Frantz was the king of adapters. They had sandwich adapters. They had adapters to eliminate the almost useless full flow filter. All Motor Guard had was a plate that screwed on in place of the full flow filter. It had a 1/8" pipe port. You still had to return the oil to the oil pan. On GM and Chrysler V8 engines they had 3/8 hollow bolts. You take out a manifold bolt and screwed in a hollow bolt. The clean oil went into the valley with the push rods and lifters. Some Fords you could remove a fuel pump bolt and screw in a 3/8 hollow bolt. The head of the bolt was 1/8" pipe thread. I did the bosses 41'Chris Craft with 3/8 hollow bolts in the intake manifold. It was two 454 GM marine engines. I also used a 3/8 hollow bolt on his pickup with the 350 GM engine. The 350 had a 1/4" pipe plug just above the full flow filter for pressure. On his new Silverado Chevy 6.0 I will use a Perma=Cool universal sandwich adapter with a Ford filter. The 3/8 hollow bolt trick doesn't work on the VORTEC engines. He let the Gulf Coast 0-1 jr go with the old pickup. The new one will get the Motor Guard M-30. I told him to drive the truck long enough to make sure it is a good engine. I don't want to install the filter then remove it for warranty claims. For warranty claims which are very rare with modern engines you pull the filter off and make sure you screw on a GM filter. I only remember one customer that had warranty problems. It was a 460 Ford. They never mentioned the Frantz. It was an oil burner. He finally gave up on the warranty and took it to a garage and told them to fix the problem and install an RV camshaft. All of the ring gaps were lined up on one piston. He got into the dealer telling him he had to let them put in the oil so they could monitor how much oil it was using.
A salesman at Sears was trying to sell me an extended warranty on a new lawn tractor I bought. I told him I do my own work. He said if I do my own work it will void the warranty. I brought it home and installed a sandwich adapter and bypass filter. The Kohler 20 HP takes a Ford 3/4-16 adapter. I like the design of the Perma-Cool adapter. It treats the Motor Guard like a clogged oil cooler. The relief valve opens and lets enough oil bypass directly into the full flow filter to keep the engine supplied. Gulf Coast doesn't allow me to use the Perma-Cool adapter with their filters. Since most of my customers use them I brought back the Motor Guard which is the best lube oil filter.
On my web site I explain what to do if you are concerned about tissue getting in the oil. Install a small sintered bronze filter at the outlet, or I will install one for you. Paper fibers can't get thru a 90 micron filter. I haven't worried about that for 40 years.
If you have an oil pressure gauge it is easy to test a Perma-Cool.Com sandwich adapter on a engine that has the relief valve in the filter like Ford, Chrysler, VW, Toyota, Nissan, Honda and most others. Put 3/8 pipe plugs in the in and out ports. Install the sandwich adapter on the mount and the full flow filter on the sandwich adapter. If your oil pressure is good it means the relief valve in the adapter is large enough to supply the engine with oil. If the engine needs more oil than the relief valve can handle drill a 1/8" relief orifice in the adapter and try again. If everything looks good hook up your Motor Guard. If the Motor Guard gets hot it is filtering good.
The GM adapters have no relief valve because the relief valve is in the filter mount instead of the filter. On a GM diesel I drilled the GM 771-185 adapter 1/4". I drilled a 771-195 remote filter mount 1/4" and tossed the full flow filter on my Camry. It makes a nice installation but it is tricky. The orifice may need to be larger on a big engine. Too large and you won't get enough oil to the Motor Guard. Too small and you don't get enough oil to the engine. Good oil pressure and a hot Motor Guard and you got it. Normally the Perma-Cool adapters are used for oil coolers and remote low restrictive oil filters. Filters that clean oil are all restrictive.
Ralph
[ August 16, 2003, 12:39 AM: Message edited by: RalphPWood ]
