4g63 Oil Filter Housings

The link to my website is here BUT THE DATA AND PAGES ARE NOW BEING CREATED. I couldn't leave you without a video any longer. I really will have a link here very soon that goes straight to the information. To prove I'm not bullshittin' you... here's the website. http://www.jafromobile.com

It's full of placeholders and copy I did not write. Though I did not write it, the author knows me very well! There will be highly-detailed measurements of all the pieces parts available shortly.

I suppose if there was anything else I needed to say here it would be... these are the filter housings I got my hands on and tested. They happened to be from each of the models of the mainstream cars with a 4g63 in the United States with only one exception (EVO III). There may be variations from year to year, but to be as specific as I possibly can, read on...

The 91-94 housing I demonstrated is specifically from an early 1992 6-bolt/4-bolt turbo AWD car. The one I call 95-99 is specifically from an October '94 built 1995 model Eclipse GSX. One of the '90 OFH's was brand new, and the other one on the Colt came from a 1990 Plymouth Laser FWD.

The Galant housing I have no data on. I was told that's what it was. It may actually be from a non-turbo Eclipse? The 1990 factory service manual has an illustration of this oil cooler-less unit. I've never paid attention to this in the junkyard and I haven't owned a NA 4g63. Do the 1g non turbo DSMs even have oil coolers? You guys know better than me.

The non-turbo oil filter housing is the least restrictive because it has the longest spring installed depth. The non-oil-cooler blocks are the no-oil-squirter blocks. Get how these are similar? You put an oil cooler on this thing and your pressure goes up. Look at the charts.

Put an external air-oil cooler on a 1g? Your pressure goes up. Put the Evo III housing on a 2g? Pressure goes DOWN. High oil pressure can result not just from how you built your motor.

Last thing to say... Yes, you could easily INCREASE your spring installed height by using a THICKER crush washer. That would lower your pre-load, opening pressure AND piston travel across the port prior to spring bind. Could you double-stack crush washers? Probably. Will it leak oil? I'm sure it will eventually. Either bore the cap deeper or machine a 1 piece part is my recommendation. Would I try it with stacked crush washers? Most definitely. Look at what you have to do to remove and port it.