Calling all M54 gurus! HELP!
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Brave soul performing a compression test and posting it here. There's been bad juju all here regarding compression tests lately haha
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ThatRatRodProject said:
The m54 is know to burn oil.
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That's what I have been told and read, but again oil consumption is one thing. The billowing clouds are another I would think.
As far as I'm aware Oil consumption is mostly caused by burning oil where else is it going to go.
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Can you post pictures of plugs also a video of the smoke would be helpful.
I will try to get the video up after work along with some photos of the plugs!
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As far as I'm aware Oil consumption is mostly caused by burning oil where else is it going to go.
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I believe you took that wrong. Yes oil consumption is caused by burning oil, I think we all can understand that. But when it comes to excessive smoke out the exhaust it's more than a standard "oil consumption" issue and all I was looking for was some people with experience beyond knowing that there are oil consumption issues with the m54. I appreciate the specs but this issue is more than reading the manual.
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Brave soul performing a compression test and posting it here. There's been bad juju all here regarding compression tests lately haha
I wasn't aware buttt I suppose if a person believes in that time will tell haha
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I know it is a different engine but just for comparison. My m50 smokes a little, Pretty sure it is ring blowby in my case because it smokes most under WOT. The m50 has no catch can/ oil separator, it just goes from the valve cover to the intake manifold (stock) and the baffling in the valve cover is not good enough to keep oil from going with the air. It has 275k on it so I don't feel it's abnormal. It doesn't hang in the air like a diesel but it is a visible smoke on startup and when romping on it. I don't keep great records but I think I add a quart every 1000-1500 miles, some is due to leaks though.
Compare to a 2 stroke engine. Assuming 25mpg, 1k miles is 40 gallons of fuel, mixed 50:1 that is 3.2 quarts of oil per 1k miles. You aren't near that much so I wouldn't think it would cause plug fouling problems. A little lube for the cylinders is good anyway.
How's that for redneck engineering?
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how many tanks of fuel have run through the engine?
Since this started about 2 tanks. One of which was under heavy abuse.
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I know it is a different engine but just for comparison. My m50 smokes a little, Pretty sure it is ring blowby in my case because it smokes most under WOT. The m50 has no catch can/ oil separator, it just goes from the valve cover to the intake manifold (stock) and the baffling in the valve cover is not good enough to keep oil from going with the air. It has 275k on it so I don't feel it's abnormal. It doesn't hang in the air like a diesel but it is a visible smoke on startup and when romping on it. I don't keep great records but I think I add a quart every 1000-1500 miles, some is due to leaks though.
Compare to a 2 stroke engine. Assuming 25mpg, 1k miles is 40 gallons of fuel, mixed 50:1 that is 3.2 quarts of oil per 1k miles. You aren't near that much so I wouldn't think it would cause plug fouling problems. A little lube for the cylinders is good anyway.
How's that for redneck engineering?
Hahaha I don't disagree there, but to me it's abnormal for alot hanging smoke to be in the air after start up and at idle and when blipping the throttle. I went through a quart in one tank of gas, so something has to be wrong. After a good compression test result im leaning toward valve seals.
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I would be checking to see if you have any broken ccv hoses first.
The CCV is deleted with a sealed system catch can set up, description is in original post
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You shouldn't have a dead end system, it needs to vent somewhere. Preferably into the intake. A quart per tank of gas is a lot. The crankcase should ideally have a vacuum when idling from the intake sucking from it. At minimum it should vent through a catch can to atmosphere.
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Quick hook up a vac gauge and see what it pulls at idle
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How are you pulling ccv gases??
You shouldn't have a dead end system, it needs to vent somewhere. Preferably into the intake. A quart per tank of gas is a lot. The crankcase should ideally have a vacuum when idling from the intake sucking from it. At minimum it should vent through a catch can to atmosphere.
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The system was described in the original post. The valve cover goes to the catch can. Then the other input on the catch can runs to the 2 ports on the intake. The oil drain is plugged.
Also JC,that's what I was saying. The amount of smoke coming from the exhaust is not by any means a "natural" amount. I'm not new to engines or building them even, just made this post incase I was missing something I may not know about with all the accessories on these engines.
Quick hook up a vac gauge and see what it pulls at idle
I planned to once I can get down to the garage
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