Oil coming outof dipstick

[Andy68coupe]

hi everyone,

i'm havin trouble with my 68 coupe ive redone the intake manifold gasket, replaced the rocket cover gasket, transmission gasket, and sump gasket becuase they all had leaks. Put a new breather and pcv valve in but yet when the car is under load oil is still coming out of the dipstick but no smoke is coming out the exhaust so i am stuck with no smoke there can't be a bad piston ring??? my pvc hose goes to the back of the carby is that right??

i'm at a loss so any help is muchly appreciated

cheers andy

[Frank70]

Hey Andy.

I think you pvc hose needs to go the intake manifold - not the carby. Check that.

You may also have another hose to the air cleaner , but not to the carby I don't think.

also make sure if it working and installed correctly so the flow is to the intake. Also check it's the right pvc for your engine. If it is not, then it can flow too much or not enough air out of the crankcase.

Cheers,
Frank.

[Andy68coupe]

hi frank i dont have the breather hose anymore i got rid of it and put a pod breather. i got the pcv from east coast mustangs down in melbourne and they said it would be fine.

i dont know ill check those things.

[68Coupe]

Hi, the hose from the pcv valve attaches to the base of the carby. If you are getting oil coming from your dipstick the pcv valve may not be functioning correctly.

[Frank70]

Hi Andy.

Well if you have a pod pvc breather from East Coast Mustangs, then it must be OK .

so it will be something else ... you don't just have too much oil in there ?  Cant think what else could cause that.

Cheers,
Frank.

[Frank70]

Andy.

If it's not simple , ie. pvc or oil overfill , or  you may want to change the oil and filter if you didnt already do so just in case the dipstick is wrong or reading wrong. then put the 5 or 6 litres of oil as required.

otherwise, then yes you may have a piston leak or piston ring leak.

You can check that pretty easily by cranking  the engine over to top dead centre (tdc) and then removing a spark plug and with a compressor blow 100psi into the cylinders one by one. IF you hear the air escaping past the cylinder, heads, and into the intake / carby then you have a problem.

Cheers,
Frank.

[Andy68coupe]

thanks mate oil filter is new and if anything might have less oil. doesnt quite meet half way on the dipstick, because i keep loosing it.. hahaha

[shaunp]

If it's coming out the top of tube and it has a bit of felt there, and the PVC is working correctly I'd say it got plenty of blow by ie the compression rings are toast, this doent mean it will blow smoke, This can often happen on an old engine if you reco the heads, the oils ring can work fine but the top ring lets the compression by. Whne the engine is runing at fast idle the vac from the pcv should suck a bit of paper on to the rocker caver with oil filler cap off. That's how you test it.

[Macka]

It sounds like the rings are shot and compression is getting past them into the crankcase. 

Do a compression test on each of the cylinders and see what you get...  Its easy.   

[Bumblebee]

It sounds like the rings are shot and compression is getting past them into the crankcase. 

Do a compression test on each of the cylinders and see what you get...  Its easy.   

That is exactly the condition of the original motor my convertible had, and out she went!

[66 Stang]

Mine did the same thing, only out the breather cap on the rocker cover,

so out she came and did a full rebuild on her 

[Bumblebee]

Mine did the same thing, only out the breather cap on the rocker cover,

so out she came and did a full rebuild on her 

You are more talented and patient than I am!!!

[Andy68coupe]

thanks guys the thing i dont get is that it runs really well and there isnt really any symtoms apart from the dipstick.

[66 Hertz]

save yourself any further anguish and do a compression test!
then you will now one way or another

[GLENN 70]

Compression rings are shot and most likely the pistons skirts are cracked and compression is going into the sump . If you just want to drive it as is and not fix it ,take your valve covers off and fit to more breathers and slide a tube over the dip stick tube ,a couple of 100 mm long to stop the oil coming up .You can just take it off to check the oil level . If you dont relieve the compression into the sump you will blow out gaskets and always oil leaks . Or rebuild the engine .

[Andy68coupe]

sounds like an engine rebuild is on the cards.. where is a good supplier for pistons and rings things???

cheers

[Macka]

Its not a hard test to complete.  Other symptoms would be that the car is down on power.  If it is its not a big job to rebuild her.

The other end of this is the oil that ends up on the road.  It only needs a small bit to bring a motorcycle down and cars generally drop it on big bumps in the road or sitting at lights prior to intersections.  A very dangerous place for any oil to be leaked onto the road.

[GLENN 70]

Pistons and ring things ,not quite that easy .A full strip down and rebuild is on the cards .

[Andy68coupe]

where would you recommend getting a complete rebuild kit???

[Andy68coupe]

why is piston and rings not all you have to do seein as that could very well be the problem??? i it goin to fix the problem for a while as i am looking at replacing the original heads and intake manifold and cam and all that stuff in the next year or so???

[GLENN 70]

Sorry but it does not work that way . At best you have only have to hone the bores and fit new rings .To pull the pistons you will be pulling the engine out and apart ,then it does not stop there ,oil pump , timing chain set, bearings and maybe a crank grind etc . The windsor pistons will most likely be cracked .  Get the engine breathing better and see how it goes and start saving for a rebuild or a crate motor, that may end up being a cheaper way to go .

[Macka]

Andy, where are you ...  it's not on your listing?

[shaunp]

why is piston and rings not all you have to do seein as that could very well be the problem??? i it goin to fix the problem for a while as i am looking at replacing the original heads and intake manifold and cam and all that stuff in the next year or so???

Do a compression test first dry and wet, this  will confirm crook rings or not, in real terms you will do a full rebuild once you strip, cam lifters bearings, may as well put hard seast in the heads etc or get some aftermarket ones. You can do a car yard re-ring job ie quick hone, new rings, and big ends, you can do that in the car, but I don't think that's what you really want long term.

[Andy68coupe]

Andy, where are you ...  it's not on your listing?

i'm in narooma down the far south coast nsw.

[Andy68coupe]

Do a compression test first dry and wet, this  will confirm crook rings or not, in real terms you will do a full rebuild once you strip, cam lifters bearings, may as well put hard seast in the heads etc or get some aftermarket ones. You can do a car yard re-ring job ie quick hone, new rings, and big ends, you can do that in the car, but I don't think that's what you really want long term.

thanks shaun. like i said in the near future i want to pull the engine out and work it. but i have only just really brought the car so i would like to have a bit more time tidying it up and driving it before i pull the engine out. so will rings and pistons do for 6 to 12 months??