Help new crank seals but still have white smoke

Discussion in 'Oregon' started by tcdave, Jul 7, 2011.

  1. tcdave

    tcdave New Member

    Joined:
    Jun 21, 2011
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oregon
    I bought a 1993 blaster from a guy who rebuil the top and bored it to 240cc. It was smoking a lot of white smoke so i replaced the crank seal on the right side by the clutch. I started it up and its still smoking. Can it be the old oil in the exhaust heating up or is my engine done?:(
     
  2. 04YamahaRider

    04YamahaRider Member

    Joined:
    Jun 11, 2011
    Messages:
    355
    Likes Received:
    11
    Trophy Points:
    75
    Gender:
    Male
    Occupation:
    Backyard Mechanic
    Location:
    Cullman, Alabama
    tranny oil smells really bad i've heard, so if it smells..still have a leak possibly somewhere..hope this helps
     
  3. brandoz28

    brandoz28 Member

    Joined:
    Sep 24, 2009
    Messages:
    10,767
    Likes Received:
    96
    Trophy Points:
    53
    Location:
    Iowa
    could be residual oil, you really need to do a leakdown test on it to make sure the crankcase is sealed up
     
  4. tcdave

    tcdave New Member

    Joined:
    Jun 21, 2011
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oregon
    It doesn't smell bad its kind of sweat. I put in 10-30 casterol motor oil in it. How do I do a leak down test?
     
  5. brandoz28

    brandoz28 Member

    Joined:
    Sep 24, 2009
    Messages:
    10,767
    Likes Received:
    96
    Trophy Points:
    53
    Location:
    Iowa
  6. tcdave

    tcdave New Member

    Joined:
    Jun 21, 2011
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oregon
    Ok if i do that and find a leak how does that help me? I though the only place oil from the gearbox can reach the piston is through the crankshaft seals right? should i use thicker oil?
     
  7. 04YamahaRider

    04YamahaRider Member

    Joined:
    Jun 11, 2011
    Messages:
    355
    Likes Received:
    11
    Trophy Points:
    75
    Gender:
    Male
    Occupation:
    Backyard Mechanic
    Location:
    Cullman, Alabama
    take that oil out and put Gear Oil in it, wrong oil!! put 80w-90 Gear oil in it i think that is whats recommended.
     
  8. tcdave

    tcdave New Member

    Joined:
    Jun 21, 2011
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oregon
    Do you think my oil is to thin? I will go buy some gear oil then. Any other ideas? Should i put transmission stop leak in it?
     
  9. brandoz28

    brandoz28 Member

    Joined:
    Sep 24, 2009
    Messages:
    10,767
    Likes Received:
    96
    Trophy Points:
    53
    Location:
    Iowa


    THIS IS INCORRECT!!!!!!!!!!!!!!!!!!!


    yamaha does NOT recommend gear oil in these transmissions, doing so will not do any favors for your clutch either, that motor oil probably has friction modifiers which will also wreak havoc with the clutch.


    you need motorcycle gearbox oil, the recommended is 10w-30 or 10w-40. Others have used ATF type F with success.

    belray also makes a great gearbox oil. its all preference, but use a good motorcycle oil.




    Back to original issue:

    gear oil can get to the crankcase through the small spacer around the crank (that the seal goes around) or between the cases themselves.
     
  10. speedemon17

    speedemon17 Member

    Joined:
    Jun 14, 2010
    Messages:
    3,606
    Likes Received:
    31
    Trophy Points:
    90
    Gender:
    Male
    Location:
    Ohio
    does anybody notice that he posted it in the wrong section and listen to brandonz28 trust me he knows what hes talking about
     
  11. 04YamahaRider

    04YamahaRider Member

    Joined:
    Jun 11, 2011
    Messages:
    355
    Likes Received:
    11
    Trophy Points:
    75
    Gender:
    Male
    Occupation:
    Backyard Mechanic
    Location:
    Cullman, Alabama
    i run Valvoline Durablend tough driving formula synthetic blend 80w-90 GEAR OIL, and it hasnt done any harm to my factory '95 engine, yep never been rebuilt and nothing in the engine has had a problem. (prev. owner my good friend) so i dont think thats totally incorrect;) Gear oil works good.(for me anyway)
     
  12. tcdave

    tcdave New Member

    Joined:
    Jun 21, 2011
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oregon
    I put in the 10 30 gear oil and its still smoking
     
  13. brandoz28

    brandoz28 Member

    Joined:
    Sep 24, 2009
    Messages:
    10,767
    Likes Received:
    96
    Trophy Points:
    53
    Location:
    Iowa
    doing a leakdown test is going to be the ONLY way to know if its residual or if you've still got a leak
     
  14. tcdave

    tcdave New Member

    Joined:
    Jun 21, 2011
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oregon
    ok so i called the yamaha dealership and they told me that my casterol 10-30 oil will work. They also said I should just run the quad for about an hour to get rid of all the old oil that went in my lower end. I will give it a try and let you guys no what I find.
     
  15. N8tsNastyBlasty

    N8tsNastyBlasty Member

    Joined:
    Jan 6, 2011
    Messages:
    347
    Likes Received:
    12
    Trophy Points:
    60
    Occupation:
    telecommunications tech.
    Location:
    wichita ,ks aka tha 316 or ICT
    id pull the tank flip it upside down and pull the plugput it gear with the ignition off and rotate the back wheels to pump all of the oil out maybe even spray some carb cleaner in if its real bad.Sounds crude but i often find simple ingenious methods to be effective if thouht out well. just my logic. some ppl think in barbaric . . . well i am
     
  16. tcdave

    tcdave New Member

    Joined:
    Jun 21, 2011
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oregon
    Ok im gonna try some of the thicker gear oil then. Would fliping it upside down and turning the back wheels actually help. I will do a leak down test soon. I bought cheap crank seals off ebay maybe thats the problem. The guy I bought it from had a nice performance exhaust, but he gave me the stock one and its bored to 240cc. I cleaned a lot of gunky oil out of the exhaust today, but its still smoking. Could he have rebuilt the top end bad?
     
  17. Luni

    Luni Member

    Joined:
    Sep 9, 2009
    Messages:
    1,310
    Likes Received:
    24
    Trophy Points:
    43
    Location:
    Layton, UT
    Its going to take time of running that thing before all the gear oil is gone. 30 minutes or so of operating.

    I read an article where they were testing different ratios of oil/gas mix, and they had a sniffer in the exhaust, and between tests they found it was taking 30 minutes or so for the ratio to actually get to where they wanted it because of how much oil was in the crankcase.
     
  18. N8tsNastyBlasty

    N8tsNastyBlasty Member

    Joined:
    Jan 6, 2011
    Messages:
    347
    Likes Received:
    12
    Trophy Points:
    60
    Occupation:
    telecommunications tech.
    Location:
    wichita ,ks aka tha 316 or ICT
    anytime an engine gets flooded with any excessive fluid ie gas ,water , or even oil thats how i flush it.
     
  19. tcdave

    tcdave New Member

    Joined:
    Jun 21, 2011
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oregon
    So only 30 mins for all my gear oil to burn out? I'm screwed .
     
  20. Luni

    Luni Member

    Joined:
    Sep 9, 2009
    Messages:
    1,310
    Likes Received:
    24
    Trophy Points:
    43
    Location:
    Layton, UT
    How are you screwed?
     

Share This Page