Section : General

Nuts driving it's me 

Posted By : David Freeman, 27-Sep-2004, 07:34pm

• Nuts driving it's me 

  Posted By : William Davies, 27-Sep-2004, 08:13pm

  What is your crankcase breather arrangement?
  Cheers,
  Bill.
  

  • Nuts driving it's me 

    Posted By : David Freeman, 28-Sep-2004, 12:00pm

    Bill:
    I can see fumes/smoke coming out of the side of the petrol pump when hot. Also, the dipstick allows out splashes of oil.
    I'm a bit dim sometimes..but is there a crankcase breather on a Mk4 Spit engine and where is it? Is it that large nut/tap with what looks like a screw stuck in it on the side of the block?
    At present the fumes from the rocker area go through a pipe attached to the rear of the pancake air filter on the single 150 carb, but the engine prefers this NOT to be attached as it splutters when idling as, I guess, the motor is deprived of life giving oxygen...
    If I clean up and attach the pair of SUs which came with the engine, I will need to source a pair of filters or an all in one filter unit so that I can do the same as above.
    I remain niggled with the thought that the original cast manifold from the earlier engine, (with the smaller valved head and different cam etc) is stangling this engine, and that once I attach a big bore type exhaust (Extractor + Mk1 Vitesse stainless system) that life will be sweet.
    What do you reckon?
    DF
    
    

    • Nuts driving it's me 

      Posted By : Lloyd Davis, 28-Sep-2004, 03:39pm

      David if its filters for HS2 you want let me know? Meanwhile over to you Bill

      • Nuts driving it's me 

        Posted By : David Freeman, 28-Sep-2004, 04:48pm

        Lloyd:
        May I take it that you might have the answer to my need for filters/filter for my HS2s??
        David

        • Nuts driving it's me 

          Posted By : Lloyd Davis, 28-Sep-2004, 05:03pm

          I have new chrome pancake filters or the original twin box arrangement etc.

          • Nuts driving it's me 

            Posted By : David Freeman, 29-Sep-2004, 04:54pm

            what a fine person you are...
            

    • Nuts driving it's me 

      Posted By : William Davies, 28-Sep-2004, 04:10pm

      The pipe out the side of the rocker cover should feed all fumes from the non-combustion side of the engine back into the carburettor - the large nut at the back-right side of the block is the coolant drain point. What's coming out of the rocker cover pipe when it's disconnected from the filter housing? I would expect to see some fumes at least, copious quantities in fact by the time you see leakage elsewhere. Check that there is no obstruction in this pipe causing pressure buildup. If this is clear then you would seem to have more serious issues. Possibly badly worn valve guides, but I am more inclined towards problems with the rings, the compression test will have verified the compression rings but the others could be stuck firmly in their grooves.
      It is possible to have a leakdown test performed on the engine, but it's not an area I've explored,
      Cheers,
      Bill.
      

      • Nuts driving it's me 

        Posted By : David Freeman, 28-Sep-2004, 04:43pm

        Thanks Bill.
        
        I did pour about 50ml of redex down warm bores and left it there for an hour or so. On restarting there were copious fumes and smoke from the exhaust as well as the rocker cover and petrol pump etc. This 'extra' smoke reduced eventually to the fast stream of smoke I get now (as I did BEFORE the redex treatment). It could be very worn guides as you say. I might put my original small valve head on to this engine for peace of mind.
        At least I really will know if it is the rings then.
        A real bore though.
        David F