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 david Your Own Question
david, Auto Service Technician
Category: Car
Satisfied Customers: 1500
Experience:  Certified Master Technician,Certified in diesel & gasoline engines
Type Your Car Question Here...
david is online now
A new question is answered every 9 seconds

How do you replace a head gasket in a 93 Geo Metro

Customer Question

No Comment Added
Submitted: 8 years ago.
Category: Car
Expert:  david replied 8 years ago.

thank you for your question hope this helps.

  1. On fuel injected vehicles, relieve the fuel system pressure.

  2. Drain the cooling system.

  3. Label and disconnect all electrical connectors over and connected to the valve cover and cylinder head.

  4. Label and disconnect all necessary vacuum, fuel and water hoses.

  5. Remove the intake manifold with the carburetor or throttle body installed.

  6. Remove the exhaust manifold.

  7. Remove the timing belt and belt tensioner.

  8. Remove the distributor cap, then mark the position of the rotor and the distributor housing with the cylinder head. Remove the distributor and the case from the cylinder head.

  9. Remove the cylinder head cover.

  10. Loosen and remove the cylinder head bolts in the reverse order of the tightening sequence.

  11. Remove the cylinder head from the engine. Discard the cylinder head gasket.



Do not use any sharp edged tool to scrape carbon from the head. Be careful not to scuff or nick the metal surfaces when decarboning. This could lead to leakage and reduced power output.

  1. Disassemble the cylinder head, clean with solvent and air dry thoroughly. Remove all carbon from the combustion chambers.

  2. Check the cylinder head for cracks in intake and exhaust ports, combustion chambers and head surface.



See Figures 4 and 5

All cylinder head resurfacing operations should be performed by a qualified machine shop; only the cylinder head inspection is recommended to be performed by the home mechanic.

  1. Check the flatness of the cylinder head gasket surface. Using a straight edge and feeler gage, check surface at a total of six locations.

  2. If distortion exceeds the 0.0002 in. (0.05mm) limit at any location, resurfacing of the head is necessary.

  3. If distortion cannot be brought within limits, replace the cylinder head.

Leakage of combustion gases from this gasket joint is often due to a warped gasket surface. Leakage results in reduced power output.

  1. Check for distortion of the manifold seating faces. Using a straight edge and feeler gage, check the seating faces of the intake and exhaust manifolds-to-cylinder head to determine whether these faces can be corrected or if the cylinder head must be replaced.

  2. If measurement after any correction exceeds 0.004 in. (0.10mm), replace the cylinder head.

Fig. 4 Locations for measuring cylinder head gasket surface distortion

Fig. 5: Measuring the cylinder head surface with a straightedge and feeler gage.


To install:

  1. Install the cylinder head gasket with the TOP indicator facing upward and to the crankshaft pulley side.

  2. Install the cylinder head and eight cylinder head bolts. Lubricate the head bolts with engine oil prior to installation.

  3. Tighten cylinder head bolts in the proper sequence to 54 ft. lbs.. (73 Nm). Repeat tighten sequence several times before reaching specified torque figure.

  4. Install rubber seals between the water pump and the cylinder head.

  5. Install the cylinder head cover and secure with nuts and new seal washers. Tighten nuts to 44 inch lbs.. (5 Nm).

  6. Install timing belt and tensioner.

  7. Install the distributor, aligning the matchmarks made during removal.

  8. Install the intake manifold.

  9. Install the exhaust manifold.

  10. Connect all previously removed electrical connectors.

  11. Connect all previously removed vacuum, fuel and water hoses.

  12. Adjust the accessory drive belt tension.

  13. Adjust the accelerator cable play.

  14. Refill the cooling system.

  15. Connect the negative battery cable.

  16. Start the engine and allow it to reach operating temperature.

  17. Check for leaks.

  18. Make any necessary adjustments.

Cylinder head gasket installation

Cylinder head tightening sequence

hope this helps
Bonuses are appreciated

Customer: replied 8 years ago.
how do you relieve the fuel system pressure?
Customer: replied 8 years ago.
how do you relieve the fuel system pressure?
Expert:  david replied 8 years ago.


to remove fuel system pressure

  1. Remove the gas tank cap.

  2. Remove the fuel pump control relay.

  3. Start the engine and run at idle. Allow it to run until the engine stalls due to lack of fuel.

  4. Engage the starter for a few seconds to assure relief of remaining fuel pressure.

hope this helps

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... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...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, 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)


    Satisfied Customers:

    16 years of experience
< Last | Next >
  • Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)


    Satisfied Customers:

    16 years of experience
  • Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • GM Tech (Cam)'s Avatar

    GM Tech (Cam)

    Auto Service Tech

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years experience.
  • Amedee's Avatar


    Former ASE Master Tech

    Satisfied Customers:

    ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
  • Jerry's Avatar


    Master Mechanic

    Satisfied Customers:

    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • Richard's Avatar


    ASE Certified Technician

    Satisfied Customers:

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