2eighTZ4me Posted May 29, 2008 Share Posted May 29, 2008 I have an Oberg remote mount oil filter. Am also going to be running a cooler as well. I need an adapter for the block to go to AN fittings. In reading the How to Modify Your Datsun/Nissan, it states on page 14 to pull the relief valve and tap it for 3/8" NPT and plug it off. Says to pull out the nipple and use a 1/2" NPT adapter with a 10 AN fitting. Based on what I've read in the FSM for the oil circuit is that it comes from the pump directly to the filter via the oil galley opening at the bottom of the filter boss. It is then sent through a "filter device" and then returns through the nipple to lube the engine. Do I need just a regular oil filter adapter that will spin on the existing nipple, or do I need to go the route of blocking off the relief valve and installing the 1/2NPT > -10AN adapter? Not exactly sure how this works - or I'm missing something big in the picture. How would you mount an adapter on a -10AN fitting? Thought they were all standard NPT. I'm confused. Any ideas on what adapter I should purchase? Also - do you recommend running the cooler after or before the filter? Quote Link to comment Share on other sites More sharing options...
rztmartini Posted May 30, 2008 Share Posted May 30, 2008 im not positive, but i think that what the book is telling you to do is to make an inlet and an outlet, both with AN fittings...that way you dont need an adapter, just run the oil lines stright out of your block... or i might be mistaken...hope this helps... Quote Link to comment Share on other sites More sharing options...
2eighTZ4me Posted May 30, 2008 Author Share Posted May 30, 2008 There has to be some sort of adapter that has a gasket like an oil filter to route the oil out to the filter. There is no way to put any kind of AN fitting on the inlet from the oil galley - it runs parallel to the block and exits parallel to the block at the bottom of the oil filter boss. Even the pictures in the book were less than clear, as were the instructions. I have since purchased a spin on unit from Summit and will see if it works. Has anybody else done this mod as explained in the How to Modify Your Nissan/Datsun book? I can't seem to figure out something that is probably dead simple. Quote Link to comment Share on other sites More sharing options...
blueovalz Posted May 31, 2008 Share Posted May 31, 2008 It will. It is the same as the Ford filter threads, and will allow the AN-10 fittings to be used to either the single or dual filters. I'm looking at the book as I write this, and it makes little sense to me as well, and even less sense with the simple parts available to simply screw a contempory adapter in place (as you've purchased). Quote Link to comment Share on other sites More sharing options...
Slow_Old_Car Posted May 31, 2008 Share Posted May 31, 2008 something like this should accomplish the same effect right? install it in place of the oil filter on the block, then put a remote filter w/ a cooler inline? Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted May 31, 2008 Share Posted May 31, 2008 Hey Slow,,,I was thinking the same thing - if it would fit a Ford it'll fit our L28's! Quote Link to comment Share on other sites More sharing options...
310z Posted June 1, 2008 Share Posted June 1, 2008 I am not 100% sure but 280zx turbos had external oil coolers. They had a adapter that looks like the one Old Slow posted above. That should get you pointed in the right direction for your AN fittings. The book was written prior to this part being made from Nissan. Quote Link to comment Share on other sites More sharing options...
johnc Posted June 1, 2008 Share Posted June 1, 2008 You need this: http://www.pegasusautoracing.com/group.asp?GroupID=OILFILTADAPT And this: http://www.pegasusautoracing.com/productselection.asp?Product=1226 And run in the following order: Outlet on the Adapter > Filter > Thermostat > Cooler > Inlet on the Block. Also, plug off the relief valve in the block. Run at least -10 lines with -12 preferred. Quote Link to comment Share on other sites More sharing options...
PanzerAce Posted September 24, 2008 Share Posted September 24, 2008 You need this: http://www.pegasusautoracing.com/group.asp?GroupID=OILFILTADAPT And this: http://www.pegasusautoracing.com/productselection.asp?Product=1226 And run in the following order: Outlet on the Adapter > Filter > Thermostat > Cooler > Inlet on the Block. Also, plug off the relief valve in the block. Run at least -10 lines with -12 preferred. John, I've seen some people say that it should be outlet->thermostat->cooler->filter->block, does it really matter what order it is in? And if so, what are the advantages and disadvantages of each setup? Also, is it worth getting a fan for the oil cooler? Quote Link to comment Share on other sites More sharing options...
johnc Posted September 24, 2008 Share Posted September 24, 2008 It doesn't really matter. I run the filter first so that junk from the engine doesn't get into the thermostat or cooler. Quote Link to comment Share on other sites More sharing options...
katman Posted September 25, 2008 Share Posted September 25, 2008 And if I'm not mistaken your Oberg has a bypass valve and a sensor to tell you when it's bypassing. I also go filter first. Quote Link to comment Share on other sites More sharing options...
2eighTZ4me Posted October 21, 2008 Author Share Posted October 21, 2008 John, I got the thermostat yesterday from Pegasus. It has 2 ins and 2 outs. Am I to understand correctly that I must use all 4 ins/outs, such that I run from the engine (to filter) to the thermostat (onto the cooler), and then coming back from the cooler - run it through the other in/out of the thermostat - on its' way back to the motor? Looks like the thermostat is setup to bypass internally, and just route the oil back to the motor if it isn't hot enough - hence the 4 connections. Cold oil will just make a U turn at the thermostat (through the thermostat) to the bottom connection and go straight back to the motor? That's how I'm interpreting the instructions at least. Is this correct? Quote Link to comment Share on other sites More sharing options...
johnc Posted October 21, 2008 Share Posted October 21, 2008 Yes. Quote Link to comment Share on other sites More sharing options...
2eighTZ4me Posted October 21, 2008 Author Share Posted October 21, 2008 You mention "plug off the relief valve in the block" - I got one of the TransDapt Ford style spin-on remote filter adapters. Do I still need to block it off? The Oberg does not have a bypass (not that I can tell) So I'd extract that "ball on a spring" thingy in the oil filter mount area, and just plug it off with an NPT plug? What would be the repercussions of not doing so? Just want to get this right the first time. Quote Link to comment Share on other sites More sharing options...
johnc Posted October 21, 2008 Share Posted October 21, 2008 You don't need a relief valve if you change the oil and clean your filter regularly. Remove and plug as you stated. The repercussions are little to no oil filtration or cooling if the relief valve trips too low. Quote Link to comment Share on other sites More sharing options...
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