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Is there one cylinder that burns valves more often?; Have seen two cars with bad cylinder 3.
Topic Started: Aug 21 2012, 06:21 PM (1,137 Views)
cwatkin


I was wondering if any cylinders seem to burn valves more than others. I own an engine with a dead cylinder 3 and looked at a car today with 60 psi on cylinder 3. I was wondering if this is a common thing or not. Are there any cylinders that tend to go before the others?

Conor
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00Metro
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Rumor has it that the plugged EGR port burns #3 cyl.
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Norby
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I've owned 3 Metro's. Each one had a different set of burnt valves. I see no rhyme or reason to it. But, at least they all had great cylinder walls and good looking piston rings.
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starscream5000
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Got 70 MPG?

I've seen no trend towards one particular valve burning more than others.
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Johnny Mullet
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Fear the Mullet

I have seen #3 on more than 50% of the dirty rebuilds I have done, but usually the other 2 are not far behind.
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cwatkin


Interesting. I guess the EGR plays a role in this some of the time. Anyway, the guy at the junkyard didn't believe that the engine was going bad and wanted me to buy a non running car for $700 but wouldn't come look at the results himself. The oil in it was simply coal tar black so this probably played a role too.

Conor
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idmetro
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I agree with Johnny that #3 seems to be most common but only just ahead of the others. I have become a bit of a convert to better grade oil (Search for MWebb postings on the topic) as my current rebuild has gone 50K, the EGR passages are still functioning fine and the valvetrain is clean. The engines I've seen with burned valves typically have signifcant carbon buildup in the cylinders and it is visible in the valvetrain area, better oil and regular maintenance is your friend for engine longevity.
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cwatkin


Yeah, I would agree with that. I am obsessive about oil changes and can tell that the engine that came in my car hadn't been well maintained. I think it might have gone 20-30k without an oil change from what I was told by the previous owner. The donor engine wasn't cared for the best but it seems to be running strong after a few repairs/replacements on seals, the PCV, etc. as well as a good cleaning from the inside with oil additives. I was intermittently blowing out massive oil farts under load and the MMO and Seafoam treatment seems to have worked something loose. Although that oil only had like 300 miles on it, it looked like it was overdue for a change after this treatment.

I am going to be looking into the European spec oil for my next change. I am using Castrol Edge (gold bottle) which is supposed to be a good synthetic for the time being. I have run this in other vehicles and small engines with good luck.

My engine seems to be running stronger after getting rid of all the crud. I am sure more will continue to be flushed by the oil changes but I think I got most of it.

Conor
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aryaan
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[ *  *  * ]
its common fault in g10 engines...and there is also exaust manifold hard surface problem in these engines which screw ur engine head...i wanna get rid of this piece of shit
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starscream5000
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Got 70 MPG?

aryaan
Aug 22 2012, 11:58 AM
and there is also exaust manifold hard surface problem in these engines which screw ur engine head...i wanna get rid of this piece of shit
...What? :hmm
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aryaan
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[ *  *  * ]
G10
engine blows head gaskets. This fault
is due to the exhaust manifold having
solid chunks of casting not cut off
from the head mounting flange. the
manifold being iron tries to expand
the head as it acts like a solid bar at
the mounting flange.you can chec it by opening manifold and see inside
Edited by aryaan, Aug 22 2012, 02:15 PM.
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starscream5000
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Got 70 MPG?

Where did you ever come up with this theory?
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aryaan
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its not my theory but an expert machanic theory.....
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Coche Blanco
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Troll Certified

Oh....
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1DCGUY
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Don't be a "Richard"

aryaan
Aug 22 2012, 09:27 PM
its not my theory but an expert machanic theory.....
Ok, I'll ask.

Are you the "expert" mechanic??

:popcorn :popcorn
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