I Got A Leak - Oil

[BeMyWay]

I found the following leaks at the front and rear of the engine recently.  They are not dripping (yet), just wet for the moment.

 

I checked the distributor housing and the oil sender and they are both dry.  

 

Seems to be coming from between the head and block...sound like work coming on...

 

Anyway, if any of you have any advice, it would sure be appreciated.  

 

Edited April 1, 2017 by BeMyWay

[Mike Self]

Just think of it as a factory anti-rust device.

 

It may well be coming from the distributor housing where it bolts to the cylinder head.  Also, one of those bolts that holds it on leads to an oil passage, and should have a crush washer on it.  Perhaps yours is missing.  

 

mike

[Son of Marty]

It looks like you may have a couple of leaks one by the chain tensioner/ front cover and one toward the rear of the engine. I would try to clean the area as well as I could so you can get a good read on the exact spot its leaking.

[TobyB]

Front cover, for sure.

THe tensioner can leak oil out of the cap if the crush washer underneath is damaged

And I vote for an exhaust stud or 2 in back.

But look at the distributor housing- they don't usually leak

where they bolt to the head, but the o- ring can get nicked on

the distributor itself, the pressure sender can leak, or leak where it's sealed,

and the valve cover can always leak.

 

As SoM say, clean, clean, clean, clean, clean....

 

t

[BeMyWay]

I will get her cleaned up again and then do the forensic on where  these leaks are originating from.

 

That is weird that an exhaust stud enters an oil gallery...???  I will check on the status of these also.  

 

I have been driving it like my brother owns it. 

 

Thanks for the advice.

Edited April 2, 2017 by BeMyWay

[BeMyWay]

I did a beginning clean and got some shots of the offending area. 

 

 

Is the bolt/nut on the header, under spark plug #1, is it connected to an oil passage?  If so, is this a possibility why there is oil leaking due to crankcase pressure?
Thanks
 

Edited April 3, 2017 by BeMyWay

[Son of Marty]

The top row of studs go into the head by the valve springs and are exposed to oil the bottom row all the holes are dry.

[Stevenc22]

Some of the exhaust manifold studs are threaded into oil passages. You need to remove the exhaust manifold, clean the holes with alcohol and Qtip and the reinstall the studs with loctite to make the holes oil tight again.

[BeMyWay]

After cleaning and then driving it, I see there is a leak at the rear of the head/block area:

 

 

The front seems to have a small leak over the chain tensioner. 

 

 

[BeMyWay]

11 hours ago, Stevenc22 said:

Some of the exhaust manifold studs are threaded into oil passages. You need to remove the exhaust manifold, clean the holes with alcohol and Qtip and the reinstall the studs with loctite to make the holes oil tight again.

 

I was confused about where these bolts were located...thanks.

 

11 hours ago, Stevenc22 said:

Some of the exhaust manifold studs are threaded into oil passages. You need to remove the exhaust manifold, clean the holes with alcohol and Qtip and the reinstall the studs with loctite to make the holes oil tight again.

 

I guess I will need to remove the head and replace the head gasket.

['76mintgrün'02]

Just curious, are you using 20w-50 oil?

[BeMyWay]

 

25 minutes ago, '76mintgrun'02 said:

Just curious, are you using 20w-50 oil?

 

I do not know...this is my son's car and he just brought it home when i found these leaks.  

 

I will look into this.  If I cannot tell the viscosity, then I will change it out and see what happens. 

[TobyB]

I wouldn't be pulling the head just yet- there is no oil under pressure at the back of the head on the exhaust side.

There is a collection 'trough', but it just doesn't usually leak.  I suppose there's always an exception, but

the usual spots are the studs.

They DON'T go to a 'passage' they're just open to the top of the head.  But the threads break through into the oil- splashed

valve 'chest' in such a way that oil sits in the little pockets that are open- and gravity and heat does the rest.

You'll be pulling the exhaust manifold anyway to do the head- I'd pull the manifold, and look at each stud- I'll bet 1 or 2 are caked

in partially burned oil from the leak. And I'll almost guarantee they come out of the head...

 

Likewise, the front cover can come off and get resealed pretty easily.  And maybe a new crush washer for the plug at the end of the chain tensioner

turret, just for good luck?  And while you have the plug off, you can inspect the turret carefully- they do get damaged or ocasionally, cracked.

The oil in there IS somewhat pressurized by the chain slap, so that plug needs to be well- sealed.

 

what I keep finding, anywho,

 

t