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Adrenaline Junkie
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Recently with my 930 I am noticing that going down hill and maybe at a more accelerated rate of speed when I down shift or decelerate in second semi aggressively I notice, (at first it was) a puff of blue/white smoke. I can do this non-aggressively, just putting around and nothing happens.
I thought it was my left rear tire locking up, but a friend who was trailing me one day confirmed that it wasn't my tire, but in fact, it was coming from the lower left engine area. So, today coming down the mild 5% grade and it gave way and nothing except stopping would cause it to cease. I was thinking valve guides, but it all came up all of a sudden and doesn't occur in any other instance other than hard, at speed (3-4k) deceleration. Thoughts on this? Thanks! |
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Adrenaline Junkie
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Not one single thought from this vastly experienced group?
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Registered User
Join Date: Feb 2004
Location: louisiana
Posts: 1,481
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did you take a look at the turbo, and the drain line?
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Adrenaline Junkie
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I do remember that thread where the drain line was melting down on the turbo. I will look at that this morning.
Any idea why, if that is it, why it would do that on decel? |
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Registered User
Join Date: May 2004
Location: Encinitas (San Diego CA)
Posts: 4,495
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Chris,
Two ideas: 1. Something related to strong engine vacuum as would be valve guides. Is your friend sure it is not coming from the exhaust itself? How much oil do you consume? 2. Or maybe you have an oil leak exacerbated by deceleration (oil being thrown forward)? Doug
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1971 RSR - interpretation |
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Adrenaline Junkie
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Yeah, Doug, my friend was a few car lengths back when he saw the plumb emit.
I thought about the 'oil being thrown' forward bit, but this problem just came on so I haven't ever had it do this on accelerated decel before. |
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Adrenaline Junkie
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I'll have to have him set up behind me again to see if it was the exhaust.
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Crotchety Old Bastard
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It does sound like valve guides. If so it should go away when you push in the clutch.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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Forced Induction Junkie
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Check your intake tract from the CIS flapper plate all the way to the throttle body. If you find oil deposits below the flapper plate, you are sucking oil vapors from the oil tank. That is, if you have a breather hose going from your oil tank to the back side of the air filter.
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Dave '85 930 Factory Special Wishes Flachbau Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P |
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Adrenaline Junkie
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Quote:
Thanks to all that jumped in here! I do appreciate you all! ![]() |
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Registered User
Join Date: Nov 2005
Location: Evergreen, CO
Posts: 170
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Would a soaked oil tank and oil getting into the breather hose behind the air filter simply be symptoms of too much oil added at last oil change? Not being a smart a** here- I'm asking because I have a new to me 930 with these symptoms (sans the blue/white smoke) and I was wondering if previous owner over filled.
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Jay '86 930 '60 Land Rover Series II SWB |
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Adrenaline Junkie
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I understand that there is supposed to be a certain amount of oil in the tank,,, just not too much.
Is that right? Don't know if an over-fill would fill that up though. |
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Forced Induction Junkie
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Quote:
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Dave '85 930 Factory Special Wishes Flachbau Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P |
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