Can SomeOne Please Tell Me if this is Common REBUILDING 2005 3.8L IMPALA FROM MISFIRE
September 16th, 2016, 9:56 AM
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Can SomeOne Please Tell Me if this is Common REBUILDING 2005 3.8L IMPALA FROM MISFIRE
I'm still in the Process of Rebuilding My 3800 Impala Engine After having persistent Cyl 5 Misfire, A little history: I Replaced everything relating to the Cyl 5, But to no avail. So when I opened it up, I found Oil on top of the Lower intake Manifold, Seems a common issue with these engines. My Throttle Body To Upper Intake Manifold gasket Looks Warped from the EGR tube Heat (which I suspected is where the coolant Was getting to the Oil from)
My Rockers and Push-Rods have play in them, (the Rocker Arms Slide from side to side, even tho its not very much, But it worries Me, Also, I can Spin Around the Push-Rods with ease especially Cyl #5 Push-Rods), I haven't gotten to the Rear bank Yet, But I'm guessing it'll be the same scenario back there.
I though of Just replacing the Lifters and corresponding Push-Rods that had play in them (as a cheap fix), but I figured that won't be a good idea.
So My question(s) is, are the play that I'm having in those Rockers and Push-Robs a common thing to see in these engines?
If not : (1) what would be a good way to diagnose what My problem is while I have the engine Open?
(2) What extra step/check can I do while I'm inside the engine to See what else I need to perform a good fix? Is it worth it dropping the Oil Pan and Checking the Bearing for any Play too?
And (3) If I don't need anything else, Will Just Replacing ALL Of the Push-Rods and Lifters Fix This Issue For Me?
Thanks.
Link to Youtube Video And Symptoms History :
Play in Rocker Arm Video -
Misfire Video :
knocking Video :
My Rockers and Push-Rods have play in them, (the Rocker Arms Slide from side to side, even tho its not very much, But it worries Me, Also, I can Spin Around the Push-Rods with ease especially Cyl #5 Push-Rods), I haven't gotten to the Rear bank Yet, But I'm guessing it'll be the same scenario back there.
I though of Just replacing the Lifters and corresponding Push-Rods that had play in them (as a cheap fix), but I figured that won't be a good idea.
So My question(s) is, are the play that I'm having in those Rockers and Push-Robs a common thing to see in these engines?
If not : (1) what would be a good way to diagnose what My problem is while I have the engine Open?
(2) What extra step/check can I do while I'm inside the engine to See what else I need to perform a good fix? Is it worth it dropping the Oil Pan and Checking the Bearing for any Play too?
And (3) If I don't need anything else, Will Just Replacing ALL Of the Push-Rods and Lifters Fix This Issue For Me?
Thanks.
Link to Youtube Video And Symptoms History :
June 21st, 2017, 3:11 PM
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Following Up, U/LIM Gaskets Installed, Car Still Won't Start...
I Tried That But I didn't succeed..
But, I'm trying to get help as to why the car will crank but not start? Just like it did before I started working on it.. Everything seems to be working right. Any suggestions?
Only thing I Can think of is the Oil Pressure Unit, I'm gonna Change that and See what Happens, But Please give Me advices.
Thanks.
But, I'm trying to get help as to why the car will crank but not start? Just like it did before I started working on it.. Everything seems to be working right. Any suggestions?
Only thing I Can think of is the Oil Pressure Unit, I'm gonna Change that and See what Happens, But Please give Me advices.
Thanks.
Last edited by Impala-Ryder; June 21st, 2017 at 3:17 PM.
June 21st, 2017, 8:16 PM
#5
sorry did not read thru all that...the rockers have to be on the base of the cam when torqued.
all the rockers with movement....does it occur on every rocker that is on the base of the cam lobe and all the others that do not have spring tension on them from the lobe of the cam.
all the rockers with movement....does it occur on every rocker that is on the base of the cam lobe and all the others that do not have spring tension on them from the lobe of the cam.
June 22nd, 2017, 7:28 AM
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Main Mission is to Get the Car Started.
sorry did not read thru all that...the rockers have to be on the base of the cam when torqued.
all the rockers with movement....does it occur on every rocker that is on the base of the cam lobe and all the others that do not have spring tension on them from the lobe of the cam.
all the rockers with movement....does it occur on every rocker that is on the base of the cam lobe and all the others that do not have spring tension on them from the lobe of the cam.
But, that's not My worry now, My main Interest and concern right now is to get the car started, even if the Misfire Returns. I have fuel and I Have spark, what Else am I Missing?
June 23rd, 2017, 6:25 AM
#7
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I had a similar issue (crank but no start) when I replaced the head gaskets on my '05 3.4L Impala. There was one connector that I missed because it fell down behind the engine. Happened to look under the car and saw the connector hanging down. So, re-check that ALL the connectors are where they belong.
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June 23rd, 2017, 6:38 PM
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I Was Wrong, The Real Issue is No Spark. That's why It Won't Start..
I had a similar issue (crank but no start) when I replaced the head gaskets on my '05 3.4L Impala. There was one connector that I missed because it fell down behind the engine. Happened to look under the car and saw the connector hanging down. So, re-check that ALL the connectors are where they belong.
But, this Crank and No start Problem started even before I did the Upper and Lower Intake Gaskets. So Yesterday I did the ICM and Crankshaft Position Sensor Diagnosis with Multimeter, It came back as Faulty ICM and Crank, I didn't see 12 Volts on the ICM or 0-6Volts on The Crankshaft Position Sensor as the test suggested. So, I figured that's what was the cause of No spark. So, today I went and bought and installed brand new ICM and Crank Position Sensor and guess what? Wait For It, THERE WAS STILL NO SPARK!!! So at this point in Mad Pissed, Frustrated, Tired and Just about as irritated as I can be, I've been working on this car since Monday and out in the sun all day (although enjoyed the sun a little bit). I had someone crank the Engine while I had the Spark Plug wire coming from the Coil pack (Checked each Coil pack one at a time for spark,. NONE) in My hand, The Spark Plugs didn't even Fire for half a second. I even did the Screw driver style test and Grounded to the car Just to see if I get a spark, Still Nada. So, now I'm thinking My ICM and Crank Position Sensor are not bad after all, There must be another underlying Cause that is not showing itself. But, I Just gave up cos I don't know what else to do.
Last edited by Impala-Ryder; June 23rd, 2017 at 6:42 PM. Reason: Addition
June 23rd, 2017, 9:07 PM
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What else could Cause A No Spark Situation.. ?
But, all the fuses and relay are fine, I Checked them again today. Besides what would Ignition Relay have to do with Spark? I thought that would be for the Ignition and Key, if IGN RLY is Faulty the car wouldn't even crank at all, Isn't it?
But, I won't over look anything anyway, I'll swap out that IGN RLY with another spare that I have and see if that'll do it.
But, I don't know what this "DFI MDL", I don't think I've seen any Fuse by that denotation, Keep in Mind that this is a 05' Impala Base with 3800 Engine.. Where would this DFI MDL Fuse be found?
Last edited by Impala-Ryder; June 23rd, 2017 at 9:10 PM.