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My mechanic said this smoke\steam is due to the timing cover leak on my IS250.
Do you agree? Would like second set of eyes on this before before bringing this to the shop.
One thing you can check is with engine off, and preferably warm. Remove the oil cap, and check If you see any sludge build up inside. The pressure has to relieve somewhere. The valve covers have gaskets. They only require a few in-ft lbs of torque. I'm not really sure I haven't checked the specs for our valve covers. It should be relatively low though. Over the years they harden up, and get brittle no longer providing a good seal. The pcv is open slightly at low rpm high vacuum. The crank case gases get sucked back into the combustion chamber. If it's not functioning you get pressure build up quickly.
One thing you can check is with engine off, and preferably warm. Remove the oil cap, and check If you see any sludge build up inside. The pressure has to relieve somewhere. The valve covers have gaskets. They only require a few in-ft lbs of torque. I'm not really sure I haven't checked the specs for our valve covers. It should be relatively low though. Over the years they harden up, and get brittle no longer providing a good seal. The pcv is open slightly at low rpm high vacuum. The crank case gases get sucked back into the combustion chamber. If it's not functioning you get pressure build up quickly.
I will check this out tomorrow. Never knew about this valve.
One thing you can check is with engine off, and preferably warm. Remove the oil cap, and check If you see any sludge build up inside. The pressure has to relieve somewhere. The valve covers have gaskets. They only require a few in-ft lbs of torque. I'm not really sure I haven't checked the specs for our valve covers. It should be relatively low though. Over the years they harden up, and get brittle no longer providing a good seal. The pcv is open slightly at low rpm high vacuum. The crank case gases get sucked back into the combustion chamber. If it's not functioning you get pressure build up quickly.
It didn’t resolve the issue. Was worth a shot, though.
Verify all the PCV tubing is unobstructed. Mainly the one that feeds into the accordion hose. Also there is an oil feed banjo bolt that seeps over time, that said, that looks more like a valve cover leak.
Take the plastic off the fenderwell, spray some simple green on a cold engine, and hose it off. Get it clean so you can see where it's coming from. PS a long bristled paint brush is pretty helpful too.
I might have missed it, but what SMELL/ODOR was the smoke? Burnt or burning oil smell or a burning plastic/metal smell? That smoke is coming from directly above the alternator, which in my case smoked a bit right before completely dying. It was horrid mix of burning plasticky and metal smell.
I might have missed it, but what SMELL/ODOR was the smoke? Burnt or burning oil smell or a burning plastic/metal smell? That smoke is coming from directly above the alternator, which in my case smoked a bit right before completely dying. It was horrid mix of burning plasticky and metal smell.
What, the smell of burnt rectifier diodes in the morning is a turn off?
I might have missed it, but what SMELL/ODOR was the smoke? Burnt or burning oil smell or a burning plastic/metal smell? That smoke is coming from directly above the alternator, which in my case smoked a bit right before completely dying. It was horrid mix of burning plasticky and metal smell.
Oddly, my alternator just went kaput. When I pull out the alternator, I want to see if the smell is the same distinct smell.
Im hoping this is the culprit.
I might have missed it, but what SMELL/ODOR was the smoke? Burnt or burning oil smell or a burning plastic/metal smell? That smoke is coming from directly above the alternator, which in my case smoked a bit right before completely dying. It was horrid mix of burning plasticky and metal smell.
Originally Posted by 2013FSport
What, the smell of burnt rectifier diodes in the morning is a turn off?
Maybe this smell would be better?
Originally Posted by markdav801
Oddly, my alternator just went kaput. When I pull out the alternator, I want to see if the smell is the same distinct smell.
Im hoping this is the culprit.
Sounds like the moderator jinxed you! Burned diodes have a nice electronic oder to them. Nothing like oil or grease...
I really can’t explain the smell. I know what a fried circuitboard smells like (doh!) and I don’t think it smelled like that. But it also didn’t smell like oil or grease. It was somewhat pungent…. Different.
09-01-21, 01:36 PM
Steam\Smoke engine bay (video)
