eke_zetec_RWD Posted January 5, 2015 Share Posted January 5, 2015 But yes do a leak down before you strip it Quote Link to comment Share on other sites More sharing options...
braden Posted January 5, 2015 Author Share Posted January 5, 2015 yeah iv done the valve clearances.what about the jet valves though if there to tight will compression be down.how do you set them 1 Quote Link to comment Share on other sites More sharing options...
AllTorque Posted January 5, 2015 Share Posted January 5, 2015 The last two valves (number 4 cylinder) should be rocking at tdc. Number 1 cylinder should be on the back of the cam lobes. 2 Quote Link to comment Share on other sites More sharing options...
braden Posted January 5, 2015 Author Share Posted January 5, 2015 yeah but if there rocking says its 180 opposite to where the mark is Quote Link to comment Share on other sites More sharing options...
AllTorque Posted January 6, 2015 Share Posted January 6, 2015 So why wouldn't you turn the motor by hand so the marks line up? Quote Link to comment Share on other sites More sharing options...
kyteler Posted January 6, 2015 Share Posted January 6, 2015 Then your timing is wrong. The cylinder should be closed/valves closed during compression otherwise all your flame will escape and be pointless and you'll get low compression readings.. ..oh wait Quote Link to comment Share on other sites More sharing options...
Popular Post Spencer Posted January 6, 2015 Popular Post Share Posted January 6, 2015 This thread is frustrating. 10 Quote Link to comment Share on other sites More sharing options...
braden Posted January 6, 2015 Author Share Posted January 6, 2015 yeah I did and 1st 2 valves are rocking when the cam gear is on the mark and if I do it so cylinder 4 are rocking its 180 opposite and theres no mark there Quote Link to comment Share on other sites More sharing options...
KKtrips Posted January 6, 2015 Share Posted January 6, 2015 No disrespect but this is not something that you can diagnose only through the eyes, ears and hands of someone who does not know how crank and camshaft timing works or where the marks should be. Trying to fix cam timing over the internet is like trying to perform home surgery via instructions on a postcard. Simple answer, get your mechanic back and get him to time the cam and crank 100% correctly then perform a leakdown test - that will tell you where your compression is going and give you an idea where to go next. 1 Quote Link to comment Share on other sites More sharing options...
braden Posted January 6, 2015 Author Share Posted January 6, 2015 yeah already have timed it correctly and had checked but then I get people saying that number 4 should be rocking when number one should be.so that's what made me all confused Quote Link to comment Share on other sites More sharing options...
tortron Posted January 6, 2015 Share Posted January 6, 2015 OK well if TDC was properly confirmed and valves are in the right place it might be time to pull it down. Fresh rings should pump more than 40psi IMO. Unless you have a morry I guess then that's probably good. low comp flathead will still put out 120+ psi. Saw a really flogged one put out about 40. Cracked skirts and broken piston rings. I run about 80 in my bicycle tyres 1 Quote Link to comment Share on other sites More sharing options...
KKtrips Posted January 6, 2015 Share Posted January 6, 2015 yeah already have timed it correctly and had checked but then I get people saying that number 4 should be rocking when number one should be.so that's what made me all confusedYou do know that the crankshaft turns over twice for every one rotation of the camshaft? So if it is on TDC then either one or four will rock depending which cycle it is on. 1 Quote Link to comment Share on other sites More sharing options...
braden Posted January 6, 2015 Author Share Posted January 6, 2015 yeah man I know that.cheers im pretty sure its bent valves il do a leakdown test Quote Link to comment Share on other sites More sharing options...
Mof Posted January 6, 2015 Share Posted January 6, 2015 I had said that about the crank being out earlier. But then thought about it and it wouldn't affect thec compression as it would compress on the next stroke. It would only affect the dizzy Sounds like head and pants off sorry buddy 1 Quote Link to comment Share on other sites More sharing options...
braden Posted January 6, 2015 Author Share Posted January 6, 2015 yeah man I think head will be coming off but that's allgood iv got another sigma head with good valves so hope there the same then just be a new gasket Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted January 6, 2015 Share Posted January 6, 2015 I think this got mentioned but do these have hydraulic lifters? I assume not if you have set valve clearances? Also did you fit the cam timing wheel to the cam? And can it only go on one way? Oh and what on earth do you mean by jet valves? Quote Link to comment Share on other sites More sharing options...
Mitch.W Posted January 6, 2015 Share Posted January 6, 2015 we are talking about a 13b pp right? 1 Quote Link to comment Share on other sites More sharing options...
Raizer Posted January 6, 2015 Share Posted January 6, 2015 MCA jet valves, it's an emissions thing Edit: http://en.wikipedia.org/wiki/Mitsubishi_MCA Quote Link to comment Share on other sites More sharing options...
Mof Posted January 6, 2015 Share Posted January 6, 2015 Also did you fit the cam timing wheel to the cam? And can it only go on one way? Haha yeah classic. I see by the pics previous page it could be done, but then it probably wouldn't be on rock at tdc Braden if all the cylinders are low that would mean multiple valves bent... did the motor break a cambelt? Have you had it apart? Edit: I see gear cant be reversed on this motor /\ Quote Link to comment Share on other sites More sharing options...
AllTorque Posted January 6, 2015 Share Posted January 6, 2015 Who actually rebuilt this motor? Are we talking a full rebuild, or just a head gasket? I feel like there is more to the story here. 1 Quote Link to comment Share on other sites More sharing options...
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