Oil loss through breather pipe
- Thread starter tjcassar
- Start date
Thank you for your advise. Would it be possible to tell me what this valve you have purchase and installed is called? I have never seen one so a picture of one would be appreciated. I can go for a specific make of car or model!! My engine has been re sleeved with the larger liners. The pistons etc are new, so yes I agree, the excess breathing could be as a result of the engine being too new!! Would 500 miles be enough for the rings etc to bed in?? I wonder, probably needs a couple of thousand miles to be correct.
Cheers Tony
Cheers Tony
Not too sure if this is of any help. There is a rally on Elba towards the end of September. Lots of very knowledgeable people will be there. It has been known on previous rallies for bikes to have had top end rebuilds, gearbox
rebuilds and parts swapped. If you can make it you should contact the Italian rally organisers urgently.
rebuilds and parts swapped. If you can make it you should contact the Italian rally organisers urgently.
Oil oss through breather pipe.
Search eBay for PCV valve. There are lots to choose from. The one I used was item number 150450161457. It is described as used in:
"Capri MK1, Capri MK2, Capri MK3, Escort MK1, Escort MK2, Escort MK3, Escort MK4, Escort MK5, Escort MK6, Escort MK7, Fiesta MK1, Fiesta MK2, Fiesta MK3, Granada, Sierra
A new PCV valve to suit many Ford engines including X/flow, SOHC Pinto, DOHC 16v, etc.
This particular valve is a late type fitted to V6 24v Cosworth engines with a 90deg elbow fitted to it. This plastic elbow can be cut off and removed to leave a more common straight valve."
You may find one of these breathers on Malta as there seemed to be lots of old British cars over there.
I turned up a steel adaptor to fit the diameter of the valve at one end and a smaller diameter at the other to fit into whatever hose you are doing to use. I also used a valve cap with a threaded boss so that you can fit a banjo to put the hose on. This valve cap is shown as an ET24/3 on the Vincent parts drawings. It was used on the "D"'s. The spares company list a an ET24/6 breather cap. This may be the same thing.
There are some proprietary motorcycle breather kits on the market. Search on the internet for these.
It is difficult to say how long new rings, pistons and cylinder bores will take to bed in. There are too many variables, machined finish, materials , oil grade/type, operating conditions, etc. Put some more miles on when you can.
Search eBay for PCV valve. There are lots to choose from. The one I used was item number 150450161457. It is described as used in:
"Capri MK1, Capri MK2, Capri MK3, Escort MK1, Escort MK2, Escort MK3, Escort MK4, Escort MK5, Escort MK6, Escort MK7, Fiesta MK1, Fiesta MK2, Fiesta MK3, Granada, Sierra
A new PCV valve to suit many Ford engines including X/flow, SOHC Pinto, DOHC 16v, etc.
This particular valve is a late type fitted to V6 24v Cosworth engines with a 90deg elbow fitted to it. This plastic elbow can be cut off and removed to leave a more common straight valve."
You may find one of these breathers on Malta as there seemed to be lots of old British cars over there.
I turned up a steel adaptor to fit the diameter of the valve at one end and a smaller diameter at the other to fit into whatever hose you are doing to use. I also used a valve cap with a threaded boss so that you can fit a banjo to put the hose on. This valve cap is shown as an ET24/3 on the Vincent parts drawings. It was used on the "D"'s. The spares company list a an ET24/6 breather cap. This may be the same thing.
There are some proprietary motorcycle breather kits on the market. Search on the internet for these.
It is difficult to say how long new rings, pistons and cylinder bores will take to bed in. There are too many variables, machined finish, materials , oil grade/type, operating conditions, etc. Put some more miles on when you can.
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Just a thought here. Do not try to run in on either a semi synthetic oil or a fully synthetic oil. The word on the street is that the lubrication properties of these oils is so good that the engine will not be run in easily. Two new cars which I know of were both run in on normal oil until the first oil change after which synthetics were used and that was by the agent/vendors which perhaps confirms the above.
Thank you for advising me of this Elba rally. Actually I have been invited to it already by Giovanni Cabazzi but due to my son getting married at the same time, I reluctently had to decline this. I am all the same very gratefull for your advise. Cheers
tony
tony
Hi Norman, my bike only ever ran on semi synthetic and no problems with the new bores and pistons. If the bore job has been properly carried out there should be no excessive breather leakage,but when we built Petes engine from all new parts, including crank cases, we had a similar amount of oil spill from the breather to that which Tony is getting. Everything in the engine was standard, and all settings double checked for accuracy and still it leaked. Our own design of pressure relief breather completely cured the problem (or hid it) and 15000 miles later it is still ok.
It seems to me that Tony (who is an experienced owner of old bikes) has two options.
1) dismantle to check all is well, and possibly still have the leak or
2)fit a pressure relief system and enjoy the ride
I have seen much written about the evils of modern oils but can only say that I cover quite high mileages in many strange places and only ever run on 10/40 semi synthetic because you can buy it anywhere should you need it, and I have never had a moments concern about lubrication.
John
It seems to me that Tony (who is an experienced owner of old bikes) has two options.
1) dismantle to check all is well, and possibly still have the leak or
2)fit a pressure relief system and enjoy the ride
I have seen much written about the evils of modern oils but can only say that I cover quite high mileages in many strange places and only ever run on 10/40 semi synthetic because you can buy it anywhere should you need it, and I have never had a moments concern about lubrication.
John
Eddy,
Thank you so much for the pictures as well as the car/cars they are used on. I will certainly have a go at the car parts shops and see what turns out. Yes, I agree, some more miles will not do any harm. I intend to go on a rally around Torino Italy soon, this should put some 500 odd miles more on the bike. I have changed the oil now as I was not sure what oil was in the machine, I have used Silkoline 20:50 specifically produced for old engines, so this should be a mineral oil. Should be good to continue running in the engine. Actually, Eddy, my breathing problem is only noticeable as when the bike idles, oil is thrown out of the front breather, nothing else. I am not sure what happens when the engine is revving and on the move.
Cheers Tony
Thank you so much for the pictures as well as the car/cars they are used on. I will certainly have a go at the car parts shops and see what turns out. Yes, I agree, some more miles will not do any harm. I intend to go on a rally around Torino Italy soon, this should put some 500 odd miles more on the bike. I have changed the oil now as I was not sure what oil was in the machine, I have used Silkoline 20:50 specifically produced for old engines, so this should be a mineral oil. Should be good to continue running in the engine. Actually, Eddy, my breathing problem is only noticeable as when the bike idles, oil is thrown out of the front breather, nothing else. I am not sure what happens when the engine is revving and on the move.
Cheers Tony
Hi John, Can I be cheeky and ask you what type of breather valve you installed in Petes bike when you overcame the oil spillage problem through the front engine breather please. True, I have experiance of other Vintage bikes, but none at all of Vincents. So am all ears to learn and try to do things correctly.
Thank you for your input.
Tony
Thank you for your input.
Tony