oz 250 head on I6 200 blowing smoke

[uncle Mike]

My new 65 mustang is blowing smoke. with the pvc hooked up smokes pretty bad unhook pvc no smoke.
with pvc unhooked oil blows out the breather cap. it is a aftermarket valve cover no baffle under pvc.
So do I just replace valve seals or should I pull the head and send it out for rebuild. other than smoking and oil consumption motor runs pretty well.

 

[B RON CO]

Hi, I would do a compression test on the engine and post the results. Good luck

 

[bubba22349]

you could try another valve cover that has the baffling and maybe use one of the adjustable PCV valves. X2 on doing a compression check to determine the engines condition. Good luck

 

[CZLN6]

Howdy Mike and All:

How many miles since this head was rebuilt. Were the valve seal replace then? Does it smoke more on start up? or after deceleration? A compression test is always a good idea when diagnosing.

Keep it coming.

Adios, David

 

[OpelGT+3point3]

Sounds like it's a simple matter of oil being drawn into the intake. Gotta have pcv baffles. If it idles smooth, I'd go right after the baffles.

 

[chad]

"...blowing smoke…"
out the tail pipe or frm the top end of motor?

"...with the pvc hooked up smokes…" (out the tail pipe or frm the top end of motor?)
is it hooked up right?

 

[uncle Mike]

it blows smoke from the tailpipe with pvc connected blows oil through breather cap with pvc disconnected
did a vac test needle bounces between 14 & 20 at idle needle bounces between 18 & 20 when throttle increased
going to do compression test soon as I get right adapter will post the results

 

[uncle Mike]

this car is new to me so don't Know when head was rebuilt ETC. the PO had taken this car in trade but he was a mopar guy so it sat in his driveway he did nothing to it and didn't no anything about its history or what it was all he Knew was it was 6 cylinder with some "weird head on it"

 

[chad]

wanna read this right, no period or comma or other clarifier...

"It blows smoke from the tail pipe with the PCV connected. When I disconnect the PCV system, oil comes shooting out of the 2 top valve cover openings."

The baffels under the frnt & rear VC openings help...
What head is on there. Pic help, HEAD casting numbers help ID heads.
Is the head alu? (U say "Oz Head" in the subject line).

Do folks know - a '65 still have a road draft tube?
If not it is a totally closed system (frnt & rear VC openings go to the carb/intake). Ck hoses for crimps/clogs, get new PCV valve,...+

 

[uncle Mike]

it is a cast iron australian 250 head casting # ARD10E 6049 AC
it has a bolt on alloy intake manifold casting # 72DA-9425-AA
the vac line comes of a port on the manifold below the carb. I replaced the pcv with new one same result.
with pcv connected smoke out the tailpipe. tried no pcv just a breather cap after driving oil pooled on valve cover below breather caps and cap was oil soaked.

 

[chad]

I'm not familiar with that head.

Is there a second line back from the other end of the
head/VC to the carb/intake to make a "closed system" (circulate the
'gases'/oil saturated air/crankcase gas/etc) back thru w/the fresh so
it all gets burned?

Sounds like U got it spittin rather than suckin. Some type of clog
rather than a nice continious flow...

Hummmm…a 250 head on a 200….Beyond ME…
Guys…….??

 

[RichCreations]

it is a cast iron australian 250 head casting # ARD10E 6049 AC
it has a bolt on alloy intake manifold casting # 72DA-9425-AA
the vac line comes of a port on the manifold below the carb. I replaced the pcv with new one same result.
with pcv connected smoke out the tailpipe. tried no pcv just a breather cap after driving oil pooled on valve cover below breather caps and cap was oil soaked.

Sounds like some serious blowby (rings?) or possibly worn valve guides...

 

[cr_bobcat]

Try putting an oil catch can in the system. There are cheap versions to try to see if it helps. If it does, you could install a better one later. The one I run loo just like an oil separator for an air compressor. Doesn't hold much, but you'll know pretty quickly if that's what is going on.

 

[Econoline]

I agree compression and leak down tests will tell you a lot.