Crank Case Breather probs ( n.b. Daftlad)
Discussion
Further to my numerous posts regarding fumes entering the cabin on my 1600M, and the many replies I have received - I have discovered yesterday having spent weeks sealing the exhaust and replacing gaskets etc that the fumes are in fact coming from the crank case breather (as mentioned by daftlad) I have a catchtank mounted just above the fuel pump and a pipe then exits into the carb, it would appear that the fumes (hazy mist)are escaping from both areas i.e. where the catch tank meets the block but also where the pipe exits towards the carb - has anyone come across this before and how did you overcome it.
P.S.
Compression is ok so don't think I have a broken ring problem.
Cheers
P.S.
Compression is ok so don't think I have a broken ring problem.
Cheers
Hi Graham
The easiest way to fix it is to get rid of the catch tank and take a pipe straight from breather to the carb. Check the breather valve is working by taking it out turn it upside down and push the middle part in, it should return easily, if it doesn't then try cleaning in petrol and if it still does not return then its time to get a new one.
If however none of the above works due to the engine being somewhat worn then the old cheat is to take a long pipe from the breather, route it down under the car with cable ties and cut it off near the back of the car (but not in front of one of the rear tires
) this way everyone else suffers your fumes and not you.
Cheers Drifting
The easiest way to fix it is to get rid of the catch tank and take a pipe straight from breather to the carb. Check the breather valve is working by taking it out turn it upside down and push the middle part in, it should return easily, if it doesn't then try cleaning in petrol and if it still does not return then its time to get a new one.
If however none of the above works due to the engine being somewhat worn then the old cheat is to take a long pipe from the breather, route it down under the car with cable ties and cut it off near the back of the car (but not in front of one of the rear tires
) this way everyone else suffers your fumes and not you. Cheers Drifting
Don't, I repeat Don't take a pipe straight from the block to the inlet manifold. At best you will severely restrict performance and at worst you could injest oil directly to the piston crowns in the event of an overfilled sump.
Your engine runs with a PCV valve at the end of a strainer (the black bit that sits in the block.
if you want to cure your fume problem you have two options.
1. renew all of the pipework and replace the PCV valve so that the conections are sound. (over a while the PCV valve in the rubber grommet on top of the strainer gets to be a sloppy fit)
2 the performance option.
Buy an elbow adaptor from Burton Products. This is an interference fit in the block and allows you to run a 1/2 pipe thereby bypassing a PCV. next purchase a 1ltr mocal alloy catch tank and fix to a suitable location. mine is a non servo MK2 vixen, so I fixed it in front of the pedal box in the engine bay. You will have 2 unions a breather cap and a sight glass on the catch tank. 1 union is connected to the elbow previously mentioned. the inlet manifold is blanked off with a blanking plug (B&Q) and the other union is either blanked or connected to a suitable elbow fitted to your rocker box cover.
This removes the foul air and oil mist from your inlet manifold which gives a cleaner mixture to burn and more power, since oil reduces the octane rating of fuel.
if your engine is suffering from valve wear then the rocker feed to the catch tank is a must to prevent oil being forced from the dipstick or other engine orifice.
Hope this is OK.
e-mail me off line if you need any further advice.
Neil.
Your engine runs with a PCV valve at the end of a strainer (the black bit that sits in the block.
if you want to cure your fume problem you have two options.
1. renew all of the pipework and replace the PCV valve so that the conections are sound. (over a while the PCV valve in the rubber grommet on top of the strainer gets to be a sloppy fit)
2 the performance option.
Buy an elbow adaptor from Burton Products. This is an interference fit in the block and allows you to run a 1/2 pipe thereby bypassing a PCV. next purchase a 1ltr mocal alloy catch tank and fix to a suitable location. mine is a non servo MK2 vixen, so I fixed it in front of the pedal box in the engine bay. You will have 2 unions a breather cap and a sight glass on the catch tank. 1 union is connected to the elbow previously mentioned. the inlet manifold is blanked off with a blanking plug (B&Q) and the other union is either blanked or connected to a suitable elbow fitted to your rocker box cover.
This removes the foul air and oil mist from your inlet manifold which gives a cleaner mixture to burn and more power, since oil reduces the octane rating of fuel.
if your engine is suffering from valve wear then the rocker feed to the catch tank is a must to prevent oil being forced from the dipstick or other engine orifice.
Hope this is OK.
e-mail me off line if you need any further advice.
Neil.
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