BAZ2CRAZY Posted February 28, 2010 Share Posted February 28, 2010 Ive just done a compression test on a cold 1993 GT 4e-fte. Open throttle.Looking from the front,left to right.1. 160 psi2. 148 psi3. 150 psi4. 141 psi.I re-tested the 1st cyclinder as it was largely different from the rest and ended up receiving a slightly higher result.I only tested the other 3 cylinders onceWould the engine being cold have any effects etc?How does it look?Cheers Mitch Quote Link to post Share on other sites
BAZ2CRAZY Posted February 28, 2010 Author Share Posted February 28, 2010 BumplesMitch Quote Link to post Share on other sites
iamlegend Posted February 28, 2010 Share Posted February 28, 2010 seems to be ok but i think 2 and 4 are pretty low..... should be 160 across all 4 for a healthy result Quote Link to post Share on other sites
BAZ2CRAZY Posted February 28, 2010 Author Share Posted February 28, 2010 Ive read that. But if also read that there lower when cold?Can someone confirm this?Mitch Quote Link to post Share on other sites
rmsnoel Posted February 28, 2010 Share Posted February 28, 2010 Put a tea spoon of oil in each cylinder and retest. If compression raises then you have worn piston rings. What mileage and boost have you. Genuine toyota headgasket £30, Toyota rings £70, valve stem oil seals £70. Thats her rebuilt, job done.Also a leak down test ie blow air into spark plug holes will tell you if youve a leaky valve Quote Link to post Share on other sites
scot-ish Posted February 28, 2010 Share Posted February 28, 2010 better to warm it up, and then test it, then you will get a result that you can take better info from. Quote Link to post Share on other sites
bucketep91 Posted February 28, 2010 Share Posted February 28, 2010 aye your supposed to warm it up to operating temperature first, id do that and try again because thats not the best of results u got there Quote Link to post Share on other sites
BAZ2CRAZY Posted February 28, 2010 Author Share Posted February 28, 2010 As far as i am aware. Its ran standard boost since factory. The car is currently off the road and has been ran once or twice over 4+months.Approx 95k milesI wish it was as simple to just rebuild the engine. but its alot of time and effort... ive never taken an engine out of a car before.However... i think i would consider it depending on how bad the engine really is.Think im going to re-test it once warmed up. A possibly theory could be that becuase the components arent at operating temp.. the rings wouldnt of expanded creating a tight seal.... meh. i hope.Mitch Quote Link to post Share on other sites
scot-ish Posted February 28, 2010 Share Posted February 28, 2010 what youve said is why its always low when cold, and you shouldnt do it like that.the engine build isnt hard mate, its a learning curve. and there are videos from chris i think it is from greece, where he has talked through a complete engine build, with correct torque's and everything. Quote Link to post Share on other sites
BAZ2CRAZY Posted March 2, 2010 Author Share Posted March 2, 2010 Scot-ish- yeah dude, im farely competent with my hands etc. Im just paranoid i would take forever and end up not finishing it.Right UPDATE. I did a re-test once the engine had warmed up to normal operating temps. I received:1.1702.1713.1744.173 wheeey, now thats an improvement.For any one using the search bar;Compression test when the engine is warm/just ran.Mitch Quote Link to post Share on other sites
bucketep91 Posted March 2, 2010 Share Posted March 2, 2010 thats much better mate:D Quote Link to post Share on other sites
BAZ2CRAZY Posted March 2, 2010 Author Share Posted March 2, 2010 Its a huge relief!Mitch Quote Link to post Share on other sites
scot-ish Posted March 2, 2010 Share Posted March 2, 2010 just shows for anyone interested, how much of a difference it can be, when not done correctly, nice results there, seems nice and fresh still. Quote Link to post Share on other sites
BAZ2CRAZY Posted March 3, 2010 Author Share Posted March 3, 2010 Woohooo. I was expecting cyl 3 to be a little bit pants. However i believe this cars had a sps manifold for donkys years. Happy boostings!Mitch Quote Link to post Share on other sites
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