did a compression test today and F@#K NOT GOOD!!!!!!!

patsti

patsti

NitrousFed
:'( :'( :'( :'( :'( :'( :'(so today boosted helped me with a compression test and my #'s where at 135, 142, 137, and.........50 in cyl #4 so we drove it and had isht tons of knock and I removed timing added fuel and added boost to the 70%-100% throttle area with 1deg timing removed and overall areas from 20% throttle removed .5 deg timing and from there removed a few more degress and drench with fuel at knock.... so now just knocking while lifting off throttle at random areas of little to no boost... strange.

So after that started the car and a massive cloud of whiteish blue smoke shot out and my ic pipes where coated with oil, I mean dripping with it. This iis not the turbo it is fine. Its massive blow by which is not coming from the bad cyl side its coming from the good side...strage again. So removed oil and it was CLEAN but dark after 1250miles!!!!! and those where all highway a couple off roll ons to test fueling.

So wtf? My car is very very powerfull it pulls hard as heck (boosted has a 302awhp rex and my STI stage 2(with a few extras) is much faster and has tons more torque)... a stage 2 sti maxes at 290 and maybe with my tune that i did can hit max of 320awhp but Iam not a real tuner so I dont know but I did ok.

Leakdown tomorrow night thanks to james ferrari. Looks like I need to get my rings redone or going to have to get a new shortblock at works or I f'd a head.

The strange thing is I have no Idea what can cause this at 36500miles. I change oil every 3k-4k with elf syn 5w40 or delvac syn 5w40 and broke in with 1k change and 3k change of 3w30 mobile 7.5k or 15kmile non syn.

mods are utec stage 2 street tune...fmic...bov...intake...tbecattless...and some others I cant think of cause Iam sooo mad.

WHY DOES MY CAR STILL HAVE TONS OF POWER IF IT IS BLOWN? WAS THE TEST DONE WRONG?

hope its a head gasket! :'( :'( :'( :'( :'( :'( :'( :'(

 
that sucks man. is it detonation knock or mechanical knock, like a bad bearing? no amount of tuning will help that.

my best guess is that like 90% of blown sti short blocks it is broken ring lands on the piston from a bad tune or an improper tune (like running a map not for your exact setup). whitish blue smoke is oil burning, and my guess is that its getting by the blown piston.

if you want to check and see if its a head gasket, check your oil and coolant, and see if the other has mixed into them. or if there is exhaust gas building up in the coolant. you can start it up from cold and let it run for 10-15secs, then shut it off and open the rad cap. there shouldnt be any pressure at that point (still cold) but if there is its might be exhaust gas in the coolant jacket from a blown HG.

you could try redoing the test, it may have been wrong. but if it is right my guess is that your car may be fast, but it would be faster if it were running on all 4 cylinders. and a car that's running lean will always be fast, and a car that's running lean will always cook the motor.

good luck in redoing the test, you might have just had a bad seal on the gauge or something.

 
yeah ferrari let me borrow his leakdown kit and compression tester we will see for now new turbo going in and then probly a new shortblock. I think its a headgasket since it has been running rich not lean. the know was never there untill yesterday it just came(maybe bad gas). I removed almost all of it so iam thinking its not anything. I am going to go more into it and since its in my garage iam prob going to rip the motor out and finance a new raceblock.

 
yeah ferrari let me borrow his leakdown kit and compression tester we will see for now new turbo going in and then probly a new shortblock. I think its a headgasket since it has been running rich not lean. the know was never there untill yesterday it just came(maybe bad gas). I removed almost all of it so iam thinking its not anything. I am going to go more into it and since its in my garage iam prob going to rip the motor out and finance a new raceblock.
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aww, Pat, welcome to "Club TMB"

as in Too Much Boost.
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not laughing at ya, laughiing W'ITH ya, cause there's nothing else to do when things go wrong like this.

dialing up the boost and bolting on mods doesn't always have the consequences you intend

it it makes you feel any better, my partner and I have been thru at least a dozen Suby engines in the 6 years we've been trying to make em go faster That's about 2 a year....maybe we are slow learners? :
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Some blew while we were having fun, some blew because we were having too much fun, others blew because of dumb stuff we did to them (but we didn't know it was dumb at the time). others blew because of dumb stuff other ppl (garages etc) did to them. every blown engine is a step on the learning curve. you just fix what's wrong and move on.

if yours is a head gasket, symptoms will be lots of white smoke (actually it's steam/smoke from burning coolant) and/or oil in the coolant (sheen or oil blobs in the overflow tank or filler neck) and/or coolant in the oil (whitish/browninsh foaming kind of like choco mousse in the oil) or all of the above. typically the engine has a misfire with a blown head gasket...water/coolant is crappy fuel.

if the motor i's still running strong or at least feeling strong, it may be damaged rings or bearings...you will have an adventure finding out just what's busted. tuning probs may have meant that too much fuel has diluted the oil...have you noticed that the oil level has been going UP instead of down? etc etc...

condolences....but look at the bright side---this isn't a catastrophe, it's an opportunity for an upgrade, or at least do another engine that's done better second time around.

 
i may be wrong on this, but i've never seen a bad headgasket cause low compression numbers. symptoms are as nigel and i said, white smoke, oil/coolant mixing, air in coolant, etc.

white/blue smoke is oil burning, and theres only one place a blown HG can pass oil from where oil should be and into the combustion chamber. there is a `1/2" high pressure oil passage near the top corner of the head that connects oil in the block to the heads. but that in itself would have nothing to do with low compression.

 
well i didnt get to do the leakdown yet working on pulling injectors fuel pump turbo and everything in my way and then Ill do it not in a hurry since I work a lot and haven't been using the car. Ill figure it out and get a new bottom end. I am almost possitive its a ring. As Ryan owner of NEAD said to me, time for a cosworth block(yeah right 7k later). I think Ill stick with gruppe s stage 2 block if I can afford it(going to have to sell the sportbike) >
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Sell the sportbike!!!!! You can only ride it like 2 months a year anyways the car is way more fun! (and has a roof!!!) Sell the bike, sell the bike, sell the bike...... that's my vote!
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yeah I just lost a rearset I was bidding on for it and a magnetor cover. As soon as I get those and throw on the new front calipers the bike is gone or its gonna have a fp red on ithahah jk. somethings gonna need that tho

 
so today boosted helped me with a compression test and my #'s where at 135, 142, 137, and.........50 in cyl #4
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umm blown rings. cyl4. here is a way to test if it's that. dribble a little oil down cly 4. test it again. the numbers should go up if it's rings (and i'm remembering this right) and they would stay the same if it's something else.

 
yeah.. raisin.. that wouldn't be easy to get any in there. if you have a small hose or something. that test would work better on a "V" engine than "H" because you would be able to actually dribble it in there.. hmm

 
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