Smoke at Start up - Valve Seals?

[Rick62]

The 440 in my pickup has started smoking after startup. It quits smoking after a couple of minutes. Blue oil smoke. Hard throttle after warm up, no smoke. If it's driven frequently, no smoke. If it sits for a few days, smoke. Is there something I should check other than valve stem seals?

 

[Cranky]

Sounds like that to me! How many miles are on it and what weight oil are you using in it?

 

[Daves69]

.....Is there something I should check other than valve stem seals?

You might read the plugs, see if it's all or one. I'd also take a look at PCV and for oil under the intake on the valley pan.

 

[66Satellite47]

Probably the valve seals. Pull the valve covers & take a look.

 

[Cranky]

If they are old, they are most likely hard and brittle.....

 

[69a100]

Is there something I should check other than valve stem seals?

IDK? You might want to check your valve seals. Good Luck

 

[Rusty 72]

If your valve stem seals are all broken and in pieces I'd consider pulling the oil pan and cleaning the pump pick up. My 318 had never had them changed when it came to me and they wound up in the pan and completely clogged the oil pump pick up.
Good luck

 

[69L48Z27]

Value seals a usually have a characteristic of a quick smoke burst and it doesn’t take a warm up cycle to go away. Usually. You may have rings that are stuck or valve guides that are out of tolerance. Point is, there may be other things to look at depending on the age of the engine.

 

[Cranky]

Had a 69 Dodge pickup with a teen that would smoke after it warmed up but most of the smoke happened while idling. Fixed it with 3 cans (yup, cans back then) of STP fixed it