ChallengeDave Posted December 1, 2022 Share Posted December 1, 2022 Hello all! Got an interesting one here on my hands. Have a 95 E7 427 Vmac1 that I did a complete out of frame on about 20k-25k miles ago. Truck has been running great and pulling even better. Driver brought to my attention that he heard a strange noise on the driver side of the motor. So when I put my ear onto the CAC pipe going into the intake, all I could hear was a popping/wooshing sound. Took the pipe off and it was even louder when I fired it back up. First thing i did was cut out each cylinder and found that it would quite up only a little on cylinder number 1 when you killed that injector. Pulled valve covers and checked for valve clearance on number 1, checked everything else out visually while I was in there. everything looked great so far. Pulled the forward intake manifold and confirmed noise was coming from number 1. upon startup, you could see a puff of smoke come from number 1s intake port. So my thought was that I must have had a intake valve problem, so I pulled the cylinder head and wouldn't you know, both valves seem to be seating just fine. No visible damage to the piston, no bent push rods. So now I'm stumped. I'm looking for ideas on what i may have missed, ill take any ideas you guys might have. Thanks! Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/ Share on other sites More sharing options...
fjh Posted December 1, 2022 Share Posted December 1, 2022 Cam failure Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516695 Share on other sites More sharing options...
Joey Mack Posted December 1, 2022 Share Posted December 1, 2022 cam? Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516696 Share on other sites More sharing options...
fjh Posted December 1, 2022 Share Posted December 1, 2022 1 minute ago, Joey Mack said: cam? Yup Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516697 Share on other sites More sharing options...
ChallengeDave Posted December 1, 2022 Author Share Posted December 1, 2022 Well i cant say I looked to closely at the cam. Ill take a look at the lobes now if i can get a good look at them. Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516698 Share on other sites More sharing options...
Joey Mack Posted December 1, 2022 Share Posted December 1, 2022 drop the pan and look up,, try to get your fingers on the lobes to feel them if you can,, Hell, you probably knew that,, I'm sorry.. Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516700 Share on other sites More sharing options...
Onyx610 Posted December 1, 2022 Share Posted December 1, 2022 6 minutes ago, fjh said: Cam failure 4 minutes ago, Joey Mack said: cam? you guys seen this before or something???🤔 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516701 Share on other sites More sharing options...
fjh Posted December 1, 2022 Share Posted December 1, 2022 1 minute ago, ChallengeDave said: Well i cant say I looked to closely at the cam. Ill take a look at the lobes now if i can get a good look at them. Did you inframe it! Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516702 Share on other sites More sharing options...
fjh Posted December 1, 2022 Share Posted December 1, 2022 1 minute ago, Onyx610 said: you guys seen this before or something???🤔 Yup popping on the intake is a classic failure usually on the exhaust! Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516704 Share on other sites More sharing options...
Onyx610 Posted December 1, 2022 Share Posted December 1, 2022 Haha apparently alot Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516706 Share on other sites More sharing options...
Joey Mack Posted December 1, 2022 Share Posted December 1, 2022 the lifters can loose their faces, and , well..... Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516707 Share on other sites More sharing options...
ChallengeDave Posted December 1, 2022 Author Share Posted December 1, 2022 Out of frame, block, cam heads, everything got sent out. just working on turning it over now. I can see them from up top with the head off. Ill keep you just posted. Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516708 Share on other sites More sharing options...
Joey Mack Posted December 1, 2022 Share Posted December 1, 2022 He can cut open an oil filter to see if there is "Silver in them thar Hill's.!!! ".. Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516709 Share on other sites More sharing options...
fjh Posted December 1, 2022 Share Posted December 1, 2022 1 minute ago, ChallengeDave said: Out of frame, block, cam heads, everything got sent out. just working on turning it over now. I can see them from up top with the head off. Ill keep you just posted. Check for a bent push rod also! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516710 Share on other sites More sharing options...
ChallengeDave Posted December 1, 2022 Author Share Posted December 1, 2022 7 minutes ago, fjh said: Check for a bent push rod also! Checked them earlier, they are all straight. Cant see as well as I thought I could from up top. Going to drop the pan in the AM. Going to sleep on this. Thanks everyone! Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516716 Share on other sites More sharing options...
Joey Mack Posted December 1, 2022 Share Posted December 1, 2022 Nite-Nite...... See you tomorrow... Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516718 Share on other sites More sharing options...
fjh Posted December 1, 2022 Share Posted December 1, 2022 8 minutes ago, Joey Mack said: Nite-Nite...... See you tomorrow... yup sleep is good! Just one more thing check the valve set on that cylinder it will be loose on the exhaust if the lifter has failed! Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516724 Share on other sites More sharing options...
Mark T Posted December 2, 2022 Share Posted December 2, 2022 If a face came off a lifter, you'll have a hard time seeing that from the top. Pan needs to come off. Those on occasion come off in only a couple pieces sometimes too big to fit out the drain plug. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516734 Share on other sites More sharing options...
fjh Posted December 2, 2022 Share Posted December 2, 2022 The new style lifters seldom failed but if it came as a whole piece it definitely would not come out the pan plug ! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516747 Share on other sites More sharing options...
Mark T Posted December 2, 2022 Share Posted December 2, 2022 I think there's definitely something in the cam area failed on this guy's engine. Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516762 Share on other sites More sharing options...
Joey Mack Posted December 2, 2022 Share Posted December 2, 2022 in his post he said new cam.. unless I read it wrong, but I didnt see new lifters.. heck, anything could have happened.. How do we know his driver didn't over rev. it, on a downhill run, ? I did fleet management for a long time and I heard so many story's,,,,,,, looking back, my brain would hurt trying to figure out the B.S. ... Yep, another one of my opinion's.. jojo 2 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516768 Share on other sites More sharing options...
Joey Mack Posted December 2, 2022 Share Posted December 2, 2022 I looked back..... He said ALL got sent out... so he may not have been involved in the actual install's.. No offense, just trying to get a better perspective... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516769 Share on other sites More sharing options...
fjh Posted December 2, 2022 Share Posted December 2, 2022 28 minutes ago, Joey Mack said: I looked back..... He said ALL got sent out... so he may not have been involved in the actual install's.. No offense, just trying to get a better perspective... jojo We will see tomorrow Joe I’m sure he will post his findings! If it is the lifter / cam failure it is definitely nothing to do with his rebuild skills! And more on what you mentioned overspeed !There is a remote possibility it’s a valve issue! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516782 Share on other sites More sharing options...
mechohaulic Posted December 2, 2022 Share Posted December 2, 2022 issues like this is one of the main reasons i always cleaned the drain oil pan before removing the pan plug. have had my b-lls broke ;"why you washing out the drain pan"? because it let me know any foreign matter in that pan came from the engine i'm working on. have seen drain pans with so much crud from other stuff. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516788 Share on other sites More sharing options...
Joey Mack Posted December 2, 2022 Share Posted December 2, 2022 I actually use a small kitchen strainer when I am trouble shooting an issue. Gear oil is a bit thick but the pieces fall into the strainer. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70801-cylinder-pressure-out-intake-port/#findComment-516816 Share on other sites More sharing options...
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