Register now to get rid of these ads!

235 runs "pretty good" but smokes like a chain smoker on crack!!

Discussion in 'The Hokey Ass Message Board' started by chopperimpala, Aug 26, 2007.

  1. Ken Carvalho
    Joined: Dec 22, 2004
    Posts: 1,561

    Ken Carvalho
    Member

    I got my 235 "dialed in" timing set, carb adjusted, valves adjusted, but she SMOKES like crazy!!! I did a compression test and got these results:


    front to back...

    cyl #1: 130 lbs., #2: 120 lbs., #3: 120 lbs., #4: 117lbs., #5: 120 lbs., #6: 140 lbs.!!!

    Is this basically saying the rings and valves are good BUT THE valve seals are bad??? I hope so, as I have a done/machined head ready to put on, BUT if you see something else there let me know!!! There IS oil coming out of the tail pipe, so I realize SOMETHING is going on, enlighten me PLEASE....Ken
     
  2. BZNSRAT
    Joined: May 30, 2007
    Posts: 710

    BZNSRAT
    Member

    I need to know too...mine smokes also. I am leanin towards a SBC, but would like to stay with the 235 if it can pull its weight.
     
  3. draggin ass
    Joined: Jun 17, 2005
    Posts: 1,920

    draggin ass
    BANNED
    from hell

  4. CURIOUS RASH
    Joined: Jun 2, 2002
    Posts: 9,635

    CURIOUS RASH
    Classified's Moderator

    Does it smoke all the time or just when you start it? If it smokes all the time is it worse when you start it or pretty constant?

    Also, what kinda smoke is it? Oil?(blue) Gas?(Black) Water?(white)

    If it's a new build, maybe all the rings haven't seated yet..
     

  5. Redneck Smooth
    Joined: Apr 19, 2004
    Posts: 1,344

    Redneck Smooth
    Member
    from Cincinnati

    You gotta drip oil in the cylinders and retest. If the numbers go up, it's rings/cylinders, if not it's at the top end. The oil will temporarily seal the rings and give you better numbers. They do appear to be within 20% of each other, which is a good sign, but you absolutely have to retest after running a tbsp or so of oil into each cylinder through the spark plug holes to know for sure. Also, make sure you test it both ways next time and do it with the motor warmed up....
     
  6. Rootie Kazoootie
    Joined: Nov 27, 2006
    Posts: 8,134

    Rootie Kazoootie
    Member
    from Colorado

    Need to do a leak down, could be broken oil ring(s) guides/seals, crackage etc. it's just speculation otherwise.
     
  7. Ken Carvalho
    Joined: Dec 22, 2004
    Posts: 1,561

    Ken Carvalho
    Member

    Don't have to add oil as when I did the test oil was "flowing" out of the cylinders already!! Smoke is both "blue AND black" yes I know blue: oil, & black: rich!! NOT a new re-build, a car pulled out of a field after sitting 15 years!! rebuilt the carb, idle adjustmeants may be the black smoke! Smokes ALL the time, warm, cold, at idle, driving!! If I leave it at idle for about 3 minutes, the smoke "subsides" a little bit, BUT the moment I step on the gas to take off in gear, she "billows"!!!! out like a chimney! The compression test was AT TEMPERATURE, and like I said, no oil is needed as it is already at the spark plug threads!! I am just trying to figure out if it is valve seals, or rings. Temp. guage shows good at 195, and oil pressure guage reads 25 at idle and moves up and down when I step on the pedal.....Ken
     
  8. gas pumper
    Joined: Aug 13, 2007
    Posts: 2,953

    gas pumper
    Member

    doubtful that it's valve seals cause all there is is little flat o rings under the keepers. these don't have the umbrellas. TOO much oil up there in the valve cover?
    Maybe the drain backs are plugged up, or too much getting pumped up there. And your flooding the valve stems. or really bad wore out valve guides. Too much oil on the rocker shaft can be solved by crimping off that little oil tube near the center of the shaft, till you get just an ozze of oil to keep it happy.

    Frank.
     
  9. spudz
    Joined: Mar 3, 2001
    Posts: 524

    spudz
    Member

    there is NO way that the oil is at the threads.........
     
  10. gas pumper
    Joined: Aug 13, 2007
    Posts: 2,953

    gas pumper
    Member

    A flame thrower kit will burn off the oil and smoke,
    I fixed my old forklift that way:D
     
  11. Redneck Smooth
    Joined: Apr 19, 2004
    Posts: 1,344

    Redneck Smooth
    Member
    from Cincinnati

    All the cylinders or just a couple? This thing is starting to sound like a mess...
     
  12. noboD
    Joined: Jan 29, 2004
    Posts: 7,294

    noboD
    Member

    Check inside the valve cover for a blocked return hole. And didn't the 235 still have a draught tube? Could be kinked or blocked.
     
  13. Thumper
    Joined: Mar 7, 2005
    Posts: 1,611

    Thumper
    Member

    I had a 235 that did that and I pulled the head and found a burned piston. It was burned down one side.
     
  14. Ken Carvalho
    Joined: Dec 22, 2004
    Posts: 1,561

    Ken Carvalho
    Member

    HMM... lets see, I am looking at the motor, I see oil leaking down where the threads are where I just removed the 6 spark plugs, and .......
    uh yes there is oil slowly dripping down the side of the head where the plug screws into the head !!! SO YES there IS a way oil is at the threads!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
     
  15. spudz
    Joined: Mar 3, 2001
    Posts: 524

    spudz
    Member

    it wouldn't run if a cyl was full of oil....liquid don't compress. the oil u see is prolly pooled ontop of the plug from the valve cover. like I said....there is no damn way. I wasn't being a asshole but thats the way it is...
     
  16. 1oldtimer
    Joined: Aug 21, 2003
    Posts: 7,593

    1oldtimer
    ALLIANCE MEMBER

    sounds like maybe the oil rings are stuck or broken, but the compression rings are good.
     
  17. F&J
    Joined: Apr 5, 2007
    Posts: 13,217

    F&J
    Member

    a year ago I put one in a guys pickup and the donor motor sat for 15 years. It smoked like yours. I tried fast idle for an hour or two and it was slightly better. Then I just put it on the road a few days and it cleared up.

    But if you have black smoke too, you need to figure that out too, maybe carb or ignition.
     
  18. HEATHEN
    Joined: Nov 22, 2005
    Posts: 7,591

    HEATHEN
    Member
    from SIDNEY, NY

    If the engine sat idle for many years, try a can of G.M. Top Engine Cleaner. Follow the directions on the can. If it's got stuck rings, this will usually free them up. If not, you're out six bucks.
     
  19. rayjon
    Joined: Aug 15, 2006
    Posts: 127

    rayjon
    Member
    from Reno Nv..

    sounds like the oil rings are stuck, what I have done in the past is an atf and diesel mix, pull the plugs fill all the cylinders and let it sit for a day or so... then turn it over to clear the cylinders put the plugs back in refire and try again.. good luck it is a 50/50 trick sometimes it works sometimes not...


    remember a 235 is going to have cast iron compression rings so with the ballance you have looks like the compression rings are working, but the oil rings below them are stuck... if you can't free them at the least you will be doing a rering on the motor.... which if it were mine and i couldn't free it up, I would do anyway. Gaskets and rings are cheep....compared to feeding it oil....
     
  20. Road Runner
    Joined: Feb 7, 2007
    Posts: 1,257

    Road Runner
    Member

    I'm sure you drained the old oil and replaced it already.
    My 216 did the same thing when I got it with the coupe and started it first.
    The crankcase had TOO MUCH OIL! About 2 quarts or more overfilled...

    Seafoam is another top engine cleaner.

    Sounds like it's time to pull the head anyway, since you got a new one ready to go...
     
  21. blown49
    Joined: Jul 25, 2004
    Posts: 2,212

    blown49
    Member Emeritus

    I may be way off base here but didn't the early 235 have a double diaphragm fuel pump that smoked like hell if a diaphragm split? New a guy in the early 60's that re-ringed his '53 Vette motor only to find a ruptured fuel pump.
     
  22. HEATHEN
    Joined: Nov 22, 2005
    Posts: 7,591

    HEATHEN
    Member
    from SIDNEY, NY

    Yeah, that is a possibility worth considering. Sounds like the plot in one of those old "Gus Wilson and the Model Garage" stories!
     

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2020 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.