How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Mike S. Your Own Question

Mike S.
Mike S., Mechanic
Category: Car
Satisfied Customers: 4979
Experience:  25+ years experience as an auto mechanic.
Type Your Car Question Here...
Mike S. is online now
A new question is answered every 9 seconds

Rodeo: litre 2004 V6..blowing..due to excessive plums of blue smoke

Resolved Question:

Hi their. We have a Rodeo 3.5 litre 2004 V6 that is giving us nightmares! At 124,000 this motor just began blowing excessive smoke and un-drivable due to excessive plums of blue smoke. We have a workshop and fully rebuild this motor 200kms ago. Engine was ok and now back to square one! Comps are good, but and cylinders have oil on top of pistons except lefthand rear bank. Pcv and breathers all clear. When engine striped down originally, no real signs of wear/damage was evident. Is their something we are over-looking? Can you help? Have invested lots of time and money without a solution! Don't want to strip down motor again if another solution. If Cat convertor/s had failed and sucked fragments back, i"m sure bore damage would have occured. PLEASE HELP...Thanks Tom.
Submitted: 2 years ago.
Category: Car
Expert:  Mike S. replied 2 years ago.

Ok, blue smoke is burning oil.

So you are saying this engine was rebuilt just 124 miles ago?

Did you replace the oil control piston rings? Those are usually the lowest rings. Did you stagger the ends of the other rings so the empty spaces don't lign up?

If you do have oil on top of a few pistons, then those oil control rings may be worn if they weren't replaced, or the cylinders may be too worn. Did you do any measuring to the cylinder walls?

 

Customer: replied 2 years ago.

Thankyou for your reply.

Engine done no more than 200km since rebulid!

 

Engine block was replaced with second hand unit, proffessionally machined, new pistons, rings, bearings to suit. Cylinder heads reconditioned and new gaskets, t-belts etc fitted.

25 years in the trade have only fitted rings incorrectly as an apprentice!(my but still hurts lol :)

 

We must be over-looking something as fault is exactly the same as before rebuild, hence our reason for overhaul in first place.

 

All 6 cylinders have oil on tops. Only no.6 cylinder has very little.

 

Engine performed as normal with-in 200kms and then just began to smoke as previously.

Expert:  Mike S. replied 2 years ago.
Did you rebuild or replace the oil pump? How much oil pressure do you have?
Customer: replied 2 years ago.

Pump was serviced, clearances checked and refittted.

 

Will carry out oil pressure check and get back to you.

 

Regards Tom.

Expert:  Mike S. replied 2 years ago.
ok
Customer: replied 2 years ago.

Thanks for advise.

 

Oil pressure checked and reads 700kpa pressure @ 3000rpm.

 

 

Expert:  Mike S. replied 2 years ago.
Thats 101 psi. Let me see if I can find the spec on that but I've never heard of any spec that high.
Customer: replied 2 years ago.

At operating temperature, gauge sits around 50psi and doubles that @ 3,000rpm.

Looks like oil pump had the gong!!!!

 

Thankyou so much....we may finally be able to get it right thanks to your help.

 

Regards Tom.

Expert:  Mike S. replied 2 years ago.
I cannot find any specs on that. I have no manuals that cover the Holden. I still believe though 100 psi is too much. If that oil pump has a spring for the relief valve perhaps it is stuck maybe due to gunk or carbon buildup.
Mike S., Mechanic
Category: Car
Satisfied Customers: 4979
Experience: 25+ years experience as an auto mechanic.
Mike S. and 4 other Car Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician