What would cause air to come up through the valve covers. new rebuilt 318 have been driving it for about 1000 mile now. coming home the other day got on it just a bit and noticed blue smoke coming into the car. any ideas thank
Agreed, sounds like blow by compressing the crankcase. I had a similar problem after overheating my 318.Blow-by. That is, compression leaking past the piston rings. At 1000 miles it's possible that the rings haven't seated yet, but I've never had it take anywhere close to that long. What pistons and rings were used in the rebuild? Wall clearance, end gap etc...
Blow-by. That is, compression leaking past the piston rings. At 1000 miles it's possible that the rings haven't seated yet, but I've never had it take anywhere close to that long. What pistons and rings were used in the rebuild? Wall clearance, end gap etc...
Do you have a crankcase ventilation system set up? PCV ?
Agreed, sounds like blow by compressing the crankcase. I had a similar problem after overheating my 318.
That's a clean looking engine! Would you consider using steel fuel lines to your carb since rubber lines are a fire hazard?
. How does it run hooked up that way?
Hey that's maximum idle air bypass, don't you know? Goes good with a 268.lol
And double filtered, too!
Doesn't have to drill holes in the throttle blades at least.
It ran ok never really good always felt unbalanced and now i know why. thanks for the feed backThat looks like strait vacuum into a breather. the breather hose should go to the air cleaner, the opposite valve cover should have a pvc valve and hose going to the bottom of the carb. How does it run hooked up that way?
Hey that's maximum idle air bypass, don't you know? Goes good with a 268.lol
And double filtered, too!
Hyup, your installer/tuner has some 'splaining to do!
I would get rid of that plastic fuel filter too. If it ever pops you could be in for a major meltdown!
And I would swap out that 20/50 racing oil, for some 10W30 street oil.
Yeah man, really clean engine bay!!
That passenger side front valve cover "fitting" should be a PVC valve plumbed just like you have it going into the carb.
I don't either, only a breatherI see no PCV valve.
Well a 268 is pretty big for a teener, and it's gonna want some bypass air alrightee.
Ok so first things first get a PCV and grommet plumbed in there and a decent breather on the other side. There's nothing wrong with the oiled filter you have on there now, except a few hours after installing it on a running engine, the oil will have all been sucked out of it, and the filter will now start to pass dirt. And whenever you go WOT, blowby will flow backwards through the filter and puke oil-mist all over your valve cover,and then the dirt will stick to that. So, if the breather on the passenger side passes air in both directions then use it and shelf that little one on the passenger side. Ideally the new breather should be plumbed to inside the filter house,between the filter and the air-horn. I know, I know , that's a PITA. So What you can do is install an exit hose on the breather nipple about a foot long and point it anywhere except down.Then the blowby will mostly leave it's oil in the filter or in the hose where it can drain back. But make sure both access points in the covers are baffled inside. The breather will require maintenance.
After this,the engine will require a retune.
Thanks againDon't be in a hurry to drop the oil that is in there now, it's good stuff.
Rotella T comes to mind, for the next oil change. Read up on it.
Why would you drop the good synthetic oil for a low to no zinc diesel engine oil?Don't be in a hurry to drop the oil that is in there now, it's good stuff.
Rotella T comes to mind, for the next oil change. Read up on it.
I put some links in post#19 for ya