Hydrolift

I like chrome, but I have read somewhere that chrome on a oil cooler reduces it`s efficiency. Anybody else heard or read about that?

Wobble

Hardin marine claims 30% loss for chromed cooler, I have my doubts that it is that much.


I am a firm believer in filter after cooler.

the typical cooler only reduces oil temp 25* in one pass and my Teague dual pass offshore cooler only reduces 50*, so I don't think that is enough to affect oil filtration.

If you have one piece of weld spatter come out of a new or old cooler, you will have a way bigger problem.

BTW Teague also filters after the cooler.

Reed Jensen

Not all the oil passes through the filter matrix... If you have any.... ANY... debris in the oiling system... your bearings are going to suffer. If you have a Fram HP-6 or HP-1 filter there is a bypass built into the filter. Most of the time the bypass is open to allow oil to flow to the engine. Only when the oil is hot and the flow is minimal will all the oil flow through the matrix. Hot oil is easier to filter than cold. Filter first, cool later. And I don't care WHO does it the other way.

Reed Jensen

We got them real smarty boys out here in Californy.... They like to do thangs real differnt. Like plumb oiling systems bass-akwards and cool the oil until it's no hotter n' 70 degrees... "cuz the colder the better!" Then yur engine go boom!.......... Who could that be?.....

Wobble

It was my understanding that the filter bypass, built into some filters does not bypass until pressures of around 100psi are seen. On the other hand, the differential bypass valve built into the block or filter pad adapter (15 or 30psi) can open much earlier, which is why I plugged mine.

I know we are never going to agree on this subject

Reed Jensen

The bypass built into the filter will open with as little as 10 lbs differential in pressure. You can have 100 lbs of pressure in the system but if you have only 90 lbs on the other side of the filter matrix the bypass will begin to open. It isn't the total pressure, but the differential in pressure between the unfiltered side and the filtered side of the matrix. Trust me on this one.... most of the oil passes through the bypass. If the filter doesn't have a bypass, then the engine's oiling system has to have one. If not... not enough oil will get to the bearings.If there wasn't a bypass, the oil that can't pass through the filter will return to the pan through the pressure relief valve. I've rebuilt racing engines and stock engines from all eras of automotive history, both foreign and domestic. I've built supercharged marine engines, and one of the few things they all have in common if they have a fully pressurized oiling system is an oil bypass for the filter. ( If there is a filter.)

Strip Poker 388

iTrader: (6)

I am sure it does. Like black dissipates heat better.Also a ruff case piece has more surface area that will cool better.I am not building too much heat so it not a prob.

Reed Jensen

As long as the chrome is on the outside only, there shouldn't be any difference. The heat exchange happens on the inside. What little heat that radiates on the outside isn't going to make any difference. Even if the chrome is on the inside you probably won't see any difference.

Wobble

I stand corrected on the filters bypass operation.

However, the consensus on Bobstheoilguy seems to be that they rarely open, particularly with synthetic oil and a filter that is changed regularly. My point is that you are placing your faith in the manufacturer of heat exchangers to provide you with a perfectly clean oil cooler. I have been in the heat exchanger business for 20+ years and know that doesn't happen.

The small amount of oil that may bypass a clean filter is far less likely to contain large enough particles to damage your engine than you may get from running filtered oil through a new or reused oil cooler that may be contaminated. There is no foolproof way to clean a new or old heat exchanger due to their construction.

Running the longer filters as articfriend does will further reduce the chances of bypass.

Strip Poker 388

iTrader: (6)

So in this pick I tought this was a anti drain back valve or is it a bypass?