Richard Craig Posted July 12, 2010 Report Share Posted July 12, 2010 (edited) Hello all! Over the past few uses, my car seems to be pushing a lot of stemy deposits out of the breather pipe that comes from the block. It's getting so bad that it fills the cockpit with steamy fumes and leaves a smokescreen (steamscreen?) behind the car. Any ideas on how to rectify the problem? Apart from that, the car's running really well and am still enjoying it as much as ever! Cheers Richard Edited July 13, 2010 by Richard Craig Quote Link to post Share on other sites
Alec Pringle Posted July 12, 2010 Report Share Posted July 12, 2010 Hi Richard, that doesn't sound too healthy ! Is the breather cap on the rocker cover OK, as in not gunged-up ? Is there any 'mayonnaise' visible inside the rocker cover when you remove the cap ? How does the oil on the dipstick look ? And is there any sign of oil in the water, cooling system ? Cheers, Alec Quote Link to post Share on other sites
Richard Craig Posted July 13, 2010 Author Report Share Posted July 13, 2010 Hi Richard, that doesn't sound too healthy ! Is the breather cap on the rocker cover OK, as in not gunged-up ? Is there any 'mayonnaise' visible inside the rocker cover when you remove the cap ? How does the oil on the dipstick look ? And is there any sign of oil in the water, cooling system ? Cheers, Alec Hi Alec, Thanks for the quick reply! There is no mayonnaise visible inside the rocker cover, nor is there any on the dipstick. There isn't any sign of oil in the water as far as I can tell. Regarding the breather cap - with use, the car always seems to leak a little oil out here and it resides around the lips of the rocker cover. Is this normal? It's difficult to tell how gunged up the cap is, should I just buy a new one? Rgds Richard Quote Link to post Share on other sites
TR 2100 Posted July 13, 2010 Report Share Posted July 13, 2010 Hi Alec, Thanks for the quick reply! There is no mayonnaise visible inside the rocker cover, nor is there any on the dipstick. There isn't any sign of oil in the water as far as I can tell. Regarding the breather cap - with use, the car always seems to leak a little oil out here and it resides around the lips of the rocker cover. Is this normal? It's difficult to tell how gunged up the cap is, should I just buy a new one? Rgds Richard Hi Richard, It sounds like your pistons rings leave a little to be desired. The crankcase ventilation was not really adequate with just the single breather pipe and vented filler cap, that's why they added a breather to the rocker cover on later cars (that's later 4s and 4As) Without it, there is pressure in the rocker cover, that explains why you have some leakage round that area. A new gasket would help, and make sure the rocker cover lip is not bent up too much, limiting the seal against the head. This does happen over a period of time. Fitting the later rocker cover, vented to the inlet manifold would help reduce the emissions from the breather pipe, but I think you have to work towards new rings. How are your compressions? If they are down, just think about the extra power you will get by replacing the rings - there's your incentive. Without Quote Link to post Share on other sites
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