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MazdaSpeed 3 - Engine, Transmission & Driveline Discussion of engine, tranny and drivelines. |
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| ![]() ![]() ![]() I don't have a leak down tester, maybe I will pick one up soon.
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| ![]() ![]() ![]() I can send you my OTC tester if you want, PM me.
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Roger that. I was just thinking with aftermarket heat management like a fan controller, you might be able to stretch the useful HP range they can survive. Its a crap shoot for sure and not worth the gamble when rebuilding.
__________________ ![]() 07 Red MS3 GT - E40 - Carrillo Rods - Wiseco Pistons - BSD - JBR 3.5 WidePath - ATP GTX3071 - Forge BPV - GA - Cobb v2 FMIC - CPE EM - CPE DP - CNT CBE - APv3 - Grim EBC - PERM dual port PCV plate - Dano dual OCC - CPE CDFP - Labonte S2 WMI - ACT Street Kit - SUv2 RMM - SU TM - "Stiffy" MM - DG CF wing ext, skirts & front lip - Hotchkis RSB/FSB w PowerGrid Links - Koni FSDs - DBA SX4000 Rotors - Hawk Pads - Silver OZ Ultraleggera - 235/40/18 NT-01 | |
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| ![]() ![]() ![]() I'm really not sure if one pull could do that. |
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| ![]() ![]() ![]() I've forgot to warm up the engine and it was too late because I had everything out so I ended up testing on cold engine. 80k/stock k04 some smoke after long idle. 1. 180 2. 180 3. 156 4. 165 Retested 3 & 4 wet and both were right on 180....FML ![]() I will redo again tomorrow on warm engine. |
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| ![]() ![]() ![]() 180 on a cold engine seems high.
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Up your idle to 900 and say goodbye to that smoke
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| ![]() ![]() ![]() Did compression today again on a warm engine....numbers were exactly the same as cold. 1. 180 2. 180 3. 156 4. 165 Wet test brought the lower numbers to 180, however, I've discovered low coolant and a little milk on my oil cap. Last summer I had water pump and coolant replaced. I don't think it could be a headgasket since oil dramatically improved those bad cylinders. Thoughts? |
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| ![]() ![]() ![]() I posted this in local section and just figured I would share in case anyone is wondering. Performed a leak down test today. Cylinder/gauge1/gauge2/%between gauges 1. 90psi/88psi/2% leaking 2. 90psi/86psi/4% leaking 3. 90psi/46psi/ SHIT LOAD(abt 46%) LEAKING coming out of the PCV/Oil fill hole 4. 90psi/79psi/12% leaking My cylinder 3 is fucked. Most likely going forged. |
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__________________ it's fun to do bad things | |
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| ![]() ![]() ![]() 900 miles after rebuild with SP63 10.5:1 pistons the compression is 195 in all 4 cylinders. |
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| ![]() ![]() ![]() Did a compression test today just to make sure everything is gonna be fine when I install my BNR S3. 84k kms on the motor. 1. 180 2. 180 3. 180 4. 180 Looks like I'm good to go.
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| ![]() ![]() ![]() Just tested today again with a working gauge (previous HF gauges all read 120 across the board) Fully bolted (minus Ex/Int Mani) on BNRs3v1 for the last 20k miles...going forged next year Left to right 168, 165, 170, 173 with 118k Miles.
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| ![]() ![]() ![]() Looking at everybody's number, I don't feel so bad now. At 120k I got: 1-170 2-181 3-175 4-170
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| ![]() ![]() ![]() @35700 1k on BT 1- 189 2- 185 3- 180 4- 186
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| ![]() ![]() ![]() 100K miles, cold wet test 210 200 195 205 I'm thinking compression gauge is a piece of shit (vatozone) but the consistency is what matters anyway.
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| ![]() ![]() ![]() Cold wet test as in engine cold and you added oil? Do a hot test with no oil to get a real idea of compression.
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| ![]() ![]() ![]() Shouldn't the heat increase my compression reading? Correct me if I'm wrong.
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| ![]() ![]() ![]() 1: 150 2: 150 3: 145 4: 145 Yay.
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| ![]() ![]() ![]() Just got my otc comp tester in the mail. 32k tuned since 9k 201 199 199 197
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| ![]() ![]() ![]() 175 70 175 175... 24800 Miles in FL Car has been at he dealership for 2 weeks with a blown Cylinder #2 trying to get a replacement engine under warranty =(
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| ![]() ![]() ![]() Metal expands with heat. Under normal operating conditions, the engine is hot and piston rings only seal properly once the engine is warmed up. Doing a compression test right after driving will give you the best picture of what your compression looks like under normal operation. You add oil to low compression cylinders AFTER doing the test to see if the leakage is at the piston ring or elsewhere in the cylinder.
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I will redo the test next time I'm working on the car.
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| ![]() ![]() ![]() Yep but before that i had 196 with a matco tester so it is what it is. I do comp tests every few months.
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You did it cold and wet. Big difference.
__________________ ![]() ![]() Inb4 85% silicone core. It's better than aluminum. What's you buddy's ex wife trap? I <3 SP63, but that port job though... "The coolant must be evaporating." Bye Felicia "Exclusivity" - CP-enis Demodded. The Seals | |
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| ![]() ![]() ![]() Tested this morning to check if everything was okay after cleaning my intake valves 2 weeks ago. Car was completely warm. Each cylinder was cranked 7 times. 1 - 180 2 - 180 3 - 180 4 - 180 Most consistent numbers I've ever had. ![]()
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| ![]() ![]() ![]() Bump'd I started getting some nasty KR (over 5) on my tune which I have been running for about a year now. 3" intake, catted dp, cbe, fuel pump, forge v1, occ, had autolite step colder, switched to itv22, problem started, switched back to autolite, still persists. The car is a 2012, had about 25k when the issue arose. I threw my maf cal onto stage 2 ots and no more knock at wot (which I'm doing significantly less of since this all started), but when I tested comp, this is what I got... 195 170 (wet was 175) 195 190 What is interesting to me is that the plug on cylinder 2 was MUCH lighter than the other 3. So for some reason that cylinder is running low comp but also much hotter than the rest. Fwiw the engine, pedals, steering wheel all vibrate somewhat harshly at any given rpm/load/speed. I checked piston height with a 3/8" extension, and cylinders 2 and 3 are identical. So at this point I'm speculating that it could be a valve issue, or injector seals, possibly both. But I'm still trying to wrap my mind around what could be causing a lean condition in #2 (no CEL however) All were gapped at .026, and rechecked when I tested, still .026 Last edited by kidlifecrisis; 09-13-2014 at 07:58 PM. |
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| ![]() ![]() ![]() I don't think that difference could cause knock. |
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| ![]() ![]() ![]() Maybe an injector issue? causing too lean conditon and knock in cylinder. Last edited by speed23; 09-14-2014 at 11:16 AM. |
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| ![]() ![]() ![]() I threw a half pint of seafoam in a 3/4 full tank this morning, it seems to be running a bit smoother but I'll see how it goes as I burn through this tank. Seems that the low comp could be a symptom of the knock, which itself is caused by a fuel issue Last edited by kidlifecrisis; 09-14-2014 at 05:30 PM. |
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| ![]() ![]() ![]() Doing my first test, 130 dry test on the nose across the board, tested at a temp of 165. 2008.5 45k miles, no CEL's, no smoke, not eating oil /and runs smooth. Bad gauge? |
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| ![]() ![]() ![]() Did you do a wet test? If there all exactly 130, I would bet the gauge is toast.
__________________ ![]() ![]() Inb4 85% silicone core. It's better than aluminum. What's you buddy's ex wife trap? I <3 SP63, but that port job though... "The coolant must be evaporating." Bye Felicia "Exclusivity" - CP-enis Demodded. The Seals Last edited by Tokay444; 09-20-2014 at 05:42 PM. Reason: MSF Database - Automerged Doublepost |
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Now that I think about it, the packaging of the tester was kind of sliced up near the extension and gauge, I'm going to go borrow one from Autozone tomorrow. Last edited by googlebutt; 09-20-2014 at 06:43 PM. | |
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| ![]() ![]() ![]() Did mine again today - dry test at 192,500 original miles on the engine: 155-150-150-160. There's life in her yet! Did a leak down test on 4, and got just a little coming through exhaust, nothing past the rings. Overall, pretty happy about it, as we are about to add E85 to my tune on the BNRS3.
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| ![]() ![]() ![]() New OEM motor, 900 miles, warm (sat for ~30 mins after turned off). 176 - 176 -176 -176 This pleases me.
__________________ 2006 MS6 WWP Sport - 340whp/350wtq JBR 3"- BNRS3V2 - GS EBCS - CUSTOM FMIC - CS IM - LTR7IX - CMGS WMI & D07 GA - TURBOXS HEADER - FIDANZA FW - CP-E CATTED DP - 3" CATBACK BILSTEIN - H&R SPRINGS - 18x8.5 +48 ROTA SVN - 265/35R18 HTR ZIII MINI H1 6.0 - CAR LED TAILS SEE MORE USING !SHOUTTAG.COM - ENTER: !6SPEED6 Last edited by dale_gribble; 09-21-2014 at 11:00 AM. |
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| ![]() ![]() ![]() Tested mine a few weeks ago 180 150 180 180 Rebuild in progress, cracked ringland on cyl 2.
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| ![]() ![]() ![]() Scoped the cylinder in question, this is what it looked like. ![]() It looks like a hot spot on the piston? Or maybe some anti seize got in there from when I did the comp test, hard to tell and being the first time I've looked inside a motor I don't have much of a baseline |
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| ![]() ![]() ![]() So I posted a while back that the brand new Innova (3614) gauge I used gave me a reading of 130psi across all cylinders. Ordered the Innova gauge with the solid rubber hose (3612) and just got 185 190 190 190. Beware if you buy that gauge. |
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