adam 32 Posted March 10, 2003 Share Posted March 10, 2003 after rebuilding and replacing the turbo a valve has let go on the 'test run' this was only at 10psi and under 5500rpm so not heavy conditions. at first it was a misfire so i changed coil packs, spark plugs and ignitor amps. nothing. ran a compression test, and it came up with 0 compression in cylinder 4. so it something to do with the valves i pulled the rocker covers off and rotated the cams and all 4 lifters work fine so its not the valve springs. all looks fine from the top of the engine. so it must be a bent valve or something from the bottom... but does anyone else have any ideas? is there something ive missed in the diagnostic? can anyone give me any advice with regard to pulling the head off to check from the bottom if a valve is stuffed. how much for a workshop to do this kind of job or any help is greatly appreciated. my budget is already stretched from the turbo job so i have little cash to play with thanks in advance for any help, it is much appreciated Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/ Share on other sites More sharing options...
adam 32 Posted March 10, 2003 Author Share Posted March 10, 2003 anyone? im in the shitter this time... Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-208869 Share on other sites More sharing options...
N I B Posted March 10, 2003 Share Posted March 10, 2003 It may have a lifter pumped up. see if you have any preload on any or the valves,not common thou. Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-208926 Share on other sites More sharing options...
adam 32 Posted March 10, 2003 Author Share Posted March 10, 2003 steve; do you have an endoscope at your workshop? i want to check the valves before pulling the head off, just so i know what im looking at. Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-208991 Share on other sites More sharing options...
Pva_Glue Posted March 10, 2003 Share Posted March 10, 2003 hhhmmm endoscope... I know vets have them but I dont think they will willing to lend you one... they cost as much as your engine... dang. not a good news I hear you can hire them... Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-209144 Share on other sites More sharing options...
VSPECII Posted March 10, 2003 Share Posted March 10, 2003 do a cyl leakage test first not a comp test determine whether it is in fact a inlet or exhaust valve or a slug prblem then go from there Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-209163 Share on other sites More sharing options...
N I B Posted March 10, 2003 Share Posted March 10, 2003 Yes we have an endoscope but the valves are hard to see but the pidton and bore is easy. Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-209400 Share on other sites More sharing options...
adam 32 Posted March 11, 2003 Author Share Posted March 11, 2003 cheers VSPECII im guessing any auto shop can do them... steve; you dont reckon using an endoscope is going to help me identify the exact problem before i start pulling the head off then? Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-209738 Share on other sites More sharing options...
GTS-t VSPEC Posted March 11, 2003 Share Posted March 11, 2003 Adam, Give Steve a call, 9350 5444, and ask him, he won't be online till tonight otherwise. He might be kind and lend it to you. See'ya:burnout: Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-209749 Share on other sites More sharing options...
adam 32 Posted March 11, 2003 Author Share Posted March 11, 2003 looks like it isnt going to be worth using... as someone has told me if im getting 0 compression the head has to be lifted will start removing it this weekend Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-210421 Share on other sites More sharing options...
MrMayhem Posted March 11, 2003 Share Posted March 11, 2003 strange its happened straight after a turbo swap....... I got rb20 valves in stock, and pistons Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-210461 Share on other sites More sharing options...
adam 32 Posted March 11, 2003 Author Share Posted March 11, 2003 thanks, i will definately need valves, hopefully not pistons - how much you want per valve? how could the 2 have been related? im writing it down as bad luck as i was only running the new turbo at 10psi... any thoughts, ideas? Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-210473 Share on other sites More sharing options...
osc@r Posted March 11, 2003 Share Posted March 11, 2003 your just an an lucky barstad. there's no connection.. :-) Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-210802 Share on other sites More sharing options...
VSPECII Posted March 11, 2003 Share Posted March 11, 2003 Originally posted by adam 32 thanks, i will definately need valves, hopefully not pistons - how much you want per valve? how could the 2 have been related? im writing it down as bad luck as i was only running the new turbo at 10psi... any thoughts, ideas? maybe a bolt or sumthing hard acidently fell into inlet side and bent valves let us now what actually happened ie bent or burnt valves or holes in slugs Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-210919 Share on other sites More sharing options...
osc@r Posted March 11, 2003 Share Posted March 11, 2003 Originally posted by MrMayhem strange its happened straight after a turbo swap....... I got rb20 valves in stock, and pistons Yeah u wanna eleviate on that (mac) anyone seen my 14 openender? Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-210949 Share on other sites More sharing options...
osc@r Posted March 11, 2003 Share Posted March 11, 2003 i wondered why we were short a 12mm lock nut.... damm lucky it's not my car Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-210964 Share on other sites More sharing options...
adam 32 Posted March 11, 2003 Author Share Posted March 11, 2003 ok no more jokes mr mayhem; how much you want for the valve/s? would you be able to give us any advice with regard to removing the head? cheers Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-211000 Share on other sites More sharing options...
MrMayhem Posted March 11, 2003 Share Posted March 11, 2003 never seen a rb20 burn a valve yet vavles...... $10 ea Removing the head, dont use alcohol. Big job, if you choose to accept it yourself elaboration, ever notice how on a rb twin cam how something could fall into teh exhaust manifold and land right on number 4, its teh most direct route.. A mate once found a micromachine in teh sump of a 253, might find that lock nut after all Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-211051 Share on other sites More sharing options...
adam 32 Posted March 11, 2003 Author Share Posted March 11, 2003 have you done it before? how much work are we looking at? ie man hours? could you recommend a workshop to take it to if it is too big a job? Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-211056 Share on other sites More sharing options...
MrMayhem Posted March 12, 2003 Share Posted March 12, 2003 yep several times I dont know how fast you work but put a weekend aside veale should be able to get your head gasket over. if you do it yourself theres two 10mm headed bolts holding head to block on the rear two corners on the outside of the head.... dont forget em dont screw up for timing belt settup...... workshops ...... contraversial and political theres two in bentley area id trust Link to comment https://www.sau.com.au/forums/topic/11872-busted-valve-help-needed/#findComment-212442 Share on other sites More sharing options...
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