The Ford Barn - View Single Post - Filter oil return through hollow bolt on pump stand

Mart · 01-18-2016, 02:48 AM

^ That may have been me. I found that the stock V8 Pilot and other (possibly non US) location half way up the side of the pump stand base was squirting hot oil straight across the filler tube. I had a blowby problem and the hot oil was being ejected and making the problem a lot worse.

I plugged the factory hole in the side of the stand and made a banjo bolt from a drilled out 5/16 UNC bolt. I then used a metric brake banjo fitting (from a Skoda of all things) and found that a 1/8 NPT fitting screwed into it well enough to seal. There is no pressure at this joint, just a return. The existing return pipe was rerouted into the new banjo fitting. The metric fitting had a M10x 1mm pitch thread.

The new setup did not suffer from oil ejection from the filler as the oil enters the valve chamber outside of the baffle tube. As long as the two baffle tubes are in place and the manifold has a through hole, the system works well.

I'll dig out a photo and post it here.

Not saying it is best practice, but in my case it was preferable to a timing cover location because the oil filter is bulkhead mounted and all the pipework was already in that rearward location.

Mart.

Edit: I found the post and have pasted it in below:

Here's the latest.

There's a secondary aspect that I have been mulling over. My bypass filter feeds back to the engine at the fuel pump stand. I took the cap off last night and could see the oil flowing into the stand and running down the baffles. Imagine that happening at high revs, (more flow??) with lots of air trying to rush up past it, and it's bound to pick some up and carry it along in the air.

Probably another reason it was as bad as it was.

I reworked the oil return from the bypass filter this afternoon.
Check this video:

https://www.youtube.com/watch?v=KzP0u5L4_WE

You can't see the oil stream from the return, but you can see the wetness down there and the way the oil gets picked up as I rev it.

So I replaced the fuel pump stand for one without the (Ford original) return boss.

To allow the oil to be able to return I needed a route that would not require engine or sump removal. I hit on the fuel stand bosses - at least on this manifold they are through drilled into the valve chamber. Importantly they are outside, rather than inside the filler tube extension that goes straight down to the crankcase.

I made a special banjo bolt:

I'm really digging my little Myford lathe!

And utilised a handy brake banjo (salvaged from a Skoda (of all things) in the scrap yard ages ago)

And reworked the existing return pipe to suit.

The oil filler is now nice and dry:

This is after a good run around with plenty of wide open throttle and high rev usage.

The oil filter and return pipe were nice and hot - which to me indicates there is plenty of flow.

I'm now quietly confident that with the PCV in place and the modified oil filter return my oil ejection problems will be solved.

I get a kick out of coming up with solutions to problems - to me that's what Hot Rodding is all about.

Mart.

01-18-2016, 02:48 AM	#12
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,766	Re: Filter oil return through hollow bolt on pump stand ^ That may have been me. I found that the stock V8 Pilot and other (possibly non US) location half way up the side of the pump stand base was squirting hot oil straight across the filler tube. I had a blowby problem and the hot oil was being ejected and making the problem a lot worse. I plugged the factory hole in the side of the stand and made a banjo bolt from a drilled out 5/16 UNC bolt. I then used a metric brake banjo fitting (from a Skoda of all things) and found that a 1/8 NPT fitting screwed into it well enough to seal. There is no pressure at this joint, just a return. The existing return pipe was rerouted into the new banjo fitting. The metric fitting had a M10x 1mm pitch thread. The new setup did not suffer from oil ejection from the filler as the oil enters the valve chamber outside of the baffle tube. As long as the two baffle tubes are in place and the manifold has a through hole, the system works well. I'll dig out a photo and post it here. Not saying it is best practice, but in my case it was preferable to a timing cover location because the oil filter is bulkhead mounted and all the pipework was already in that rearward location. Mart. Edit: I found the post and have pasted it in below: Here's the latest. There's a secondary aspect that I have been mulling over. My bypass filter feeds back to the engine at the fuel pump stand. I took the cap off last night and could see the oil flowing into the stand and running down the baffles. Imagine that happening at high revs, (more flow??) with lots of air trying to rush up past it, and it's bound to pick some up and carry it along in the air. Probably another reason it was as bad as it was. I reworked the oil return from the bypass filter this afternoon. Check this video: https://www.youtube.com/watch?v=KzP0u5L4_WE You can't see the oil stream from the return, but you can see the wetness down there and the way the oil gets picked up as I rev it. So I replaced the fuel pump stand for one without the (Ford original) return boss. To allow the oil to be able to return I needed a route that would not require engine or sump removal. I hit on the fuel stand bosses - at least on this manifold they are through drilled into the valve chamber. Importantly they are outside, rather than inside the filler tube extension that goes straight down to the crankcase. I made a special banjo bolt: I'm really digging my little Myford lathe! And utilised a handy brake banjo (salvaged from a Skoda (of all things) in the scrap yard ages ago) And reworked the existing return pipe to suit. The oil filler is now nice and dry: This is after a good run around with plenty of wide open throttle and high rev usage. The oil filter and return pipe were nice and hot - which to me indicates there is plenty of flow. I'm now quietly confident that with the PCV in place and the modified oil filter return my oil ejection problems will be solved. I get a kick out of coming up with solutions to problems - to me that's what Hot Rodding is all about. Mart. Last edited by Mart; 01-18-2016 at 03:00 AM.