ross615 Posted December 6, 2010 Share Posted December 6, 2010 i have a 89 crx si with a d16a6 and the other day while driving it started missing like maybe a bad plug wire so the next day i went to change plug wire with another used one i had and it still ran bad when driveing it bogs down and shakes so i dide a compression check and my #1 cylinder only has 70 psi the rest havve 120 psi my car doesnt smoke but does this mean i have a bent valve or is it something else? Link to comment Share on other sites More sharing options...
Humphries Posted December 6, 2010 Share Posted December 6, 2010 Bent valve(s). Is my guess. Id check that out and keep my valves adjusted more regularly Link to comment Share on other sites More sharing options...
ross615 Posted December 6, 2010 Author Share Posted December 6, 2010 Bent valve(s). Is my guess. Id check that out and keep my valves adjusted more regularly you dont think one could be to tight do Link to comment Share on other sites More sharing options...
DelSolSweetie Posted December 6, 2010 Share Posted December 6, 2010 have you tried to do a valve job? if not it wouldnt be too tight if they havent been messed with might also be a ring issue.. compression rings and oil rings are different.. normally itd be smoking though Link to comment Share on other sites More sharing options...
ross615 Posted December 27, 2010 Author Share Posted December 27, 2010 have you tried to do a valve job? if not it wouldnt be too tight if they havent been messed with might also be a ring issue.. compression rings and oil rings are different.. normally itd be smoking though it was suposed to have a complete rebuild with eagle rods, vitara pistons and been bored .30 and a competition cam i mean we put it on dyno it has 150 hp and i thought that was pretty good for a d16a6 so i think its had something done to it do you think that the skunk 2 cam gear could need adjusting? Link to comment Share on other sites More sharing options...
DelSolSweetie Posted December 27, 2010 Share Posted December 27, 2010 have you had it tuned since this was done? Link to comment Share on other sites More sharing options...
ross615 Posted December 27, 2010 Author Share Posted December 27, 2010 have you had it tuned since this was done? nope i mean i didnt do the build Link to comment Share on other sites More sharing options...
ross615 Posted December 29, 2010 Author Share Posted December 29, 2010 nope i mean i didnt do the build ok could it be rings like compression rings? the cylinders all hade 145 but the #1 it had 75 is there a type of bars leak i can buy to temporaly fix Link to comment Share on other sites More sharing options...
Raley Posted December 30, 2010 Share Posted December 30, 2010 so 1 is at 75 and the rest are at 145? drop alil oil into number 1 and see what compression is... (just like 1/8th of a quart) if it goes up to a decent(ish) number your rings are bad... if it doesn't change at all its valves and if it just changes a tiny bit (10-15psi) id say your rings are so fracked you may as well stop driving it. Link to comment Share on other sites More sharing options...
ross615 Posted December 30, 2010 Author Share Posted December 30, 2010 so 1 is at 75 and the rest are at 145? drop alil oil into number 1 and see what compression is... (just like 1/8th of a quart) if it goes up to a decent(ish) number your rings are bad... if it doesn't change at all its valves and if it just changes a tiny bit (10-15psi) id say your rings are so fracked you may as well stop driving it. ok thanks man ill try it so how hard is it to put rings in? and what do i do take plug out then drop oil in and then do test on it Link to comment Share on other sites More sharing options...
Raley Posted December 30, 2010 Share Posted December 30, 2010 yup, pull plug, pour oil down there, throw compression tester on it, crank it 3ish times and check it.. (can do more but 3 solid cranks is enough) you don't wanna run the car on 3 cylinders... to replace rings you need to pull the head, (sohc motors dont need to remove cam), then you need to pull the oil pan and girdle off, unbolt the rod from the crank, push piston and rod up out of motor, remove rings, put new rings on, put it back down and in... could be that your rings are all in line (the gaps) but doubtful. to put it back in you need a ring compressor, can be done without but thats a pain in the ass... air cooled VWs is the only decent way... you wanna make sure the rod bearings are good (check for wear) then tighten to spec, put everything back together, do timing... good to go. (id say 2-3 total hours of work from start to finish if you have everything right there and know what you are doing, for the average joe... a full day. could be just that your valve lash is off too... causing the valve to stay open. Link to comment Share on other sites More sharing options...
ross615 Posted December 30, 2010 Author Share Posted December 30, 2010 yup, pull plug, pour oil down there, throw compression tester on it, crank it 3ish times and check it.. (can do more but 3 solid cranks is enough) you don't wanna run the car on 3 cylinders... to replace rings you need to pull the head, (sohc motors dont need to remove cam), then you need to pull the oil pan and girdle off, unbolt the rod from the crank, push piston and rod up out of motor, remove rings, put new rings on, put it back down and in... could be that your rings are all in line (the gaps) but doubtful. to put it back in you need a ring compressor, can be done without but thats a pain in the ass... air cooled VWs is the only decent way... you wanna make sure the rod bearings are good (check for wear) then tighten to spec, put everything back together, do timing... good to go. (id say 2-3 total hours of work from start to finish if you have everything right there and know what you are doing, for the average joe... a full day. could be just that your valve lash is off too... causing the valve to stay open. how do u fix the valve lash? Link to comment Share on other sites More sharing options...
Raley Posted December 30, 2010 Share Posted December 30, 2010 look that one up on youtube, its easy but kinda hard to explain. Link to comment Share on other sites More sharing options...
ross615 Posted December 30, 2010 Author Share Posted December 30, 2010 look that one up on youtube, its easy but kinda hard to explain. ok i was thinking bout just doing a mini me swap and drop a z6 head on my block would i need a vtec wireing harness and ecu or would mine work? Link to comment Share on other sites More sharing options...
Raley Posted December 30, 2010 Share Posted December 30, 2010 ummm... you won't have vtec wiring, is your motor a dual point? (kinda looks carborated) Link to comment Share on other sites More sharing options...
ross615 Posted December 30, 2010 Author Share Posted December 30, 2010 ummm... you won't have vtec wiring, is your motor a dual point? (kinda looks carborated) nope mines not carburated Link to comment Share on other sites More sharing options...
Raley Posted December 31, 2010 Share Posted December 31, 2010 ok, that means that more of the wires are there, but not all of them... check out some of those wiring swap sites (chase bays or what ever) and look at the different kits they make for your car, that might help you realize what wires you will have to add/modify Link to comment Share on other sites More sharing options...
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