Hi,
I'm wanting some advice on what directions to look in when repairing my motor. I think I will be pulling the heads anyway, they're very weepy and it could be just a head gasket failure, but I don't know, and any advice would be appreciated.
I've never had any problems like this, internally with the motor, and the symptoms are confusing me.
hopefully someone has had some similar issues or just some ideas to help figurin' just what's goin on here..
It's been goin' on about 4 weeks, started by sounding like an exhaust leak, with one extra pop out of the exhaust and a steady, annoying misfire. It got a little worse and I started noticing a pop also from the intake, when I lift the air cleaner lid 1/8 of an inch, it sucks it down and pushes it back up with the rythim of the engine. I can feel the air chuffing back out of the intake manifold.
It's getting too bad to drive now, but I have horded supplies the last few weeks and a little money, so I am taking this time to fix it. Going to tear her down and get to the bottom of it before something breaks.
I thought it was the head gaskets, they are certainly leaking alot, but then again they have been for along time. so I'm not really sure at all. It's 'chuffing' or 'popping' out of BOTH the intake and the exhaust. like an exhaust leak out of both sides. so I was thinking maybe a break in the gasket between 2 cylinders causing the cylinder pressure to escape to the neighboring cylinder when it was in the intake valve open stage.
but I have no Idea, could it be a bent intake valve, a lifter, would it pop out of one or the other and not both?
I'm trying to narrow things down what this is as much as I can. I took off the valve covers and run it, all the rockers and springs APPEAR to be okay.
I didn't hear any chuffing back up at the springs. everything looked okay visually.
Is a bad lifter capable of doing something like this? I know each set of rockers is tied together, but could one bad lifter affect the sister valve like that.
the sound is pretty much impossible to pinpoint, it seems to be coming from inside the motor, but reflecting out through the exhaust and intake.
Probably not, IDK at all, could this be a very strange injection pump issue? I doubt it just thinking out all the possibilities, it's not smoking or stalling like l'd expect from a typical IP problem, but has anyone experienced symptoms like that.
I have my old IP, it ran, smoke and stuttered, but it ran, and didn't cause any chuffing or knock. so I think I'll put it back on first to make sure it is still misbehaving in the same manner, so that at least I'll know that it's in the motor and not a fuel delivery problem.
loosening individual injectors yeilded no noticeable difference in running.
Probably a busted HG, I guess I'll probably be able to find visual indicators of what's wrong when I pull the heads.
another clue though, day before yesterday, after stopping about 10 minutes, at startup, it ran about 5 seconds, then COUGH run run run COUGH, like someone stuck a 2x4 in the cylinder, hard feelable miss, then it started knocking, like a bottom end knock.
I shut it down, expecting disaster, said a little prayer, fired it up and she was doing fine again. what could cause a knock knock knock like that?
It has been doing this last few startups, usually just in the mornings and not as bad, but it feels like half the motor is 'catching' or firing, then after a few seconds it finds it's pace and runs with all cylinders minus the misfire and shake.
I've never had to open her up beside external engine repair, this doesn't look like a fun job getting the heads off with as little room as there seems to be in the engine bay. I will be reusing the head bolts and valley pan gasket, I know.. got some permatex aviation form a gasket, is that the best for this job or would for some reason rtv be better in this situation.
no overheating or smoke, yes to much oil seeping.
if/ when I pull the heads is coolant going to dump down into the engine if I don't drain the radiator some?
Should I drain and keep the oil and coolant separately, as they're recently changed and still good, except for a little oily in the coolant, but not so bad, i'd like to keep the fluids, and will drain them if head removal causes cross contamination.
advice, tips tricks and recommendations wanted and appreciated, thanks . Leroy
I'm wanting some advice on what directions to look in when repairing my motor. I think I will be pulling the heads anyway, they're very weepy and it could be just a head gasket failure, but I don't know, and any advice would be appreciated.
I've never had any problems like this, internally with the motor, and the symptoms are confusing me.
hopefully someone has had some similar issues or just some ideas to help figurin' just what's goin on here..
It's been goin' on about 4 weeks, started by sounding like an exhaust leak, with one extra pop out of the exhaust and a steady, annoying misfire. It got a little worse and I started noticing a pop also from the intake, when I lift the air cleaner lid 1/8 of an inch, it sucks it down and pushes it back up with the rythim of the engine. I can feel the air chuffing back out of the intake manifold.
It's getting too bad to drive now, but I have horded supplies the last few weeks and a little money, so I am taking this time to fix it. Going to tear her down and get to the bottom of it before something breaks.
I thought it was the head gaskets, they are certainly leaking alot, but then again they have been for along time. so I'm not really sure at all. It's 'chuffing' or 'popping' out of BOTH the intake and the exhaust. like an exhaust leak out of both sides. so I was thinking maybe a break in the gasket between 2 cylinders causing the cylinder pressure to escape to the neighboring cylinder when it was in the intake valve open stage.
but I have no Idea, could it be a bent intake valve, a lifter, would it pop out of one or the other and not both?
I'm trying to narrow things down what this is as much as I can. I took off the valve covers and run it, all the rockers and springs APPEAR to be okay.
I didn't hear any chuffing back up at the springs. everything looked okay visually.
Is a bad lifter capable of doing something like this? I know each set of rockers is tied together, but could one bad lifter affect the sister valve like that.
the sound is pretty much impossible to pinpoint, it seems to be coming from inside the motor, but reflecting out through the exhaust and intake.
Probably not, IDK at all, could this be a very strange injection pump issue? I doubt it just thinking out all the possibilities, it's not smoking or stalling like l'd expect from a typical IP problem, but has anyone experienced symptoms like that.
I have my old IP, it ran, smoke and stuttered, but it ran, and didn't cause any chuffing or knock. so I think I'll put it back on first to make sure it is still misbehaving in the same manner, so that at least I'll know that it's in the motor and not a fuel delivery problem.
loosening individual injectors yeilded no noticeable difference in running.
Probably a busted HG, I guess I'll probably be able to find visual indicators of what's wrong when I pull the heads.
another clue though, day before yesterday, after stopping about 10 minutes, at startup, it ran about 5 seconds, then COUGH run run run COUGH, like someone stuck a 2x4 in the cylinder, hard feelable miss, then it started knocking, like a bottom end knock.
I shut it down, expecting disaster, said a little prayer, fired it up and she was doing fine again. what could cause a knock knock knock like that?
It has been doing this last few startups, usually just in the mornings and not as bad, but it feels like half the motor is 'catching' or firing, then after a few seconds it finds it's pace and runs with all cylinders minus the misfire and shake.
I've never had to open her up beside external engine repair, this doesn't look like a fun job getting the heads off with as little room as there seems to be in the engine bay. I will be reusing the head bolts and valley pan gasket, I know.. got some permatex aviation form a gasket, is that the best for this job or would for some reason rtv be better in this situation.
no overheating or smoke, yes to much oil seeping.
if/ when I pull the heads is coolant going to dump down into the engine if I don't drain the radiator some?
Should I drain and keep the oil and coolant separately, as they're recently changed and still good, except for a little oily in the coolant, but not so bad, i'd like to keep the fluids, and will drain them if head removal causes cross contamination.
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advice, tips tricks and recommendations wanted and appreciated, thanks . Leroy