What is this for?

[my69S1]

What is this for and where does it get hooked up?  I have seen other pics with a hose running from this end to back behind the engine but I never see where it actually goes.  I've looked and I see no obvious place where the other end of the hose would go.  Any help and pics especially would be appreciated.  Thanks.

[Richard Fridd]

Crankcase breather return from oil filler canister?

[Jaydub]

As Richard said, it connects to the Oil filler canister and takes the fumes from the cylinder head camshaft cavity back into the intake system.

[my69S1]

So it hooks up to this?

[lancialulu]

Make sure the innards haven’t turned to rust! Before fitting at least bang it hard down and see if any bits fall out. It does actually look as if some has taken it to pieces in the past so maybe ok. It bolts to an alloy casting that bolts to the back of cylinder head

[my69S1]

Thanks.  Yes, I took mine apart and it was full of rusty dust.  Replaced with stainless scrubbing pad.

My oil filter canister hose is currently hooked up to a union and banjo bolt at the very end of the intake manifold as seen in the attached picture.  The parts manual shows a union and banjo bolt at that location so it must go somewhere else?

[dhla40]

That union is normally for the brake servo, do you have one? Also your no 4 cylinder must surely be running very weak.

Sean

[my69S1]

That union is normally for the brake servo, do you have one? Also your no 4 cylinder must surely be running very weak.

Sean

Thanks Sean.  The entire brake system was replaced with a Wilwood system by a PO, as was the entire electrical system.  I am still going through what is different to determine if anything is missing.  Why would the no 4 cylinder be running weak?

[lancialulu]

That union is normally for the brake servo, do you have one? Also your no 4 cylinder must surely be running very weak.

Sean

As Sean points out that is the vacuum take off for a brake servo so it sucks directly into the inlet port of n4 cylinder. Where does that rubber pipe go as in an earlier pictur it does not go it the air filter box (missing pipe in photo).

Thanks Sean.  The entire brake system was replaced with a Wilwood system by a PO, as was the entire electrical system.  I am still going through what is different to determine if anything is missing.  Why would the no 4 cylinder be running weak?

[my69S1]

That union is normally for the brake servo, do you have one? Also your no 4 cylinder must surely be running very weak.

Sean

As Sean points out that is the vacuum take off for a brake servo so it sucks directly into the inlet port of n4 cylinder. Where does that rubber pipe go as in an earlier pictur it does not go it the air filter box (missing pipe in photo).

Thanks Sean.  The entire brake system was replaced with a Wilwood system by a PO, as was the entire electrical system.  I am still going through what is different to determine if anything is missing.  Why would the no 4 cylinder be running weak?

That rubber pipe goes to the oil filter canister.  If there is a vacuum, then it is sucking air from the oil filter canister.  Would it be better if I just plugged that hole (removed the union and banjo bolt and replaced with a sold bolt) and ran the air filter canister hose to the intake manifold as it should be?

[SanRemo78]

If the pipe is superfluous then remove it and blank the hole in the filter housing off. Otherwise you've got unfiltered air going through the carbs.....

Guy

[my69S1]

If the pipe is superfluous then remove it and blank the hole in the filter housing off. Otherwise you've got unfiltered air going through the carbs.....

Guy

Thanks Guy.  My intent is to run the hose from the oil filter canister to the back of the air filter as it should be.  However, what do I do with the hose coming from the end of the intake manifold which would normally be hooked up to the brake servo.  Can I just blank this hole on the intake manifold.  That seems the obvious choice since I don't have a servo but I just want to make sure that is OK.

[SanRemo78]

Definitely black the intake manifold take-off port otherwise that cylinder will be taking a much much leaner mixture than the other 3! leaving it open will eventually lead to damage to the engine.

[my69S1]

Thanks for the assistance.  I will install a hose between the air filter and oil filter canister as it should be and block off the hole on the intake manifold.

[Wangler]

Nothing to do with your question, but I would certainly replace the clear plastic pipe between the carbs and use proper petrol resistant pipe secured by “jubilee” clips or the much neater SINGLE ear Mikalor clips. Apologies if you’ve already done this.