Does anybody here actually know anything about cars? 7M-GE Supra

Hachiroku $B%O%A%m%/(B · 2009-08-18T22:11:53+00:00

No, not you guys in rec... 1988 Supra, 7M-GE. I got it with ~177,000 (the speedo's busted, SURPRISE!) and have put 10-15,000 miles a year on it for 5 years. So we're looking at ~230,000 miles. When I got it the oil pressure was on the low side, and it has been getting lower and lower. It's a Canadian model, and when running 35-45 MPH the oil pressure is under 2KG/cm2. I don't know what that equates to in PSI, but it's the bottom 1/3 of the guage. At idle it's about 1KG/cm2. Oh. 2 k/cm = 28.4 psi (2,500 RPM), 1 k/cm= ~15 PSI (750 RPM) Seems pretty low. I did buy a sending unit after I bought the car, because they are known to go on the low side as they age, but I CAN'T FIND THE DAMN THING!!! From this: Measure Oil Pressure: Oil Pressure: at idle speed: 0.3 kg/cm2 (4.3 PSI) or more At 3,000 RPM: 2.5-5.0 kg/cm2 (36-71PSI) I think at 3,000 it's just under 2.5, but it seems to be sitting under 2 k/cm most of the time. I haven't changed the oil this year, since I haven't been driving the car. It needed ball joints, and I just did them 2 weeks ago. Also, from the same page: Low Pressure: Oil Leakage (*) Releif valve Oil Pump Poor quality oil (*) Crankshaft Bearing Connecting rod bearing Oil Filter clogged (*) Well, I think the engine could use a freshening, but there's no knocking to be heard. The Oil Quality...hmmm...I added a quart or two before I started driving it. Oil Leakage. I did the spark plugs last year, and didn't want to spend $7 each for the Factory Stainless steel screws and bushings from Toyota, so I made some up from the Hardware store. I think I'll have a look at these to see if they're loosening, because I'm also smelling oil burning off something. I replaced the valve cover gaskets when I did the plugs, since they had 1/4" gaps in them and were leaking badly. Oil Filter clogged. Like I said, I did a change before I put it away last November... I'll check the obvious Saturday and then get back...