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Thread: blow by

  1. #1
    Veteran johl's Avatar
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    Default blow by

    so i was looking at a new 86 with a 16 valve in it yesterday and it was all sweet except the bloke said that it was going through a bit of oil. he had a hose coming from the back of the cam cover with a one way pressure valve on the end that would vent once it reached a certain pressure.
    i'v done a bit of research on the whole pcv thing and its still a bit cloudy. he said he would take it to a mechanic to have it looked at but i was just wondering if anyone thinks there may be an underlaying issue here. as far as im aware i could just fit in a catch can to take up the bad oil? or would it be a problem with the valve stem seals? btw he just spent $1200 on rebuilding the head.
    an help would be great before i go further on this car
    stroked 2L ca18-ae86 in the build...eta xmas 2012?

  2. #2
    Veteran blair's Avatar
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    Could have poo'd rings. Compression test it.

  3. #3
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    Almost definitely the rings then (if his head has been done)

  4. #4
    Veteran johl's Avatar
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    Makes sense. I did see a bit of smoke coming out of the exhaust.
    stroked 2L ca18-ae86 in the build...eta xmas 2012?

  5. #5
    Veteran shift_rook's Avatar
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    yeah man, most likely ring, if that's the case do a comp test and appropriate lowballing that follows

  6. #6
    Veteran johl's Avatar
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    will do. thanks guys.

    anyone replaced rings in their 4a recently? approx price?
    stroked 2L ca18-ae86 in the build...eta xmas 2012?

  7. #7
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    i do rebuilds all the time.could be looking any thing from $1000 and up.sometimes depending on your cash flow can be much cheaper to replace the engine.i have plenty of engines to choose from. drop me a line 0414 531 273.

  8. #8
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    Couple of hundred, give or take.

    There's a guy in brissy called 'Mick Cashell Engines' or something along those lines, and he specialises in supplying rings for anything. But basically any good engine shop can get you something.

  9. #9
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    One set of hastings rings I bought were $85. Endurotec pistons + hastings rings were 195. Then add to that the cost of a gasket set, maybe bearings if you feel like it/see the need for them. and while it's apart lets put forgies in it for turbo, maybe get rods, get the bearings coated if they already aren't, get a oil drain put in the sump and by now it's sorta cheaper to throw in a replacement engine. but you don't know how long it will last.

    A general rebuild (bore + new pistons, bearings, gasket set, tank the block, face the deck) ended up costing me about a grand but you know it'll last forever now. It's all clean and not fucked up, like some import engines.

  10. #10
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    was that car in fingal?
    Last edited by Taylor13; 26th July 2010 at 07:30 PM.

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