Johnboy GT Posted March 24, 2015 Share Posted March 24, 2015 I would have thought 150 across all four was pretty good although lower than new. Try a different compression tester and your leakdown test and see from there bud?John Quote Link to post Share on other sites
5e colin Posted March 24, 2015 Share Posted March 24, 2015 if mine drops below 160 it gets a re build every time >>> new rings ( with a hone ) conrod bearings and relap the valves i have around 175/180 on all 4 leakdown says all Quote Link to post Share on other sites
mikey4410 Posted March 24, 2015 Author Share Posted March 24, 2015 yeah the best step is timing check.then after that if its ok then a leakdown test will be done on friday. :-Dif I wuda been at 160 I would still be doing all this. I like things to be perfect and in order. Quote Link to post Share on other sites
Phil Posted March 24, 2015 Share Posted March 24, 2015 PS if your doing this yourself...then ive no problem. Colin would rebuild his own also, adam maybe aswell... but if you paying someone hundreds of quid...... then it doesnt add up for me. Phil Quote Link to post Share on other sites
mikey4410 Posted March 24, 2015 Author Share Posted March 24, 2015 yes all myself for sure. I built a forged engine in 2010 for my gt turbo and it was perfect. love working on me own car.its a pleasure. Quote Link to post Share on other sites
Phil Posted March 24, 2015 Share Posted March 24, 2015 yes all myself for sure. I built a forged engine in 2010 for my gt turbo and it was perfect. love working on me own car.its a pleasure. then do as you please. Phil Quote Link to post Share on other sites
AdamB Posted March 24, 2015 Share Posted March 24, 2015 (edited) yeah the best step is timing check.then after that if its ok then a leakdown test will be done on friday. :-Dif I wuda been at 160 I would still be doing all this. I like things to be perfect and in order. I understand where you're coming from buddy, but I have to say this. No matter how anal you want/prepared to be, you're driving a road going car with components such as piston rings, headgaskets etc that are designed for reliability and to last. There is no need to be upset about the way the engine is pulling X, Y and Z figures because I can assure you, even after a rebuild and 2000 miles later you will have 2% leakage because that's the leakage you get during the break in period. The wear rate does slow down after this though, hence why engines can go on for over 250k miles before a serious drop in performance is noted. The cost, labour, time and effort to rebuild a motor essentially because it's dropped to 160psi compression probably every 30k miles is a notoriously painstaking one. I'll just say to hold off till you're not able to see the car behind in you're rear view mirror because you've choked them to death with burnt oil Just my 2p, the desired goal needs to be set and it needs to be realistic Edited March 24, 2015 by AdamB Quote Link to post Share on other sites
jayc-glanza17 Posted March 24, 2015 Share Posted March 24, 2015 Adam speaks exactly what I feel mikey.do u have any oil loss/burning issues?If not probably not worth worrying about..But for peace of mind could always borrow a bore scopeTo see state of pistons.. Quote Link to post Share on other sites
mikey4410 Posted March 24, 2015 Author Share Posted March 24, 2015 doesnt burn oil whatsoever :-Dpistons were in superb order last year when I did headgasket. Quote Link to post Share on other sites
Ethanep82 Posted March 24, 2015 Share Posted March 24, 2015 It's because you are not running the 3bar CT9 mikey ;) Quote Link to post Share on other sites
mikey4410 Posted March 26, 2015 Author Share Posted March 26, 2015 update guys and girls,checked timing and was out a tooth and made the inlet open late and close late. so anyway was fixed and redid compression and now I have 170 psi over all four cylinders abd well chuffed Quote Link to post Share on other sites
MARC MOSS Posted March 27, 2015 Share Posted March 27, 2015 After all that lol glad it's something somple mate, now get it mapped and re dyno'd Quote Link to post Share on other sites
5e colin Posted March 27, 2015 Share Posted March 27, 2015 """""""The cost, labour, time and effort to rebuild a motor essentially because it's dropped to 160psi compression probably every 30k miles is a notoriously painstaking one.""""""""" @ adamb , it wont wear that fast !!! mine only lost 5 psi sinds rebuild 3 years ago Quote Link to post Share on other sites
mikey4410 Posted March 27, 2015 Author Share Posted March 27, 2015 haha.well apparently mines lost 5psi in 15years.we cant all have extreme wear now can we!!!. Quote Link to post Share on other sites
mikey4410 Posted March 27, 2015 Author Share Posted March 27, 2015 based on them having 175 from new. Quote Link to post Share on other sites
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