I swapped a friends old 1jz engine into my current supra and it started acting up within 200 miles, the oil pressure was low and it the RPMs dropped when I hit the clutch. It was crankwalk. I attributed this to him running a really heavy clutch on the motor with no neutral start disable. The end result was that even though the engine sounded fine; the cams were ground up in the head due to lack of oil, the oil pan was full of silver shavings, and my turbo was fried.
Eventually I got up the nerve to swap in another 1jz. I bought one from an importer that was originally automatic. I used parts from the original engine such as the water pump but nothing from the original oiling system and I got a new turbo and oil lines. Just like the first engine, I was running an ACT HD pressure plate and full face clutch with the neutral start disabled. I always started the car in neutral with my foot off the clutch. Three weeks after I started driving the car again, I shifted gears while getting on it and I heard a metallic scrape noise from the engine bay. I thought it might be something loose so I ignored it at the time. The next day, I drove the car around to do some errands and I noticed the RPMs had started dropping when I pushed in the clutch. This got worse and worse until by the time I got home, the engine would stall if you push in the clutch. Crankwalk again! I pulled the valve covers and some cam caps, and sure enough my cams were fried from lack of oil just like the last engine. Silver shavings were everywhere.
I've done several 1jz swaps before this with no problems, its only been this one car. I used Mobile 1 5w-30 and I didn't even drive far enough to do my break in oil change on the 2nd engine.
These two failures seem too similar to be coincidence. I've gone over it in my head many times and I can't think what I did to cause it. Everything points to some failure in the oiling system, the heads both had very little oil in them, as if it just wasn't making it up there, the first turbo had a discolored shaft as if it wasn't getting any oil as well. Both engines showed oil pressure and the 2nd engine showed good oil pressure the whole time. Any suggestions?
Eventually I got up the nerve to swap in another 1jz. I bought one from an importer that was originally automatic. I used parts from the original engine such as the water pump but nothing from the original oiling system and I got a new turbo and oil lines. Just like the first engine, I was running an ACT HD pressure plate and full face clutch with the neutral start disabled. I always started the car in neutral with my foot off the clutch. Three weeks after I started driving the car again, I shifted gears while getting on it and I heard a metallic scrape noise from the engine bay. I thought it might be something loose so I ignored it at the time. The next day, I drove the car around to do some errands and I noticed the RPMs had started dropping when I pushed in the clutch. This got worse and worse until by the time I got home, the engine would stall if you push in the clutch. Crankwalk again! I pulled the valve covers and some cam caps, and sure enough my cams were fried from lack of oil just like the last engine. Silver shavings were everywhere.
I've done several 1jz swaps before this with no problems, its only been this one car. I used Mobile 1 5w-30 and I didn't even drive far enough to do my break in oil change on the 2nd engine.
These two failures seem too similar to be coincidence. I've gone over it in my head many times and I can't think what I did to cause it. Everything points to some failure in the oiling system, the heads both had very little oil in them, as if it just wasn't making it up there, the first turbo had a discolored shaft as if it wasn't getting any oil as well. Both engines showed oil pressure and the 2nd engine showed good oil pressure the whole time. Any suggestions?
