Damn Oil!!

[Scott Larson]

Blinded with science PK, you nailed it!! It's controlling that pesky oil mist that seems to elude the average VX...

[Monstertrucker]

Is there anything else that could be causing raised crankcase pressure causing massive amount of oil to be pushed up into intake? Any thoughts??

Unless they've recently been replaced, your fundamental problem is probably more basic, i.e. worn out exhaust valve stem seals (and to some extent intakes as well but only if they're very badly worn).

With worn stem seals, excess oil runs down the valve stems into the combustion chambers, which is then burnt at startup making it smoke blue for a few seconds until it burns off. However, the exhaust gas (and excess oil) is also forced out of the top of the valve stem seals (under the spring retainers) and directly into the rocker/valve covers at high pressure, coating everything with said oily crud and carbon, (burnt oil).

Does it smoke blue on startup and at high revs? If not, either

A) I don't believe you.

B) Ignore me and check your plumbing or whatever they said.

[Ebenezr]

You all hit the nail on the head and this picture shows the inside of the common chamber (intake) bathed in oil mist from excessively blowby. My compression had sunk to 120 +- on all cylinders. Mfg specs say the minimum should not be less than 145! and feel this is where my HP loss was coming from. So I traded my VX.

[Scott Larson]

You all hit the nail on the head and this picture shows the inside of the common chamber (intake) bathed in oil mist from excessively blowby. My compression had sunk to 120 +- on all cylinders. Mfg specs say the minimum should not be less than 145! and feel this is where my HP loss was coming from. So I traded my VX.

Now THAT is some serious blowby!!! No wonder you decided to trade it in...$$$

[Ldub]

Now THAT is some serious blowby!!! No wonder you decided to trade it in...$$$

At least the butterflies & their associated control shafts were staying well lubricated...

[Monstertrucker]

Compression loss is usually due to poorly seating valves. As with the stem seals, it's the exhaust's that wear the most because of the heat that they're subjected to.

If you just have the heads rebuilt, (all gaskets and stem seals replaced and a fresh valve grind/hone), you'd be back to good as new.

Piston rings are the last thing that will cause poor compression, given the beating that the valvetrain gets and the size of the components/sealing materials used.

[Ebenezr]

Compression loss is usually due to poorly seating valves. As with the stem seals, it's the exhaust's that wear the most because of the heat that they're subjected to.

If you just have the heads rebuilt, (all gaskets and stem seals replaced and a fresh valve grind/hone), you'd be back to good as new.

Piston rings are the last thing that will cause poor compression, given the beating that the valvetrain gets and the size of the components/sealing materials used.

I almost pulled my heads to do a valve job but my mechanic had a method of pumping compressed air into the cylinders with the valves closed. He said if the valves were leaky then there would be an audible hiss. In my case he decided worn rings was the culprit. Years ago it was sort of a risk to do valves and not the rings as well because the firmly seating valves increased compression and worn rings allowed "more" blowby. Therefore doing a valve job only kinda didn't work well.

[p_justin13]

Ran sea foam in crankcase for about a hundred miles then changed oil and ran 1/3 a bottle through the pcv with engine at idle drove for a day about another hundred miles and ran another 1/3 of a bottle through the pcv again. Idle and acceleration is much smoother. Still getting strong smell oil in exhaust when i gun the throttle. Also does anyone else vx rev really high on startup. Like 1500-2000 rpm for a minute or so then goes back down to normal 700-900. I still have to replace manifold gaskets. Not really leaking yet but around that time. Scared to see what I find when I do.