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 Tech501 Your Own Question
Tech501
Tech501, Auto Service Technician
Category: Car
Satisfied Customers: 747
Experience:  38 years exp, ASE Mastertech with L1 Advanced Engine performance
74686
Type Your Car Question Here...
Tech501 is online now
A new question is answered every 9 seconds

98 Toyota Corolla: 000 miles..4 cylinder..fuel injectors..engine oil

Customer Question

I have 98 Toyota Corolla with about 100,000 miles. It's 4 cylinder with fuel injectors. Since engine oil was leaking from valve cover, I changed valve cover gasket and the leaking stopped. The problem I havev is this.

I started getting vibration right after the gasket was changed. I recently flused throttle body and replaced PCV valve. I had no vibration at all before valve cover gasket change.

When I changed the gasket, I cleanup the inside of cover with towel and used sealant with new gasket. What could go wrong????

any idea??

Submitted: 11 years ago.
Category: Car
Expert:  Tech501 replied 11 years ago.

 Recheck your firing order on the spark plug wires. Make sure the are connected to the right coils. #1 is on the passenger side. Make sure you didn't pull one of the plug wires apart when you were pulling on them either.




1998 Toyota Corolla CE Sedan
1.8 liter DOHC L4 (1ZZ-FE)


Customer: replied 11 years ago.
Reply to Tech501's Post: Corolla wire set has numbers printed on the wire. I didn't do anything for wireset. I just unplug and plug back in. The firing order didn't concern me. Some people tells me something decided to come out since it's old car, and I can't think of any reason.
Expert:  Tech501 replied 11 years ago.
 Did you drop any of the spark plugs?
Customer: replied 11 years ago.
Reply to Tech501's Post: I didn't have to pull spark plug to change valve cover gasket. This is not the first time I worked on engine. I don't think I ever had to pull spark plug to change gasket. I've had japanese cars only.
Expert:  Tech501 replied 11 years ago.
 Well, since you never identified the engine, nobody knows which one you have. Any double overhead engine places the spark plugs in the center of the valve cover which means the wires would have to come off to get the cover off. If the cover was leaking at the tube seals, which most do, it would have covered the plugs with oil so common sense would suggest that you would remove the plugs to clean all the oil out now that you have stopped all the leaks. You don't know what you did wrong so we try to cover all the bases.
Customer: replied 11 years ago.
Reply to Tech501's Post: well, I thought 98 corolla has one type of engine, 4 cylinder with fuel injectors. Oil was leaking back side of the engine. Of course, I had to take the wires off, but I didn't have to pull spark plugs off . That's why I don't think spark plugs have nothing to do with this. Could it be pcv valve hose or air intake? PCV valve is quite new though.
Expert:  Tech501 replied 11 years ago.

 

Quote:
Could it be pcv valve hose or air intake?


Sure it could if you forgot to hook it up.


You need to just go back over your work and look for anything that may be bent, broken, unplugged or leaking. If the problem started after you made the repair, then common sense says it was because of something you did. Make sure none of the plug wires broke internally from pulling on them. If those wires were original with 100K on them, they may be breaking the carbon cores internally. If they're original, which they are if they are numbered, they should be replaced anyway.


Tech501, Auto Service Technician
Category: Car
Satisfied Customers: 747
Experience: 38 years exp, ASE Mastertech with L1 Advanced Engine performance
Tech501 and 10 other Car Specialists are ready to help you
Customer: replied 11 years ago.
Reply to Tech501's Post: This was not much helping..Thanks anyway
Expert:  DCM replied 11 years ago.
How certain are you that all the vacum hose are plug-in correctly? If you are hundred percent sure everything you pulled out is back to where they should be, Start the engine then go under hood and listen carefuly and try to separate all the noise you hear, if you hear a little loud Tik noise sounds like an electronic lighter only louder, then check your sparkplug wire maybe there is some spark leak there, if not I saggest you to check your compression.

Let me know
Customer: replied 11 years ago.
I will do that and let you know.
Thanks for the reply.

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
< Previous | 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)

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    1006
    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:

    1006
    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:

    1694
    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:

    1447
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/BL/Bluegorilla/2012-6-21_16298_cam.64x64.JPG GM Tech (Cam)'s Avatar

    GM Tech (Cam)

    Auto Service Tech

    Satisfied Customers:

    669
    GM Grand Master Technician 2007. 14 years experience.
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    Former ASE Master Tech

    Satisfied Customers:

    2406
    ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    2123
    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:

    992
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes