welding project Juular's Scandi Noir. Volvo C70, 240 &122. Your 1960s environmental concerns are our concern.

[Supernaut]

That's two separate people I know who went to Errol this weekend without mentioning it beforehand. Cheers!

Anyway, my Powerflow drone box was posted away to a buyer somewhere in Englandshire weeks ago. I've been enjoying the bog standard rear silencer sourced from Poland since September.

[juular]

48 minutes ago, Supernaut said:

That's two separate people I know who went to Errol this weekend without mentioning it beforehand. Cheers!

There was a thread, which is where we found out. 

 

[Saabnut]

Indeed @Supernaut I even put it in its own thread so it would not get lost! I attend most Errol classic  auctions with the Tayside club.

[Supernaut]

Well, balls.

Perhaps I should try looking harder!

[Sunny Jim]

Fair play for your tenacity getting the timing chain on the Trafic done 👍 

A view like the one where you'd just removed the front end gives me the fear - I wouldn't know where to start on a modern engine like that.

Good to hear that you've got the Amazon back to a place where you're enjoying it too. 

[juular]

A small job with hopefully a large improvement.

The silicone gasket completely sorted the perpetual valve cover oil leak on the Amazon, but I was still getting the occasional whiff of oil vapour. I figured the reason for this was probably the crankcase breather 'system', which on this car involves nothing but lots of fresh air. 

On the side of the block there's a flame trap and a pipe going out and under the car.  But the intake for the breather is actually the oil filler cap which has an internal filter and is open to the atmosphere. 

I'm thinking that when I am flat out / high rpm this breather isn't handling the crankcase gases adequately and some is being burped back up into the engine bay and thus into the cabin via the scuttle.

Here's the disassembled cap.

 

 My plan here is to upgrade this to the later filler cap that takes air from the pancake filter on the front carb.

Firstly, a clean.

Then welding on a bit of tube.

Then sealing up the intake on the cap, which in this case is the underside of the petals.  I'm using foil tape as a proof of concept, I'll bung it up with sealant at a later date if this all works.

Finally, a bit of hose between the cap and the filter.

So far this seems to have improved the bad smells. I still get an occasional whiff when I come to a stop, but I think that might just be the side breather pipe gases being blown around.

At some point I might replace the side breather pipe with a line to the intake manifold and a one way valve, creating an actual PCV style setup. Then I can apply for my green number plate.

[Westbay]

1 hour ago, juular said:

A small job with hopefully a large improvement.

The silicone gasket completely sorted the perpetual valve cover oil leak on the Amazon, but I was still getting the occasional whiff of oil vapour. I figured the reason for this was probably the crankcase breather 'system', which on this car involves nothing but lots of fresh air. 

On the side of the block there's a flame trap and a pipe going out and under the car.  But the intake for the breather is actually the oil filler cap which has an internal filter and is open to the atmosphere. 

I'm thinking that when I am flat out / high rpm this breather isn't handling the crankcase gases adequately and some is being burped back up into the engine bay and thus into the cabin via the scuttle.

Here's the disassembled cap.

 

 My plan here is to upgrade this to the later filler cap that takes air from the pancake filter on the front carb.

Firstly, a clean.

Then welding on a bit of tube.

Then sealing up the intake on the cap, which in this case is the underside of the petals.  I'm using foil tape as a proof of concept, I'll bung it up with sealant at a later date if this all works.

Finally, a bit of hose between the cap and the filter.

So far this seems to have improved the bad smells. I still get an occasional whiff when I come to a stop, but I think that might just be the side breather pipe gases being blown around.

At some point I might replace the side breather pipe with a line to the intake manifold and a one way valve, creating an actual PCV style setup. Then I can apply for my green number plate.

Does it need some sort of 'catch can' between the rocker box and the air filter? will it be pumping 'neat' oil vapour to the filter when hot ?

Just a thought ...

[juular]

15 minutes ago, Westbay said:

Does it need some sort of 'catch can' between the rocker box and the air filter? will it be pumping 'neat' oil vapour to the filter when hot ?

Just a thought ...

I've retained the mesh / wool filter material inside the cap, which is the same stuff as you'd find inside a catch can.  

As designed, the flow of gas is meant to go inwards to the filler cap only, so it shouldn't be a source of constant oil vapour, just the occasional burp. The exit pipe on the block is angled to the road in a way that it creates a venturi that pulls gases through when moving.

Here is the updated B18 system which I was aiming for, although I haven't connected it to vacuum (#3 below). That part is handled by the venturi.

 

[sdkrc]

6 minutes ago, juular said:

 

That looks remarkably like the plans for the inter-dimensional spaceship that were beamed down from space in the movie 'Signal' starring Jodie Foster. 

[Westbay]

Ah, thanks for that , so once '3' is connected should work as you expect. 👍

[juular]

15 minutes ago, Westbay said:

Ah, thanks for that , so once '3' is connected should work as you expect. 👍

Should still work as the side pipe is providing a pull via the venturi, just not as effective when stationary where #3 would be pulling a strong vacuum through the system.

That's the next step once I get hold of the right threaded fitting for the manifold, and the right side pipe with a vacuum takeoff.