Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
1979 brat 4x4Low oil pressure at idle
Posted 17 February 2013 - 07:44 PM
Posted 17 February 2013 - 10:18 PM
Posted 17 February 2013 - 11:41 PM
Wow the body looks clean as hell!!! Very nice looking brat!!!! If your oil light goes on Im guessing there possibly can be an issue on either your oil level or pump but Im no expert. Wait for a more inteligent reply from someone here on the board with better know how than me. Please post more pics!!!!
Posted 17 February 2013 - 11:45 PM
Posted 18 February 2013 - 01:20 AM
Posted 18 February 2013 - 08:28 AM
Posted 18 February 2013 - 09:51 AM
Get a reading of that oil pressure while cold and while warm when the light is flickering. It would be interesting to know the difference.
Posted 18 February 2013 - 12:37 PM
I'm finally home. I'll be hooking up the oil pressure guage in a few but first I broke out my factory service manual. Check out these specs.
Edited by maestro, 18 February 2013 - 12:59 PM.
Posted 18 February 2013 - 03:18 PM
Thanks for those diagrams btw ill post pressure specs when I get home this evening.
Posted 18 February 2013 - 08:28 PM
Yep the chilton and haynes will get you so far and then leave you sucking for air. What I hate is when it says, "This procedure is too complex for the home mechanic. Take it to a pro." Or something like that. BITE ME!!!
Sometimes you can get these factory service manuals on ebay or amazon used when they occasionally pop up. You may be able to get it from the dealer. Publication number on mine is SM76TUS. I did find this thread: http://www.ultimates...980-to-present/ and they list several manuals.
I am still looking for my oil pressure guage. I keep one around to test pressure on different vehicles. I almost never trust facory sending units especially when it is a light rather than a guage.
Do you know where to connect your oil pressure guage? If not, look under the engine bay where the oil filter is. Where the oil filter is screwed onto the housing there will be an allen head. Obviously you will need an allen head wrench to get that out. Oil will get you in the face so look out. This is where the oil guage connects if you have a factory oil guage setup. The oil light sending unit is oposite the oil filter on that same housing. I suppose you coudl remove it and put your guage in there if you dont have an allen wrench. The oil light sending unit will have the wire on it and is easy to find. Let me know if you need a pic.
Keep me up on what you find.
Posted 18 February 2013 - 11:48 PM
Posted 19 February 2013 - 05:20 AM
If it were me, I'd clean the valves and make measurements best I could. Even if the measurements were out of spec try replacing the oil pump and see what happens. If the pressure is low and I found the measurements out of spec or not I'd replace the oil pump, http://www.autozone....omString=search, expensive unfortunately. Alternatively you may be able to find an engine locally, either from someone with one running and on the road and see if they will let you try the oil pump before you buy a new one. Or find one in a junkyard and buy it but you don't know for sure if a junkyard one is good or not. If oil pressure is still low with a known good pump you definitely got worn bearings. You can buy new bearings and replace them only or get a complete rebuild kit if you are inclined. I'd go ahead and do a complete rebuild since changing the main bearings requires splitting the case and the engine is already completely disassembled. And... since if you've gone that far why not send the cam off for a grind. Everyone on here says deltacam will do either a torque or hp grind. The torque grind is for if you think you're going to do lots of low revving off roading. he hp grind is for more highway use. Also a port and polish of the heads is advantageous. Possibly look into shaving the heads a bit for higher compression but I am not sure how much is safe for valve clearances. Okay, I'm probably way ahead of myself but I'm just saying.
Also, please take pictures or video of the oil pump disassembly and cleaning and post. This can be useful for others with similar issues in the future. Keep me posted on your progress. And that does indeed look like a nice clean gen 1 brat. I wish my bumpers looked that nice. Mine are bent and dented.
Edited by maestro, 19 February 2013 - 05:23 AM.
Posted 19 February 2013 - 07:27 AM
wow thanks for posting those pictures..my brat is doing the same thing..it is also leaking out of the pan so I figured it is time to pull the pan replace gasket, switch and clean the pump up!
Posted 19 February 2013 - 08:40 AM
Posted 19 February 2013 - 09:41 AM
$40 is awesome! I didn't think to check ebay. Does the new pump come with the valves and all? If so then for that price forget about going through all the trouble to clean it up. Swap it for the new one and test it out. I hope that fixes the prob because tearing the engine down will suck.
Posted 19 February 2013 - 10:16 AM
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users