josh18 Posted September 22, 2014 Share Posted September 22, 2014 Hey, I am sick of fixing one oil leak from my PI, only to have another one start. I have put a nice crank case breather on it, which has done a lot of good to reduce internal pressure, but it just weeps out everywhere. I am thinking of trying one of those stop leak additives that swell up all the seals and gaskets in an effort to stop all the leaks. Has anyone had any success with this sort of thing, and am I risking things like clogging up oil galleries etc with it. Also, if I put it in my OD gear box is it going to clog that up? I will fix all the leaks properly one day, but for now I just need it to stop wrecking my shed floor!CheersJosh Quote Link to comment Share on other sites More sharing options...
Richard B Posted September 22, 2014 Share Posted September 22, 2014 Are you sure it's not worn bores causing excessive crankcase pressure.PI's are notorious for having this problem, often caused by bore wash from an over rich fuel mix.It's a downward spiral, worn bore, less depression on idle, more fuel on idle from MU, more bore wear, repeat ad infinitumKeep at it, but worth doing a compression test. Quote Link to comment Share on other sites More sharing options...
josh18 Posted September 22, 2014 Author Share Posted September 22, 2014 Yep, my bores are worn I think. I checked the compression a while back and it is low, and the outlet on the crank case breather tank I made is like a little smoke stack! Rings and hone are definitely on the to do but I would have thought the crank case breather would relive the pressure enough. I have an extra breather from the blanking plate for the mechanical fuel pump. Quote Link to comment Share on other sites More sharing options...
nang Posted September 22, 2014 Share Posted September 22, 2014 Sorry but I think these so called stop leak products are snake oil. May be ok on modern cars with rubber gaskets but in my experience useless on cork/ paper ones.Tony. Quote Link to comment Share on other sites More sharing options...
DJB_Harvey Posted September 22, 2014 Share Posted September 22, 2014 Snake oil ?? Quote Link to comment Share on other sites More sharing options...
ferny Posted September 22, 2014 Share Posted September 22, 2014 Don't fight the symptoms, find the cure. Otherwise you'll just be chasing your tail and making the time and money needed to sort it out properly worse. Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted September 23, 2014 Share Posted September 23, 2014 Hone and re-ring to reduce crank-case pressure.Nick Quote Link to comment Share on other sites More sharing options...
josh18 Posted September 23, 2014 Author Share Posted September 23, 2014 Thanks fellas. A hone and re-ring it is thenCheersJosh Quote Link to comment Share on other sites More sharing options...
nang Posted September 23, 2014 Share Posted September 23, 2014 Measure the bores first. If badly worn a hone will be a waste of time and money. May well need a rebore , :'(Tony. Quote Link to comment Share on other sites More sharing options...
CRAJ Posted September 24, 2014 Share Posted September 24, 2014 Have a look back to around June time on my blog. I honed and re-rung my Pi at around 157k miles on standard bores. Worked very well and I couldn't be happier with the results.Colin. Quote Link to comment Share on other sites More sharing options...
josh18 Posted September 24, 2014 Author Share Posted September 24, 2014 Thanks for that, I'll check it out. I wont know what the bores are like till the head is off, but I'll be sure to measure it all properly. There is no piston slap and it doesn't burn any oil so I reckon the bores will be ok. Quote Link to comment Share on other sites More sharing options...
josh18 Posted September 24, 2014 Author Share Posted September 24, 2014 Hey Colin, I just read your blog, thanks for that! I love forums, you can learn so much and you are never alone! My compressions were very similar to how you described yours when I measured them a while ago, and probably worse now, though it doesn't seem to burn any oil. I guess the compression rings can be stuffed while the oil ones not. Did you do a compression check since the new rings?CheersJosh Quote Link to comment Share on other sites More sharing options...
CRAJ Posted September 24, 2014 Share Posted September 24, 2014 I haven't done a compression check since, perhaps I will before the RBRR whilst fettling other stuff. I haven't used enough oil in over 2000miles since the work, for it to show on the dipstick though ;)Colin. Quote Link to comment Share on other sites More sharing options...
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