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95 Evo3 Bent Valves?

Old Mar 31, 2013 | 07:05 PM
  #16  
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Old head gasket,yes. The timing belt was bought after the other one popped but was placed on the cam gears before it was determine that the valves were bent, so it was reused.
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Old Mar 31, 2013 | 09:38 PM
  #17  
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Originally Posted by 4G63Rules
So this guy used your old timing belt and head gasket? Am I reading that right?
Yeah kinda scary isn't it
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Old Apr 1, 2013 | 11:54 AM
  #18  
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Didn't have time to pull the head off today, but I took the plugs out. Its evident that coolant has been in the cylinders because there is oil and also residue(rust?) covering the spark plugs. Damn am pissed. So what further steps from here should I take guys after I pull the head off?


Edit:I was talking to a guy that has a 500hp evo 3 he said that my motor is blown. Well he sells parts, you think hes trying to swing me into buying parts from him or my motor can actually be blown?

Last edited by david23; Apr 1, 2013 at 12:03 PM.
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Old Apr 1, 2013 | 12:15 PM
  #19  
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You need to remove the head and see what type of damage you have. guessing on the internet will not work.
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Old Apr 3, 2013 | 09:51 AM
  #20  
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Ok guys,
Got the head off. Apparently there's no damage to the block and apparently the "douche bag" mechanic didn't even take the head to the shop on top of not using a new head gasket. Also two valves were bent on the intake side? I cleaned the cylinders and the engine is rotating by hand now I will take it to the machine shop and let them put in two intake valves from another head or something. Anything else I should replace/ do or check whiles the head is off? Any input is greatly appreciated.
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Old Apr 3, 2013 | 10:53 AM
  #21  
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Originally Posted by david23
Ok guys,
Got the head off. Apparently there's no damage to the block and apparently the "douche bag" mechanic didn't even take the head to the shop on top of not using a new head gasket. Also two valves were bent on the intake side? I cleaned the cylinders and the engine is rotating by hand now I will take it to the machine shop and let them put in two intake valves from another head or something. Anything else I should replace/ do or check whiles the head is off? Any input is greatly appreciated.
I don't know how much you're willing to put into this thing but with the amount of stress that has been put on that head I would definitely have them check the mounting surfaces for squareness. If you have the time and money it would be worth it to have it checked for cracks as well.

There was no damage on the piston surface in the cylinder with the bent valves? Do the cams turn with the head off? Sounds like this guy was up to some serious tomfoolery.
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Old Apr 3, 2013 | 11:20 AM
  #22  
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Originally Posted by david23
Ok guys,
Got the head off. Apparently there's no damage to the block and apparently the "douche bag" mechanic didn't even take the head to the shop on top of not using a new head gasket. Also two valves were bent on the intake side? I cleaned the cylinders and the engine is rotating by hand now I will take it to the machine shop and let them put in two intake valves from another head or something. Anything else I should replace/ do or check whiles the head is off? Any input is greatly appreciated.
Where there is 2 bent valves there are prob 4. Not always the case but take the head to the machine shop, have them look at all the valves in that cylinder. I had a situation on an evo were we knew 2 were bent but ended up having the whole cylinder go bad. Or if you wanna be safe tell them to take all the valves out and check them all and then get him some new seals. That way you know there is no problems. Rather go through it completely and know there is only 2 bent rather then just pass it by the eye test thinking you know. Rather be safe then sorry.
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Old Apr 3, 2013 | 11:22 AM
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Originally Posted by satan's rx7
I don't know how much you're willing to put into this thing but with the amount of stress that has been put on that head I would definitely have them check the mounting surfaces for squareness. If you have the time and money it would be worth it to have it checked for cracks as well.

There was no damage on the piston surface in the cylinder with the bent valves? Do the cams turn with the head off? Sounds like this guy was up to some serious tomfoolery.
Yeah I had a situation where we had 4 bent valves on the evo I talked above and the pistons looked brand new still. It does happen that just means they hit at idle or whatever not at any specific rpm and just touched them instead of exploding one.
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Old Apr 3, 2013 | 12:01 PM
  #24  
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Originally Posted by cursedsm
Where there is 2 bent valves there are prob 4. Not always the case but take the head to the machine shop, have them look at all the valves in that cylinder. I had a situation on an evo were we knew 2 were bent but ended up having the whole cylinder go bad. Or if you wanna be safe tell them to take all the valves out and check them all and then get him some new seals. That way you know there is no problems. Rather go through it completely and know there is only 2 bent rather then just pass it by the eye test thinking you know. Rather be safe then sorry.
This is also good advice. The head's already out and it shouldn't take them THAT much longer to inspect the rest.

I also forgot that it would be a good idea to get new head bolts as yours should be torque to yield. These are all annoying things but will give you a much better chance of success in the long run.
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Old Apr 3, 2013 | 12:07 PM
  #25  
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With the head off do a complete valve job, guides, seals, decked and just purchase a head up gasket kit. Do it once, do it right.
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Old Apr 3, 2013 | 12:54 PM
  #26  
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Originally Posted by satan's rx7
I don't know how much you're willing to put into this thing but with the amount of stress that has been put on that head I would definitely have them check the mounting surfaces for squareness. If you have the time and money it would be worth it to have it checked for cracks as well.

There was no damage on the piston surface in the cylinder with the bent valves? Do the cams turn with the head off? Sounds like this guy was up to some serious tomfoolery.
Yes you can see little markings on top of the pistons were the valves touched it.
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Old Apr 3, 2013 | 01:49 PM
  #27  
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Originally Posted by satan's rx7
I don't know how much you're willing to put into this thing but with the amount of stress that has been put on that head I would definitely have them check the mounting surfaces for squareness. If you have the time and money it would be worth it to have it checked for cracks as well.

There was no damage on the piston surface in the cylinder with the bent valves? Do the cams turn with the head off? Sounds like this guy was up to some serious tomfoolery.
Yes you can see little markings on top of the pistons were the valves touched it.
Will take the advice from you guys..thanks..

Random Question? Do the valves have to be specifically meant for the car or can i get valves out a different head and have the machine shop machine them to fit or do they have to be evo specific..just curious?
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Old Apr 3, 2013 | 02:37 PM
  #28  
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Originally Posted by david23
Yes you can see little markings on top of the pistons were the valves touched it.
Will take the advice from you guys..thanks..

Random Question? Do the valves have to be specifically meant for the car or can i get valves out a different head and have the machine shop machine them to fit or do they have to be evo specific..just curious?
The valves will need to be specific to the cylinder head you have. They are cut to specific dimensions to seat properly in the head.
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Old Apr 4, 2013 | 05:51 PM
  #29  
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Thanks for all the info guys. Much appreciated. One question , I was searching for an EVO 3 gasket set on eBay but was unable to find any. Can you guys tell me what all Mitsubishi cars have the exact engine as the EVO3 and what gasket set can use on the Evo as well? Thanks guys.
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Old Apr 4, 2013 | 06:32 PM
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Just use any dsm head gasket they are the same motors. Only different is the evo came with larger turbo, 510cc injectors and usually a cyclone intake.
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