4g63 Oil Filter Housings

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.

[Cervan]

I dont even own a 4g engine or a DSM. Im here just kicking around on youtube and i stumbled across your videos. Your videos have got to be hands down the most informational and pain-stakingly detailed videos ive ever seen on any subject of an engine. Although i dont own a 4g63 or one of its counterparts im very thankful for the time and effort you put into taking these measurements and plotting them. If i had something like this on a honda or LS based engine it would have been a godsend.

 Once again, i thank you not as a DSM owner, but as a person in the engine building community.

[stanthology]

In case nobody mentioned it, you are an amazing person. I enjoy your vids a lot.

[derekeklund]

Awesome info, just a side note... I just drill & tap the spring cap M6 & use a bolt & lock nut so I can adjust the pressure to what I need for a given engine. I also cut/grind 2 coils off the spring so & have enough adjustment. Of course all my engines have the balance shafts removed.

[dee]

I know i am not the only one that wished you did these technical videos for my engines ( 3sgte/ 4age) but I understand that takes time and money.. still I watch these due to the crazy amount of info and how it can apply to my engines.. keep it up.. no one else on the internet like you! Look forward to more!..

[ellenferraro]

Well, I consider myself above average when it comes to digesting new material. I have watched both videos that you generated discussing oil flow, pressure, and its effects on the oiling system. Not once, not twice, but many times. You move rather rapidly and so it has taken me a while to digest it. Great material, by the way and once again, thank you very much. I think many do not appreciate the ramifications of changing parts inside a motor.

[francistheodorecatte]

I'm not a DSMer (I'm a SAAB/Volvo guy, ) but I'm currently in the planning/parts buying phase of turning a 2.3L non-turbo SAAB B234I and turning it into a quasi 2.3L turbo SAAB B234R (quasi since I'm not running piston squirters, and I'm planning on using a B235R head, ) and I was having trouble wrapping my head around what I should do about the oiling system and oil pressure regulation. Thanks for this video.

Actually, thanks for all of your videos. You've taught me a lot about engine building that I couldn't really find as well explained and in one place anywhere else.

[sivucit]

Thanks so much. You have really taught all secrets that buried inside the internal combustion engine, starting from ROD, Journal, piston, block, Valve, oil pump, oil housing etc. you know what I have been trying to search the oil pump and oil filter routing in internet and got nothing and found only you. In simple your videos will be spoken after our generation. True all good things are hidden and as u said only torque spec is given in manual. Great work. have no words.

[paulrandall]

Who ever said you can't know it all needs to watch this guy's videos. Leonardo DaVinci and Carol Shelby mashed into one. Keep the videos coming my friend 👍

[BoostedBeaverGarage]

You just effectively kept me on the couch for 33 + minutes watching this video. I really can not say that for a whole lot of people :) The funny thing is, I will need this info again and again and again!!! :) Thanks for the hours upon hours of countless editing and soaking yourself with a water hose while it was still cold out :)

Robert

[cmendoza]

About to start a rebuilt 4G61 in my 90' talon, with a turbo 4g63 oil housing from its original engine. Wish me luck! I'm learning a lot bumping my head around like a mole though. And hopefully I understood correctly, lacking a balance shaft and using a turbo housing will probably increase the oil pressure a bit but not too much. Thanks for the videos, have been a constant source of information across the years.

[chuckAWD]

Thank you Jafromobile for making all of your videos man!!  You're a huge help and inspiration to the DSM and car community in general. 

[Hamtheman]

Easter Monday, day off work. Sitting down with bacon and eggs for breakfast with a new Jafro video. Life is good.

[MrKraez]

I started watching your videos years ago when I owned a DSM. That car is long gone, but I still find your videos very entertaining and informative! Keep up the good work!

[Yannc]

Man old videos like these are such a big help I can read but after a while my attention always fails me, video format is always where I absorb the most. I'm about to build a street 4G64/4G63 Hybrid for my 95 Talon TSI FWD and trying to get has much covered in general knowledge as possible, I've built cars before but the DSM's are definitely their own animal

[ewells]

Hey Jafro, this video was well worth the wait. I doubt Mitsubishi themselves could pull all this info together.

[bash]

I don't own a Mitsubishi, but I "Liked" this video and subscribed because you are so informative and entertaining. Thank you for putting so much time and effort into your videos. I don't even want TV anymore!

[GammaCruxis]

I've never seen such in-depth knowledge concerning a type of vehicle in ages. This is a strong breath of fresh air. Cheers to you sir, and subscribed.

I own a 3G and an Evo IX and may pick up a 2G in the future (if I can ever find one that hasn't been ground into dust). Keep it up!

[kevinw]

Always checking online for these. It pays to deal with computers when Jafro uploads data. Another great vid.

[emutlyaussie]

Specs from the G4CP workshop manual, for comparison are, for the pressure relief spring are: Free length 46.6 mm (1.835 in.), Load [61 N (13.5 lb) - 40.1 mm (1.579 in.). Oil pressure at curb Idle speed is 11psi or more. I'm planning on eliminating the balance shafts in the build. Will let you all know how it goes. Thx again for the great vids.

[TheDontmatter]

I don't own a dsm but I still love watching your videos just for the learning experience and I appreciate your hard work on making these videos