SBT Posted January 17, 2018 Share Posted January 17, 2018 And the leakdown numbers were? - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
JazzAvi8r Posted January 17, 2018 Author Share Posted January 17, 2018 same as they were before. all within spec. Link to comment Share on other sites More sharing options...
aj_mariner Posted January 17, 2018 Share Posted January 17, 2018 Time to crack a beer and light a smoke. Link to comment Share on other sites More sharing options...
JazzAvi8r Posted January 17, 2018 Author Share Posted January 17, 2018 already had a smoke. not drinking until i can come up with some other possible explanation. i'm still convinced it's timing -- I just dont know how. the marks are absolutely perfect. Link to comment Share on other sites More sharing options...
aj_mariner Posted January 17, 2018 Share Posted January 17, 2018 Well, if you are convinced it’s timing...then the only thing left is the intake AVCS hydraulic actuator inside the sprocket. Make sure that is clean and good to go. After that...parts ma deuce. Link to comment Share on other sites More sharing options...
aj_mariner Posted January 17, 2018 Share Posted January 17, 2018 And cleaning out that side OCV and exercising for action Link to comment Share on other sites More sharing options...
JazzAvi8r Posted January 17, 2018 Author Share Posted January 17, 2018 Doesnt the avcs stay in the zero position until oil pressure gets there? Link to comment Share on other sites More sharing options...
aj_mariner Posted January 17, 2018 Share Posted January 17, 2018 The OCV controls that. It does need oil pressure to advance the timing. But if there is any junk in there not allowing it to be in the zero position then...it might throw a P011 or P021 (depending on which side of the engine). But I don’t know how much deviation triggers the code...or if it only throws the code when it can’t advance the timing. Another thought... Have you pushed on all the valves with the cams out to check and see if they move freely and aren’t hanging up in the guides? Link to comment Share on other sites More sharing options...
xt2005bonbon Posted January 17, 2018 Share Posted January 17, 2018 Your engine is super strange man. In any case, even if the valve clearance does not appear to be the culprit for this very issue, you would still have problems down the road with a warm engine at some point, like misfires and stuff like that. Maybe you just need to put it back together and get that engine to operating temp, push that thing to the max; then somehow the rings will provide a better seal once again? All I know is my 05 sat the past 6 months while I was doing a lot of work on it (mostly transmission stuff). Then when it was time to crank, she sounded like she completely lost compression. I freaked out. Thought it was timing and stuff. I ended up cranking the engine for quite a while and then she finally ran. Then I drove her like I stole it for a couple of days, pushed her and stuff. She now runs great, no misfires at all. I don't know. YMMV... Take a break though. Link to comment Share on other sites More sharing options...
JazzAvi8r Posted January 17, 2018 Author Share Posted January 17, 2018 so frustrating.... Link to comment Share on other sites More sharing options...
JazzAvi8r Posted January 17, 2018 Author Share Posted January 17, 2018 i didnt push in the valves without the cams installed. but i was able to cycle them fine by spinning the cams before i put the timing belt on. Link to comment Share on other sites More sharing options...
aj_mariner Posted January 17, 2018 Share Posted January 17, 2018 No binding or hang ups? Squirt fresh oil in the guides to make sure? Besides that and the intake AVCS hyd actuator...I’ve gotta smoke a couple more. How much do you trust your leak down tester and what pressure you testing at? Link to comment Share on other sites More sharing options...
JazzAvi8r Posted January 17, 2018 Author Share Posted January 17, 2018 it seemed ok. testing at 100psi. any chance it could be ringlands? Link to comment Share on other sites More sharing options...
Moderators BarManBean Posted January 17, 2018 Moderators Share Posted January 17, 2018 I'm not sure I see what else it could possibly be... "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock Link to comment Share on other sites More sharing options...
JazzAvi8r Posted January 17, 2018 Author Share Posted January 17, 2018 i'm going to do a wet compression test tomorrow just for grins. I want to rule out any issues with the rings or bottom end. Link to comment Share on other sites More sharing options...
aj_mariner Posted January 17, 2018 Share Posted January 17, 2018 You had her at parade rest and didn’t see any sign of that...pistons and cross hatching looked good. Is it possible to borrow another leak down tester? I don’t know if I would put her back in the car yet. AVCS hyd actuator in sprocket not going to home position I would want to blue the valve seats and make sure they are seating proper check to see if there is any slop or binding between the valve stem and guides Valve guide position in head (making sure a guide didn’t drop interfering with the valve) check if #2 and #4 have the same distance from the top of the cylinder at both TDC and BDC. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted January 17, 2018 Share Posted January 17, 2018 If it was timing, wouldn't #4 be affected too since they are on the same bank? Did you check compression in that cylinder? Link to comment Share on other sites More sharing options...
JazzAvi8r Posted January 17, 2018 Author Share Posted January 17, 2018 AJ, the engine is already in the car. everything you're suggesting requires me to pull it out again AND remove the head. If I do that, I'm just taking the head to a machine shop. I haven't checked #4 yet, but given that cyl2 had the same reading as before, i'd bet cyl4 also reads the same as before. I'll double check that tomorrow as well. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted January 17, 2018 Share Posted January 17, 2018 This thing is nuts. Valve clearance, check. cold leakdown, check timing (teeth count, timing marks) check cam sprocket properly aligned with dowel pin, check what's left?? ringland? headgasket not properly seated? Back to my question though. Regardless of your current compression reading in #4, if timing is off and is affecting cylinder #2, would cylinder #4 be affected too? Link to comment Share on other sites More sharing options...
xt2005bonbon Posted January 17, 2018 Share Posted January 17, 2018 By the way, that'd be 'funny' if that compression problem existed before you even worked on the engine. But the engine ran OK somehow.. Link to comment Share on other sites More sharing options...
JazzAvi8r Posted January 17, 2018 Author Share Posted January 17, 2018 yes, cyl4 would also be affected. I honestly don't think the headgasket was the problem to begin with. when I bought the car, it was misfiring in 2&4 under 3k RPM. typically misfires on the same bank are a result of a blown headgasket, so that's what we went with first. clearly, that wasn't the issue. the car never overheated either. here's a question: if, for whatever reason, I had a bent valve stem, would the leakdown test show that? Link to comment Share on other sites More sharing options...
xt2005bonbon Posted January 17, 2018 Share Posted January 17, 2018 Actually, from my 'humble' experience on the forum, almost every single time I've seen reports of misfires on a given bank, it was due to bad timing; which would make sense. I wonder if your cam sprocket is working right. Then again, it would affect cylinder 4 too no??? Dang it. As for your question regarding bent valve stem, I am not sure. Link to comment Share on other sites More sharing options...
ehsnils Posted January 17, 2018 Share Posted January 17, 2018 And I still wonder if one of the sprockets are mounted wrong for some reason on one of the cams so the timing of either intake or exhaust is off. A broken guiding pin and you would get that. Or the guiding pin forced into the wrong hole in the sprocket - it's aluminum sprockets from what I understand. At least if there's something that causes both cylinders in the same bank to have bad compression it has to be something common. Or a crack in the block between the cylinders that only is widening when the pressure gets high enough so it won't show up on a leak-down test. Pretty far fetched though. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted January 17, 2018 Share Posted January 17, 2018 And I still wonder if one of the sprockets are mounted wrong for some reason on one of the cams so the timing of either intake or exhaust is off. A broken guiding pin and you would get that. Or the guiding pin forced into the wrong hole in the sprocket - it's aluminum sprockets from what I understand. It's true but you really can't mess up the exhaust cam sprocket (the dowel pin is exposed so you can easily see if you messed up the install prior to installing the bolt). The intake one OTOH, yes you can mess that up. But OP is aware of it. So I am sure he was extra careful in reinstall it right. And also, it would have to affect cylinder 4 compression results since timing would be off no? Link to comment Share on other sites More sharing options...
ehsnils Posted January 17, 2018 Share Posted January 17, 2018 It's true but you really can't mess up the exhaust cam sprocket. The intake one OTOH, yes you can mess that up. But OP is aware of it. So I am sure he was extra careful in reinstall it right. And also, it would have to affect cylinder 4 compression results since timing would be off no? And at least before the cylinder 4 compression was bad too, so I wouldn't be surprised if it's still bad. Considering the situation I'd definitely take a look there to make sure and rule it out. What's the worst that can happen? And maybe someone has enough to give the angle between timing mark and first cam lobe or something on known correct cams/sprockets? Link to comment Share on other sites More sharing options...
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