Question about 2001 Mitsubishi Eclipse

2 Answers

Should I upgrade my (105,000 miles motor) or is more economical to buy one already upgraded if possible? I read you wanted upgrade my car the Intake system to look at (heads,cam, valves, lifters, throttle body spacers). Secondly, will having more Horse Power make it hard on the stock automatic transmission. I have a 2001 Mitsubishi Eclipse GT, v6 3.0L Before I get headers and a new Exhaust system I think I better examine my motor considering the number of miles on it.

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  • bradley10
    bradley10 May 15, 2010

    Thank you very much you was lot of help. I have more question for you or anyone else who wants to help.

  • bradley10
    bradley10 May 18, 2010

    Thanks a lot, this was the type of information I needed. I'm going to search for prices. I may upgrade the Cam as well. Thank you again.

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  • Master
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Hi. OK, at this mileage, I would recommend to upgrade after you have done the following to the existing motor:

1 Recondition the head assembly. The entire head Assembly.
2.Inspect the crank shaft for rod bearing damage. Machine the shaft if needed.
3. Inspect the transmission for possible valve body issues and other normal ware at this mileage.
4. Preform a block compression test. this will expose any cylinder issues that may be present, at this time.
5. Flush the engine coolant and oil sections, thoroughly. this will remove build up form the engine. Highly recommended.
6. Totally rebuild the entire throttle body and manually scrub the intake free of carbon build up.
7. Flush the transmission, thoroughly.

All the check points above are needed in order to accommodate a full upgrade at this current mileage interval. Your stock transmission should be able to handle any possible upgrade you may consider, unless you are considering going to a higher output cam and CPU setup. In that case, I would adjust the transmission setup, as needed. It all depends on what horse power you are targeting. It will be more economical to just recondition your existing engine before upgrading if there are no leaks present, at this time. I would recommend to look into the available enhanced cpu chip kits for this vehicle. The chips increase horse power, efficiently. High performance catalytic converters are available along with the exhaust upgrades.

Posted on May 16, 2010

  • 4 more comments 
  • bradley10
    bradley10 May 16, 2010

    The transmission been Flushed and under warranty.

    Now when I get this work done to the engine is this called an overhaul or partial overhaul?

    1. Recondition Heads
    2. Check Crank Shaft
    3....Done Automatic transmission under warranty
    4.Block compression test
    5. Flush the engine coolant
    6. The dealership said they can flush the throttle body..... But you think it would be better to just rebuild the whole throttle body?
    - Scrub Intake
    7. Transmission been flushed already

    Other then steps #3 and #7, how long could this work take? Hours or days? Roughly how much would the labor cost 1 or $2,000.00 dollars?


  • Michael Masters
    Michael Masters May 16, 2010

    Ok, this will be a partial overhaul. A complete ring job and block repair(machined cylinder walls) would complete the recommended list and it would constitute a full overhaul. 1,2 and 6 will be the most expensive. The labor charge would generally be around 400 dollars or so, plus the parts needed for the head(s) and crank shaft machining procedure(if needed). The block compression test is fairly simple and requires a special tool that most mechanics should have at their shop. I do recommend to rebuild the throttle body on this particular engine, if possible. I am not fond of the flushing methods, at all.

    The total repair time could vary. It depends on how skilled the mechanics abilities are and how the shop is outfitted. 1, 2 and 3 should take less than two weeks, give or take a few days. the engine will need to be pulled for those repairs and inspections. This will be a big job, and will run into the 1800 dollar price range, but shouldn't exceed 2000 dollars.

    If you are ok with the current state of your throttle body, go ahead with the flush, but if you have had idling issues, or signs of throttle body ware, it will be a good idea to have it rebuilt during this partial overhaul.

  • Michael Masters
    Michael Masters May 16, 2010

    The actual final price will be lower if the crank shaft proves to be ok, and not compromised. Purchasing a crate or re-manufactured engine and upgrading it will be more expensive than what i have recommended.

  • Michael Masters
    Michael Masters May 16, 2010

    A cold air induction kit would be a nice addition as well to this fine motor vehicle.

  • bradley10
    bradley10 May 16, 2010

    Wow very detailed, information. I know my engine has a lot of miles, no serious problems or leaks yet. But I want to keep the car maybe show it off in some car shows. I want to tackle any possible major problems up front.



    I like to hunt for parts & kit packages to compare prices. I also may look for a few engine dress parts also.

    I wonder how much horse power can I achieve without being worried about the transmission.

  • Michael Masters
    Michael Masters May 16, 2010

    300 Hps would be the limit in your case. I wouldn't push it pass this mark without some sort of modifications to the transmission. If you exceed this mark, you should invest in a high performance shift kit modification pack.

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  • Master
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Any motor or transmission can fail at any time. If you choose to do the internal upgrades yourself and this is your first time I would just do it to this engine. This way you will gain the experience for the next one if you choose to do it again.. Also if you mess up and destry this engine you may have a reason why so next time you wont make the same mistake.

Any time you add more power to a transmission you will stress it more. The number one part that fails in stock cars is transmissions so as far as what your trying to accomplish is going to be based on the size of your pocket and whether or not you can afford mistakes.
Personally other than a cold air intake system and an exhaust I would not do anything else on a mitsubishi. They arnt made to be a strong race car.

Posted on May 15, 2010

  • bradley10
    bradley10 May 15, 2010

    I really enjoy the looks of my car and I want to keep it. I was just looking for possible upgrades and problems that could occur later on.

    I was looking at Exhaust and Headers combo alone, with my already cold-air intake. Do you think these 3 together would be risky or possible damage my car?

    Roughly how much would it cost to get Heads, Cam, Valves, lifters upgraded? I'm pretty good at finding good prices, once I know what to get.


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