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Old 13-03-2013, 19:01   #1
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Talking 4g63 evo 6 dropped valve.

Hi all,

Does anyone know where I can find a step by step guide to take my engine apart so I can change a possible dropped valve?

Preferably with pictures. I'm more of an intermediate with vehicle repairs. However, never stripped an engine before (let alone the one in my baby)

I have had a few quotes from garages etc. And figure its all mechanical so as long as I follow a guide to the letter I sshould be ok and save £££'s.
Just not to sure where to start? ?
Any help would be greatly appreciated.
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Old 13-03-2013, 19:08   #2
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Download the workshop manual on here for a start.
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Old 13-03-2013, 19:21   #3
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I have now downloaded the manual (didnt realise they were on here) still would prefer a picture guide if anyoneknows of one? Otherwise I'll have to try the exploded diagrams in the manual and see what happens.
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Old 13-03-2013, 22:51   #4
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Clearly stupid noob questions but I would rather ask....
1. Do I drain the oil first (im thinking yes?)
2. Is it easier removing the drivers side wheel and arch liner to access the pulleys etc?
3. With the icy snowy weather do I need to be concerned about liquid ingress to the engine? Will a simple coverbe ok once its all apart?

Sorry if it seems like stupid questions to you all but I have to learn somewhere.
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Old 13-03-2013, 23:01   #5
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Tbh mate if you've never stripped engines before this is going straight in at the deep end and why do you think you have dropped a valve?
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Old 13-03-2013, 23:10   #6
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I realise it will be straight in but usually if I have the instructions or a general idea im ok.... the mechanic that recovered me said based on the clicking noise it was making, followed by the clunk after it died. Then seemed to of seized (won't crank) obviously until it is stripped this can't be confirmed but speaking to several garages they all seem to come to the same conclusion of possibly a dropped valve.
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Old 13-03-2013, 23:15   #7
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Firstly see if you can turn the engine by hand, ie ratchet socket on bottom pulley turn over a few times, not impossible but I wouldn't say a dropped valve, drain oil and check for debris
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Old 13-03-2013, 23:18   #8
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Pull plugs out and have a look inside
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Old 13-03-2013, 23:18   #9
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Am I to take the cam belt off before turning by hand? (Again may sound like simple questions I know)
Will drain oil off tomorrow and check.
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Old 13-03-2013, 23:21   #10
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Quote:
Originally Posted by sbn1979 View Post
Pull plugs out and have a look inside
I have taken the plugs out and rocker cover off but cannot see anything out of place (although arent the valves etc. On the under side (on top of pistons) so I wouldn't be able to see damage if any without taking all the cams out
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Old 13-03-2013, 23:33   #11
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Not being funny but I dont think its a good idea you attempting this yourself. If you have dropped a valve and the engine is completely looked up chances are you have probably done some serious damage.
Pull all the plugs and attempt to turn the engine over by hand, If you have dropped a vale looking down the plug holes you would probably be able to see some signs of damaged. Have you drained the oil or removed the cam cover to check for signs of damage?
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Old 13-03-2013, 23:34   #12
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Look down in the plug holes see if you can get access to a bore scope
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Old 13-03-2013, 23:38   #13
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Quote:
Originally Posted by Mode-x View Post
I have taken the plugs out and rocker cover off but cannot see anything out of place (although arent the valves etc. On the under side (on top of pistons) so I wouldn't be able to see damage if any without taking all the cams out
Normally when you drop a valve if you take off the cam cover you will find a broken valve spring or at least one with a missing cap/retainers
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Old 13-03-2013, 23:42   #14
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Quote:
Originally Posted by benashley View Post
Not being funny but I dont think its a good idea you attempting this yourself. If you have dropped a valve and the engine is completely looked up chances are you have probably done some serious damage.
Pull all the plugs and attempt to turn the engine over by hand, If you have dropped a vale looking down the plug holes you would probably be able to see some signs of damaged. Have you drained the oil or removed the cam cover to check for signs of damage?
Any feedback is always a help. I realise may not be the best idea but I have already resided to the fact new block is worst case scenario just figure if I can sort it myself why not if it does all go wrong then I get a new block put in.
Top cover is off and all seems ok comparing to various pictures oil will be drained tomorrow.
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Old 13-03-2013, 23:44   #15
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Ok so far then its more likely not a dropped valve, I need to try and turn engine by hand(without plugs in) .... do I need the cam belt off or on for this?
And I need to drain oil and check for debris.
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