Smoke question
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Tuned
Joined: Mar 2007
Posts: 485
Likes: 6
From: Timmonsville
Smoke question
292 in 60 F600. Runs smooth and quiet with no smoke. Last week I cranked up for the weekly drive and it smoke like the rings were absent.Thick and white for the duration of the 10 minute ride. Oil level and oil pressure were fine. Shut her down and let things cool awhile. Cranked back up an not the slightest hint of smoke?????????WTH??
Logistics Pro
Joined: Feb 2005
Posts: 3,952
Likes: 117
From: Upper Left Coast
292 in 60 F600. Runs smooth and quiet with no smoke. Last week I cranked up for the weekly drive and it smoke like the rings were absent.Thick and white for the duration of the 10 minute ride. Oil level and oil pressure were fine. Shut her down and let things cool awhile. Cranked back up an not the slightest hint of smoke?????????WTH??
Yeah. white "smoke" is usually steam. an "absence of rings " probably would result in the engine not being able to run at all because of an absence of compression.
But oil getting past the rings would produce a lot of blue smoke......OTOH, blue smoke is usually due oil getting past the valve guides. (A compression check might point to the rings)
If you have a cracked head, block or failed head gasket, you might get some coolant into a cyl, but with enough leaking it could also cause a hydrolock which could either prevent you from cranking (and starting) OR, after complete warmup, allow coolant into the intake (if the intake manifold is cracked near the t-stat and an intake tube.
When it happened, what was the outside temperature and humidity? foggy, raining? Hot or cold?
Was the choke on? (manual or automatic?...........stuck? etc..........) A stuck choke will usually cause black (rich mixture) smoke.
It's fairly common for gasoline engines to produce some amount of steam in the exhaust until the exhaust system gets hot.
Regards,
Rick
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Tuned
Joined: Mar 2007
Posts: 485
Likes: 6
From: Timmonsville
warm day. Choke off. Not coolant. Thick heavy smoke.I could see the smoke and oil bubbling @ exhaust joint in front of engine. Definitely not steam. Never did that before and does not do it today.
Logistics Pro
Joined: Feb 2005
Posts: 3,952
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From: Upper Left Coast
removing the exhaust manifolds will give you a view of each exhaust port where you might see evidence of oil.
If you have oil at one ex port, that'll point you to that cyl. If you have oil coming from it, something catastrophic may have happened in that cyl.
Possible stuck intake (shut) valve might have the cyl sucking enough oil past the rings to accumulate some in the exhaust manifold and cross tube etc..... That would also likely result in a bent (or partially bent) pushrod tube etc.....If the valve was stuck open, and stayed open, the pushrod tube might have came off and then when the valve closed, it would stay closed......
I'm thinking out loud here but if you had liquid oil in the exhaust system, It probably came from a cyl unless someone is messing with you!
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