mellonman Posted October 17, 2011 Share Posted October 17, 2011 (edited) i will start off and let everyone know whats happend my hybrid turbos let go and sent oil and god know what round the engine, so i stripped of the turbos to access damaged and iit was bad, so thought i would do a compression test to see if i could find any clear troubles, the problem i have is that the cyclinders are full of oil and i clearly see it in some of them 1=219 2=205 3=204 4=195 5=192 6=200 now these results seem way high to my understanding but do make sence as there full of oil and number 1 would of got the most. does anyone know how to clear the oil so i can get a more clear reading or is it head off job Edited October 18, 2011 by mellonman (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 17, 2011 Share Posted October 17, 2011 They don't show anything too terminal, you need to borescope and leakdown test it, too. Quote Link to comment Share on other sites More sharing options...
mellonman Posted October 17, 2011 Author Share Posted October 17, 2011 i would love to do the leak down test but i cant move it,http://www.mkivsupra.net/vbb/showthread.php?256686-leakdown-test-would-this-work-and-understanding would this work i will see if my friend can get hold of a bore scope. is there a way i can clear the oil from the pistons with no turbos attacted Quote Link to comment Share on other sites More sharing options...
Guest ugp Posted October 17, 2011 Share Posted October 17, 2011 Spin it over on the starter with the plugs out? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 17, 2011 Share Posted October 17, 2011 Yes, as above. It'll drain past the rings in a day, if you just leave it, anyway. Quote Link to comment Share on other sites More sharing options...
mellonman Posted October 17, 2011 Author Share Posted October 17, 2011 its been sat since saturday but i can still clearly see oil on the pistons and on the plugs when i took them out. i mean when i took the plugs off they was coated in oil. could i spay carb cleaner down into the cylider to fin out the oil and then suck that out or let it drain off Quote Link to comment Share on other sites More sharing options...
Guest ugp Posted October 17, 2011 Share Posted October 17, 2011 No, the carb cleaner will go straight past the rings and into the sump. There may still be a coating of oil on the plugs, but as long as its not swimming in the stuff, you should be fine. As mentioned above, spin it over on the starter with the plugs out, that will get rid of it Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted October 17, 2011 Share Posted October 17, 2011 But cover the top of the engine with a towel or something unless you want oil blasted all over the place lol. Quote Link to comment Share on other sites More sharing options...
Guest ugp Posted October 17, 2011 Share Posted October 17, 2011 But cover the top of the engine with a towel or something unless you want oil blasted all over the place lol. I assumed the chap had some common sense and didn't want to appear patronizing by saying that Quote Link to comment Share on other sites More sharing options...
mellonman Posted October 17, 2011 Author Share Posted October 17, 2011 the engine was spinging over with the plugs off when i was doing the compression test, the plugs when i took them out did have enough oil on them to make a drip or 2.none come out the bloke when testing so maybe theres not as much as i thought Quote Link to comment Share on other sites More sharing options...
Guest ugp Posted October 17, 2011 Share Posted October 17, 2011 I wouldn't worry about that, it will burn off. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 17, 2011 Share Posted October 17, 2011 Exactly, oil will stop the bores rusting while you fix up the rest of the stuff Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted October 17, 2011 Share Posted October 17, 2011 I assumed the chap had some common sense and didn't want to appear patronizing by saying that Oh no, screw that, straight in with both feet Quote Link to comment Share on other sites More sharing options...
mellonman Posted October 18, 2011 Author Share Posted October 18, 2011 well i will give it ago again later,to see it that no1 comes down abit if that oil has a chance to drian off. im gutted i cant really do a leak down test as i dont have the tool or means to move the car, is there a mobile service that could do it anyone know of i can get hold of a small compressor? Quote Link to comment Share on other sites More sharing options...
mellonman Posted October 18, 2011 Author Share Posted October 18, 2011 Oh no, screw that, straight in with both feet with that im mind i might just slap a single turbo on Quote Link to comment Share on other sites More sharing options...
mellonman Posted October 18, 2011 Author Share Posted October 18, 2011 okay so after another day and some turning over to clear what was left of some oil, i redone the compression tests the results as follows 1=200 2=195 3=199 4=193 5=185 6=200 so as 5 was down i done it again and it dropped by another 5psi so i thought what the hell done it again and it dropped again by another 5psi till i was at 175 and then stayed at 175 so i put some oil down the hole to check to see if its the rings and tested again and it shot back up to 200. so what to do with it all does it need a rebuild? Quote Link to comment Share on other sites More sharing options...
Guest ugp Posted October 18, 2011 Share Posted October 18, 2011 (edited) Sounds like the rings on cyl 5 are worn. Personally, I wouldn't rebuild it. How many miles are on the engine? What are your plans? Staying TT or going single? I've seen some of our engines win races time and time again with one cylinder down on compression by ~20%. Changing the rings would mean dropping the sump, unbolting the rod and pushing the lot out of the top. Not sure how much a set of rings are, however for my V8, oversized aftermarket rings were 190 quid for a set. Edit: Without wanting to state the obvious, if your taking the head off, might as well change the belts, water pump etc etc. Edited October 18, 2011 by ugp (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 18, 2011 Share Posted October 18, 2011 I wouldn't take too much notice of compression test results, especially after it's had a drink of oil. Either get a leakdown test done or toss a coin. The results don't look terrible, it should at least run I use a diving bottle full of compressed air at 207 bar and a regulator to do stuff like that away from a compressor, but I ain't bringing it to Kent, sorry Quote Link to comment Share on other sites More sharing options...
mellonman Posted October 18, 2011 Author Share Posted October 18, 2011 I wouldn't take too much notice of compression test results, especially after it's had a drink of oil. Either get a leakdown test done or toss a coin. The results don't look terrible, it should at least run I use a diving bottle full of compressed air at 207 bar and a regulator to do stuff like that away from a compressor, but I ain't bringing it to Kent, sorry i do so love your engenuity chris, looks like i will just do the bodge leak down test and see whats what.it did run okay before the turbos let go there is that and the bits of turbo didnt do any damage and its just worn rings which i would expect from a car that has done 140,000 miles. i was going to go small single as there was a setup going cheap. that worked out cheaper then doing hybrids again that might go bang again next year. Quote Link to comment Share on other sites More sharing options...
Guest ugp Posted October 18, 2011 Share Posted October 18, 2011 140k? They aren't bad results at all. Infact, I would be over the moon with them! Whack the bloody single on it and drive the thing Quote Link to comment Share on other sites More sharing options...
mellonman Posted October 18, 2011 Author Share Posted October 18, 2011 140k? They aren't bad results at all. Infact, I would be over the moon with them! Whack the bloody single on it and drive the thing really? i still think something is wrong why are they so high results,the book said 0.9 - 12 bar i was getting nearly 14 but that might be cos the oil still sitting on the rings and i guess as im still getting the high results 3 days later the rings must be good to even have the oil still there . Quote Link to comment Share on other sites More sharing options...
Guest ugp Posted October 18, 2011 Share Posted October 18, 2011 That would be my guess anyway. When you do fire it up, expect some blue smoke Quote Link to comment Share on other sites More sharing options...
mellonman Posted October 18, 2011 Author Share Posted October 18, 2011 When you do fire it up i like your thinking did give me a smile when i was starting to feel very down. Quote Link to comment Share on other sites More sharing options...
dude Posted October 18, 2011 Share Posted October 18, 2011 You can hire a small compressor at any tool hire shop, comp looks better than expected mine was still running 10's at 120 psi per cylinder !!!!! Quote Link to comment Share on other sites More sharing options...
mellonman Posted October 19, 2011 Author Share Posted October 19, 2011 i can get a compressor no trouble at all but i dont have the tool to do the test or will the bodge one do? Quote Link to comment Share on other sites More sharing options...
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