Question about Mitsubishi 3000GT

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Timing belt broke and demage 3 valves 1 Exchause valve 2 Inlet valve

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  • Salesi Luani
    Salesi Luani May 18, 2011

    I thinks you got the wrong website address,,can you send it again ,,please..
    I got problem trying to get to this website..

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  • Contributor
  • 104 Answers

Do you need directions on the whole removal...or why did this happen

Posted on May 18, 2011

Testimonial: "you are so awsome,,,,thats great ..yhanks very much"

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  • Salesi Luani
    Salesi Luani May 18, 2011

    I am asking if you can supply those valves or direct me me to a website site for spareparts to buy yhose valve..
    Regards

  • Shane Millis May 18, 2011

    I personaly would replace all of them you could go to www.MitralValverepair.org

  • Shane Millis May 18, 2011

    another one is www.appletreeauto.com hope this can help ty

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1 Answer

How do I adjust valve clearance on 912/3 deutz engine


firing order is 1-2-3
so when no 2 cylinder valves are in the rock position ( exhaust closing at the same time as inlet is opening) that will be no 1 piston tdc compression stroke adjust the both valves to the specification
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when no3 piston has valve rock adjust no 2 cylinder valves
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go google and type in valve clearance of deutz 3 cylinder engine
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www.deutzamericas.com page 42 of the manual

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Trying to replace broken timing belt. Trying to set #1 cyl. to TDC manually. no compression reading on 1 &4, readings on 2 & 3. What could cause this?? HELP!!


Hole in the piston crown is the worst Charles, but let's not be pessimistic :>(

More likely valves open. At TDC firing stroke both inlet and exhaust valves should be closed. The flat, low part of the cam should be on the followers. So 1 and 4 have valves open, 2 and 3 are closed. If you turn the cam 180 degrees, you should have compression on 1 and 4 and no compression on 2 and 3.

The other thing though, is that when the timing belt breaks, the valves are often in the wrong place at the wrong time and can often meet the piston head on. This can bend the valves. or damage the piston. The normal advice is to remove the cylinder head to check, and then service the valves whilst you have it apart.

A job like this, you need a workshop manual.

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Most likely the valves were bent.
When you attempt to start the motor does it turns over a bit fast and will not sound quit right - Not even attempt to spark up or fire up.
Check engine cylinder compression. The valves were bent when the belt broke.
you will
1. check compression (and when it fails)
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Timing belt may have slipped. Check valve timing. If good, valves may be damaged. If bad, valves may also be damaged. Fix belt first and recheck compression. If compression still bad, remove head for repair.

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Will the valves will connect with the piston if the timing belt broke?


I'm assuming you meant if the timing belt broke would the pistons hit your valves? 2 parts to this, #1 if your belt just broke you should be fine, #2 if your belt skipped time significantly (highly improbable) only then would your internal components have a chance of hitting each other from components trying to open and close at improper times. This could damage both intake/exhaust valves, other valve train components and even damage the head of your pistons.

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1 Answer

Timing belt broke and jump timing how do i get


If you have the harmonic balancer still attached you can align the timing marks with 0 degree to get the main block aligned. With the head removed you can turn the cam shaft till the number 1 valves are both closed and the number 3 exhaust valve is open. Take the time to inspect the valves as well. This vehicle did not come with no contact valves so when the belt broke it is possible the valves made contact with a piston and bent. I highly recommend you get the Haynes Repair manual on this vehicle from the local auto parts store as it has detailed instructions on how to get back to TDC if this happens. It also has Pictures on this. Because this belt goes around 3 timing marks aligning those after you have the pistons at TDC if you align the timing marks on the different sprockets/pullies the timing for teh valves will be correct.

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1 Answer

Timming belt broke at 65mph


7 year old vehicle.

If the timing belt broke it means the pistons have hit and bent the intake/exhaust valves ! You need of consider the cost of repair verses getting another vehicle.
These are the choices.
1) Rebuild the engine. Remove head, replace valves/guides gasket, intake/exhaust manifold, fuel injectors, air breather, etc etc labor $$$ !
2) Replace engine - remove old engine remove intakexhaust manifold, air conditioning, radiator, battery etc, etc labor $$$.
3) Sell the vehicle for what you can get and get another one $$$.

You will have to decide which is the cheapest in terms of money and your time.

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1 Answer

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The easiest way to test this is to carry out a compression test. This test will determine if any valves are bent. The test is very easy to carry out. 1.obtain a compression tester. 2. remove all spark plugs. 3. screw tester into spark plug hole. 4. with your foot on the accelarator, crank engine. 5. read the tester reading and write it down. eg. cyl 1 175psi cyl.2 170psi etc. if you have a bent valve one cylinder will be very low compared to the rest.

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Hello,Bad Luck with timing chain failure,
Sorry to bear bad news but as far as I know Gm engines are NOT safe i.e. the valve miss pistons. It sometimes isn't too severe if very low rev's i.e. tickover, usually 2 or 3 exhuaust and same inlet. Let's hope no seats.
Cheer's!
Paul 'W'
Onyer~EDson(:0)~[><

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