24in of vacuum at idle too high for the 2.8L?

[franklin2]

I was reading in the "How to Build and Modify Ford V6 Engines" and he said there is one oil gallery that feeds the rocker shaft and all the components under the valve cover.

 

[SgtDan94]

I was reading in the "How to Build and Modify Ford V6 Engines" and he said there is one oil gallery that feeds the rocker shaft and all the components under the valve cover.

Ok, that makes sense. I wonder why it is then that the middle cylinder is having such an issue when you can see that the other two are getting oil, and are atleast not corroded. The ticking is loud. Too loud. And gets worse the longer I drive.

 

[franklin2]

Here's a link to a another forum where a guy was working on a pinto 2.8.

Ford Cologne 2.8L V6 oiling issues

Anyone playing with the Ford Cologne V6? I have one here that isn't getting oil to the LH rocker shaft. Motor's a fresh reman with good oil pressure. The RH bank is getting great oil, as good as none to the LH side. I'm trying to figure out the oil system to the rocker shaft. I see that the...

www.hotrodders.com

 

[franklin2]

Ok, that makes sense. I wonder why it is then that the middle cylinder is having such an issue. The ticking is loud. Too loud. And gets worse the longer I drive.

I don't understand why it looks so crusty and rusted? Where did the water or moisture come from to create the rust? Is the water causing the sludge build-up with the oil also?

 

[SgtDan94]

I don't understand why it looks so crusty and rusted? Where did the water or moisture come from to create the rust? Is the water causing the sludge build-up with the oil also?

no, the oil Is clean, and there’s no other signs of water leakage any where else. The bronco did sit for 14 years, it’s possibly it built up condensation. However if that’s the case the. I don’t understand why it’s only the center cylinder that’s corroded. Im thinking that somehow the corrosion is what’s causing the tick

 

[SgtDan94]

I’m thinking that the rocker arm shaft is clogged up and starving the entire valve train of oil. It seams somewhat simple to remove and replace, I’m just going to go for it. Ill replace those two rocker arms while I’m at it. Worst case scenario, I put it back together and it still ticks.

 

[19Walt93]

That looks to me like you have either water or coolant in the oil. If the pcv system is plugged or restricted moisture can build up, that would be the good news. Otherwise a gasket failure or crack could be allowing coolant to ooze into the oil. Finding the source of the milk shake is first priority, the tick just slipped into second place.

 

[8thTon]

I dunno, the other two cylinders look well oiled with no corrosion. Does someone have an oil flow diagram for this engine? How do the outter rockers get oil and the center two not?

Does it require clearance to allow oil to get out? I know I've seen that on other engines where it squirted out oil when the pushrods had no force on them at th base circle of the cam.

 

[SgtDan94]

I dunno, the other two cylinders look well oiled with no corrosion. Does someone have an oil flow diagram for this engine? How do the outter rockers get oil and the center two not?

Does it require clearance to allow oil to get out? I know I've seen that on other engines where it squirted out oil when the pushrods had no force on them at th base circle of the cam.

From what I understand, oil is fed into the rocker shaft through the center bolt, and then Travels to each end.. from the shaft, the oil travels through the front hole that you can see on the rocker arms, then travels down each rocker arm and onto the valves. I believe the corrosion is clogging these holes on the center rocker arms.

There is corrosion because the bronco sat stagnant for 14 years with alot the vacuum/ breather lines unplugged. There is no water in the oil

 

[8thTon]

From what I understand, oil is fed into the rocker shaft through the center bolt, and then Travels to each end.. from the shaft, the oil travels through the front hole that you can see on the rocker arms, then travels down each rocker arm and onto the valves. I believe the corrosion is clogging these holes on the center rocker arms.

There is corrosion because the bronco sat stagnant for 14 years with alot the vacuum/ breather lines unplugged. There is no water in the oil

I'd probably pull that rocker assembly off and clean up the parts - the center two at least, then readjust and do a compression check. If it had no clearance it could have a burned exhaust valve. Looking again it does seem to have oil, it's just ugly.

 

[SgtDan94]

@8thTon @franklin2 @19Walt93

So, I removed the rocker assembly and cleaned it up really well, here’s an after picture

Nothing looked beat up, the shaft or holes were not clogged. Afterwards I re-adjusted everything very carefully with the feeler gauge. Started it up, of course it ticked at first because I cleaned a lot of the oil off in the process.. but then, it got quiet, and sounded really good!!

for a few minutes... no sooner than I started driving it, the tick came right back. At this point, I’m thinking that whoever did the last oil change put the wrong stuff in. My last attempt to fix the tick is going to be an oil change with 10W-30 and a high mileage treatment.

 

[SgtDan94]

I was also about to install a mechanical oil gauge... however I lost one of the two really tiny compression sleeves.. so that’s gonna have to happen another day. I don’t think oil pressure is an issue though

 

[8thTon]

Can you use a piece of tubing to tell where it's coming from at all?

Also an exhaust leak can sound an awful lot like a tap - given the time/heat characteristic it might be a good possibility.

 

[SgtDan94]

Can you use a piece of tubing to tell where it's coming from at all?

I’m only 75% sure its coming from the valve train. I became just a little more certain today when I started it Up and it became quiet for a second, which has never happened as long as I’ve owned it. My next best guess would be the flywheel... it has a newer stater on it, however, is kind of has a screechy start. Just by ear, laying underneath, I could see the flywheel being a possibility

 

[SgtDan94]

The bronco passed smog just fine, it has a lot of power and runs good.