Mopar 408 Stroker Burns Oil Again Written By Simonetti Withadentall Thursday, May 12, 2022 Add Comment Edit So my 340 stroker has been burning a lot of oil so I accept tore into the engine to alter the piston rings. Heads have nearly 1000 miles on them. They had new seals and the valves seemed to exist good when I put them together. Heads are w2 Now I took the heads off and I found ane piston to be spotless and the rest with black crap on them. Do I blame the heads, piston rings? Or a dead cylinder all together. Engine ran shine with gobs of power. Trying to be certain I prepare the issue so I don't have to go back into the engine. jimjimjimmy lobsterman FABO Aureate Fellow member Messages: 4,828 Likes Received: 1732 Joined: Nov 2, 2010 Location: p. e. i. Local Time: 12:45 PM whatsoever signs of a caput gasket leaking coolant into that cylinder ? does this engine have gapless rings ? Agree ten 4 Engine has Keith black molly rings (non gapless) 100 miles I would burn at to the lowest degree two-three quarts. At idle it barely noticeable. If I jump on it i get a cloud of fume. Then takes awhile to burn the oil off. No sign of a leaking caput gasket When I took the header off today I had oil drain out of the collector. Tooljunkie Male monarch of cobble/chief of the cleaved bolt FABO Gilt Member Messages: 21,253 Likes Received: 24218 Joined: Jul 22, 2017 Location: Manitoba Local Time: 10:45 AM Oil bleed out of colector on aforementioned side equally shiny piston ? Pull that one for sure,was re assembling a sb chevy and establish i piston had all the oil command rings lined upwardly. So far remainder were fine. Yeah on the same side as shiny piston brian6pac Well-Known Fellow member Messages: 5,668 Likes Received: 4032 Joined: Nov 15, 2016 Location: N.E.Ohio Local Time: 11:45 AM Did you run a compression test before y'all pulled it down? is the oil in all the primary tubes or just i? blowing fume out of both sides or just ane side? moper Well-Known Fellow member Messages: 15,853 Likes Received: 2082 Joined: Dec 27, 2004 Location: eastern CT Local Time: iv:45 PM Looks like the head gasket was leaking. The deck surface looks similar crap. Was it machined during the rebuild? looks like a blown head gasket on that cylinder- cylinder then got fuel washed.. I would put the heads back on- to force per unit area examination (leakage test). earlier pulling the pistons. likewise what does the intake ports in the head expect like > intake sealing >sucking oil Pressure check #one =170 #2= 180 #3 = 165 #4 = 170 #v = 160 #6 = 175 #seven = 160 #eight = 180 Check with oil #1 = 190 #2 = 230 #3 = 185 #four = 240 #five = 190 #6 = 240 #7 = 180 #viii = 210 Deck was surfaced earlier rebuild. Intake did have oil in it on that piston. That cylinder was the worst one. Could not tell which side the smoke came from considering of the x pipe. Dartish Well-Known Member Messages: 652 Likes Received: 357 Joined: Sep 26, 2016 Location: Iowa Local Time: 10:45 AM Looks like you've got some rings that never sealed Dartish Well-Known Fellow member Messages: 652 Likes Received: 357 Joined: Sep 26, 2016 Location: Iowa Local Time: 10:45 AM Did you take a shop gather the engine or merely practise the machining? JBurch FABO Aureate Fellow member FABO Gold Member Messages: 1,976 Likes Received: 1190 Joined: Oct 17, 2009 Location: Owego, NY Local Time: xi:45 AM What little I know......... Jumping on the throttle and getting a deject of fume tells me eather bad valve guide seals on the intake valves, and/or sucking oil from valley side of intake ports from bad/misaligned intake gasket. The one shiny piston says to me water in the bedchamber, that will steam make clean the top of a piston like nobodies concern; that could be alot of your smoke, you lot did not say what color information technology, the smoke, was. Blue oil, white water/coolant. Fuel wash does non make sense to me as why would 1 piston be clean and the others non? They share a mutual plenum. If you haven't drained the oil, does information technology odor like gas? What machine work was washed for the build? Block deck, caput shave, intake face? AJ's got a indicate about what the witness mark on the deck surface from the fire ring, it looks like information technology is being pushed hard towards the valley. A little water in the bedchamber can attain that. I have a pair of head gaskets that are garage fine art that testify to that fact. Become slow and await at every matter, practise not discount any thing, the pieces volition tell the story. Good luck!! Wow. I concur with posters. Gasket impress does non expect good at all. Did you remove other head, besides? Pic of that may be informative. Did you assemble engine? Information technology kinda looks like either one of the sufaces(caput or block, or both) is not flat, or the bolts were not torqued properly. I had exactly that blazon of oil burning when I accidentally overlapped the ends of the expander on an oil ring prepare, instead of butting the ends confronting each other. When you do that, it will suspension off one stop of the expander and at that place volition be no tension on the oil rings. And so that is a possibility to investigate in that one shiney hole in particular. I defenseless it right away (in the first mile!) and replaced the expander in <100 miles from startup, so did non have any oil build upwards to look at. But I agree on the 'steam cleaning' for that shiney piston as a skillful possibility. Another possibility: Bad oil ring set up on that shiney piston; oil gets into cylinder and causes detonation. That would make that fire band move so radically and perhaps scour the piston top. The oil in the other holes could exist from another source like the intake, or blowing support the intake from this one cylinder on overlap. Bank check that shiney piston acme for signs of detonation. Those compression numbers with the oil brand no sense to me. The dry numbers look reasonable for a high dynamic compression engine. JBurch FABO Gold Member FABO Gold Member Messages: 1,976 Likes Received: 1190 Joined: Oct 17, 2009 Location: Owego, NY Local Time: 11:45 AM Another thought comes to mind........any port work done to the heads? Possible to have a pin pigsty in the intake runner/valve basin of the shiny piston. lomchivok Well-Known Member Letters: 234 Likes Received: 43 Joined: April 10, 2016 Location: wa. Local Time: 8:45 AM In my experience when a piston is that make clean its burning water..steam cleaned every bit said in a higher place. The fire ring is a major clue. What does the diameter look like on that cylinder...all cylinders for that matter. My guess is coolant washed the cylinder and removed the oil causing ring failure. Probably at present a philharmonic of steam and smoke out the back from a bad gasket and washed cylinder/warn rings. A snap gauge and hand mike to measure taper from peak of cylinder to top of piston at bdc may reveal another inkling. Tooljunkie King of cobble/master of the broken commodities FABO Golden Member Messages: 21,253 Likes Received: 24218 Joined: Jul 22, 2017 Location: Manitoba Local Time: x:45 AM That clean it would get through water like my wife goes through money.... Tooljunkie Rex of cobble/master of the broken bolt FABO Gold Member Letters: 21,253 Likes Received: 24218 Joined: Jul 22, 2017 Location: Manitoba Local Fourth dimension: 10:45 AM Not to mention information technology would have hydrolocked. Tooljunkie Male monarch of cobble/master of the broken bolt FABO Gilt Fellow member Messages: 21,253 Likes Received: 24218 Joined: Jul 22, 2017 Location: Manitoba Local Time: x:45 AM I beg to differ,that sparkly make clean tells me a considerable amount of something washed that piston. And most head gasket leaks result in overheating and a dead cylinder. Compression test tells us something different. Intake doesent take a coolant passage most that cylinder so i would rule that out. Until piston comes out and we get a look at what is in pan we volition have to continue speculating. Close Carte du jour Home Forums Search Forums Recent Posts Photo Garages How To Articles Members Notable Members Registered Members Current Visitors Recent Activity New Profile Posts Mopar Classifieds Search monizforem1990.blogspot.com Source: https://www.forabodiesonly.com/mopar/threads/burning-oil.386200/ Share this post
So my 340 stroker has been burning a lot of oil so I accept tore into the engine to alter the piston rings. Heads have nearly 1000 miles on them. They had new seals and the valves seemed to exist good when I put them together. Heads are w2 Now I took the heads off and I found ane piston to be spotless and the rest with black crap on them. Do I blame the heads, piston rings? Or a dead cylinder all together. Engine ran shine with gobs of power. Trying to be certain I prepare the issue so I don't have to go back into the engine.
whatsoever signs of a caput gasket leaking coolant into that cylinder ? does this engine have gapless rings ?
Engine has Keith black molly rings (non gapless) 100 miles I would burn at to the lowest degree two-three quarts. At idle it barely noticeable. If I jump on it i get a cloud of fume. Then takes awhile to burn the oil off. No sign of a leaking caput gasket When I took the header off today I had oil drain out of the collector.
Oil bleed out of colector on aforementioned side equally shiny piston ? Pull that one for sure,was re assembling a sb chevy and establish i piston had all the oil command rings lined upwardly. So far remainder were fine.
Did you run a compression test before y'all pulled it down? is the oil in all the primary tubes or just i? blowing fume out of both sides or just ane side?
Looks like the head gasket was leaking. The deck surface looks similar crap. Was it machined during the rebuild?
looks like a blown head gasket on that cylinder- cylinder then got fuel washed.. I would put the heads back on- to force per unit area examination (leakage test). earlier pulling the pistons. likewise what does the intake ports in the head expect like > intake sealing >sucking oil
Pressure check #one =170 #2= 180 #3 = 165 #4 = 170 #v = 160 #6 = 175 #seven = 160 #eight = 180 Check with oil #1 = 190 #2 = 230 #3 = 185 #four = 240 #five = 190 #6 = 240 #7 = 180 #viii = 210 Deck was surfaced earlier rebuild. Intake did have oil in it on that piston. That cylinder was the worst one.
What little I know......... Jumping on the throttle and getting a deject of fume tells me eather bad valve guide seals on the intake valves, and/or sucking oil from valley side of intake ports from bad/misaligned intake gasket. The one shiny piston says to me water in the bedchamber, that will steam make clean the top of a piston like nobodies concern; that could be alot of your smoke, you lot did not say what color information technology, the smoke, was. Blue oil, white water/coolant. Fuel wash does non make sense to me as why would 1 piston be clean and the others non? They share a mutual plenum. If you haven't drained the oil, does information technology odor like gas? What machine work was washed for the build? Block deck, caput shave, intake face? AJ's got a indicate about what the witness mark on the deck surface from the fire ring, it looks like information technology is being pushed hard towards the valley. A little water in the bedchamber can attain that. I have a pair of head gaskets that are garage fine art that testify to that fact. Become slow and await at every matter, practise not discount any thing, the pieces volition tell the story. Good luck!!
Wow. I concur with posters. Gasket impress does non expect good at all. Did you remove other head, besides? Pic of that may be informative. Did you assemble engine? Information technology kinda looks like either one of the sufaces(caput or block, or both) is not flat, or the bolts were not torqued properly.
I had exactly that blazon of oil burning when I accidentally overlapped the ends of the expander on an oil ring prepare, instead of butting the ends confronting each other. When you do that, it will suspension off one stop of the expander and at that place volition be no tension on the oil rings. And so that is a possibility to investigate in that one shiney hole in particular. I defenseless it right away (in the first mile!) and replaced the expander in <100 miles from startup, so did non have any oil build upwards to look at. But I agree on the 'steam cleaning' for that shiney piston as a skillful possibility. Another possibility: Bad oil ring set up on that shiney piston; oil gets into cylinder and causes detonation. That would make that fire band move so radically and perhaps scour the piston top. The oil in the other holes could exist from another source like the intake, or blowing support the intake from this one cylinder on overlap. Bank check that shiney piston acme for signs of detonation. Those compression numbers with the oil brand no sense to me. The dry numbers look reasonable for a high dynamic compression engine.
Another thought comes to mind........any port work done to the heads? Possible to have a pin pigsty in the intake runner/valve basin of the shiny piston.
In my experience when a piston is that make clean its burning water..steam cleaned every bit said in a higher place. The fire ring is a major clue. What does the diameter look like on that cylinder...all cylinders for that matter. My guess is coolant washed the cylinder and removed the oil causing ring failure. Probably at present a philharmonic of steam and smoke out the back from a bad gasket and washed cylinder/warn rings. A snap gauge and hand mike to measure taper from peak of cylinder to top of piston at bdc may reveal another inkling.
I beg to differ,that sparkly make clean tells me a considerable amount of something washed that piston. And most head gasket leaks result in overheating and a dead cylinder. Compression test tells us something different. Intake doesent take a coolant passage most that cylinder so i would rule that out. Until piston comes out and we get a look at what is in pan we volition have to continue speculating.
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