Top end oil prob? 85 900T16 - Saab Performance Bulletin Board - Saabnet.com
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Top end oil prob? 85 900T16
Posted by Jordan (more from Jordan) on Wed, 2 Feb 2005 13:34:36
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I don't know what spark knock sounds like. Lately, only past base-boost, theres a very fast, subtle "knock?" coming from the motor. It's like a very consistant rattle. I can't descibe it other than that. And sometimes it instantly goes away at higher RPM's. No one seams to hear it but me lol. No, I'm not crazy lol. I thought this was connected to a very loud knock when the engine was cold. Turns out that knock was the cast downpipe piece had a loose nut at the turbo. I tried tighening it with a wrench, but I didn't pull too hard in fear of breakage. So, that noise is quieter now in the morning, but not gone.
Although it goes away when warm, could that exhaust leak be the noise I'm hearing under load from the motor? However, I did read somewhere about "camshaft oil tubes" or something like that, made of plastic, and quite cheap to buy, that sometimes break. Could it be low oil pressure at the valves?
Any thoughts would be appreciated. If you have any questions about anything else on the car that might help, just ask.
Thanks a lot.
posted by 142.177.112...
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