use heater hoses attached to the sandwich adapter/heat exchanger

 

Interestingly, Oldsmobile used an oil cooler mounted in the radiator; like a transmission cooler, on the diesel 350s.

https://classicoldsmobile.com/forums...estion-173653/

I believe that the oil filter adapter had threaded ports and then lines that ran to the oil cooler. If you found one of these oil filter adapters you could make whatever kind of oil cooler you wanted. Good luck finding one though. That should be in our "rarest part ever" thread.

 

Interesting, knew about the diesel adapter. Didn't the diesel hold more oil because of it? Curious whether it was a leaker like on the 88 to 98 GM trucks.

 

The oil temperature on our 2010 Challenger SRT8 would quickly zip to 290° under sustained loads (mountains), forcing me to back off. I read that people were experiencing 330° oil in similar conditons.

I put on a sandwich-adapter cooler, plumbed with heater hose for the coolant. It wasn't enough. But it did have the benefit of cutting the oil warm-up time after a cold start by about 2/3.

I then added a thermosatic sandwich-adapter feeding oil to a large air-to-oil cooler ahead of the radiator. That kept oil temperature to 230° max and didn't affect coolant temperature.

This is a long way of saying that you need to consider how much capacity you will need before you buy parts.

The first step is to measure your oil temperature. If it never goes above 260°, then a high-quality, full-synthetic oil will prevent problems. At higher temperatures, a sandwich adapter will knock off 30°. At more extreme temperatures, go for the air-to-oil cooler with thermostat, which can reduce temperature by 100°.

Ask for more help as needed. Keep us informed. Good luck.

 

This is the reason behind my question. I drive on long trips a lot, through the mountains with my '74 Cutlass.

 

I didn't know what a sandwich adapter was. Here's one.

https://www.summitracing.com/parts/der-25770

 

I'm surprised the 2010 SRT didn't have the same pancake cooler that my 2019 Durango has. The Hellcat motors also have an air to liquid cooler in front of the radiator. I have a coolant cooled oil cooler on my 442 and the highest temp is about 230° easily reached at 70mph with the air conditioning running. Drag racers don't need such a thing.

 

The sandwich adapter is a big IF on an Olds - usually there's not enough room for one of those plus the filter around the exhaust. At a minimum you have to run the midget variant of the filter.

The diesel used a filter mount that had cooler line fittings. You can get those fairly easily by posting a parts wanted ad here.

The next step is to thread the oil outlets - or use an adapter block - to take AN lines straight off the block and set up a remote filter/cooler. Adapter blocks were never mass produced but there have been a few variants by a few folks. All hobby-shop stuff. Word of caution - there IS some variation in the filter adapter pad on the different Olds blocks. Make certain the fittings actually line up and the gasket can actually seal.

 

That aftermarket adapter does not have "coolant hoses attached". Those hose fittings are for pressurized oil hoses that go to an external oil cooler. By the way, the Toronado-powered GMC motorhomes used exactly this style of sandwich adapter, running the oil to a cooler embedded in the radiator.






The GMC motorhome vendors sell this adapter, but you'd be better off just using the Olds diesel oil filter adapter, which looks like this:

 

Apparently, the Oldsmobile diesel also used a transmission cooler. Here's an OLD thread; in which, JoeP posts a FSM pic. But, it's still not clear if the oil cooler AND transmission cooler go to the radiator.

https://classicoldsmobile.com/forums...al-diesel-404/

 

This can be used for remote oil circuits, I made this adapter for a custom set up, he will be using a turbo and remote oil cooler.

 

Awesome machining skills. Do you cut and crimp the oil hoses too?

 

Thanks!
No, I don't, let the hyd. shops do that, he's still in the build stage, got to get all the components together to determine fittings and line routing.

 

The radiator has a trans cooler and an engine oil cooler on the diesels. The oil lines are much larger than the trans lines.

 

Note to readers: be careful with oil coolers. They need to have pretty high flow. At one point I used a multi-circuit cooler from a Lincoln LS (three coolers in one! trans + power steering + hydraulic radiator fan! smaller than a condenser!) and used the largest circuit but it still restricted oil flow horrible such that pressure was very low until the oil got hot. Best to use a cooler specifically designed for engine oil. I have no idea how Olds set up the engine oil cooler on the diesels.

 

1980 -85 Cadillac Seville and Eldorado Olds 5.7 diesel. And the 1982-85 4.1 Cadillac V8. Have engine oil cooler and transmission oil cooler built into the radiator. One pair of lines goes to the front of radiator. The other to the back. Built into the passenger side tank. 1980 one year only California 5.7 Olds did not have engine oil cooler.

 

I can speak to the 2 diesels that I have. A 1982 Custom Cruiser and a 1980 C10 pickup. Both have the engine oil cooler in the driver side tank and the transmission cooler in the passenger side tank.