Excessive Oil out blow by tube
02-23-2004, 01:18 AM
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Excessive Oil out blow by tube
While changing my lift pump out this past Monday I noticed that I have more than a ideal amount of oil dripping out of my blow by tube. Then my mother asks me about the several black spots in the gravel driveway today so I'm begining to wonder if something is wrong with my truck. The past couple of oil changes I've noticed my truck is using quite a bit of oil between changes. Also the front of my engine around the oil filler tube and below are really messy is there a gasket between the tube and timing case?
Also my stablizer shock gets oil covered very quickly if I hose it off so where should I look for leaks? Timing case? ???
The truck has 190K on it, what do you guys think the problem could be? I did a search and didn't come up with a whole lot.
Also my stablizer shock gets oil covered very quickly if I hose it off so where should I look for leaks? Timing case? ???
The truck has 190K on it, what do you guys think the problem could be? I did a search and didn't come up with a whole lot.
02-23-2004, 09:42 AM
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Hey mark when you come up here next we can take a look..
Did you have your valves checked lately?
when you did your gsk did you make sure the seal on the pump cover where you access the spring did not come off? mine did and it leaked very little but aeverything was covered and you could always find a little oil on the ground.
DM01
Did you have your valves checked lately?
when you did your gsk did you make sure the seal on the pump cover where you access the spring did not come off? mine did and it leaked very little but aeverything was covered and you could always find a little oil on the ground.
DM01
02-24-2004, 08:28 PM
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oil carryover in blowby tube gases
Oil carryover in blowby gases from the crankcase breather are nothing new for the B and ISB. Check out this website for a solution. http://www.fleetguard.com/fleet/pdfs...es/LT32549.pdf
The topic came up in the 3rd Generation forum. Somebody is selling home made oil catch containers like used in race cars. Not really a solution just an expensive bandaid.
The topic came up in the 3rd Generation forum. Somebody is selling home made oil catch containers like used in race cars. Not really a solution just an expensive bandaid.
02-25-2004, 08:48 PM
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I have the same leak. It scared the crap out of me when we did the KDP! PLEASE tell me you have your KDP taken care of! I will be watching this thread carefully, let me know if your find it.
02-25-2004, 09:15 PM
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Yes KDP has been taken care, probably almost 2 years ago now.
However after spending some quailty time with my truck, a pressure washer, and a bottle of simple green today I noticed a dampness behind the belt tensioner that is removed with Jig'n a KDP.
Not really much oil dripping on the front, but I included it anyways since I was asking the question already. My main concern is the excessive oil out the blow by tube.
However after spending some quailty time with my truck, a pressure washer, and a bottle of simple green today I noticed a dampness behind the belt tensioner that is removed with Jig'n a KDP.
Not really much oil dripping on the front, but I included it anyways since I was asking the question already. My main concern is the excessive oil out the blow by tube.
02-26-2004, 03:06 PM
#6
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Mark:
Heh, how are you doing??
It sounds to me like your 12 valve is about ready for a
rebuild!!
I don't know if you know or not, but my 96'
is up at Scheid going through a rebuild right now! The
engine didn't fail or anything, but I was getting alot of
blow-by (much like you describe) and the engine was
beginning to use a little oil. I would suggest having a
compression check done on the engine. As I recall, the
readings should be around "400". My engine has a little
over 230,000 miles on it.
Scheid tore my engine down and surprisingly it looked
very good inside in spite of the fact of how hard I have
run that thing!!! You know how hard I ran it too!!!
They will not have to bore the block at all which is good
as the 12 valve blocks only have two bores after stock.
Anyway, good luck and take care.
----------
John_P
Heh, how are you doing??
It sounds to me like your 12 valve is about ready for a
rebuild!!
I don't know if you know or not, but my 96'is up at Scheid going through a rebuild right now! The
engine didn't fail or anything, but I was getting alot of
blow-by (much like you describe) and the engine was
beginning to use a little oil. I would suggest having a
compression check done on the engine. As I recall, the
readings should be around "400". My engine has a little
over 230,000 miles on it.
Scheid tore my engine down and surprisingly it looked
very good inside in spite of the fact of how hard I have
run that thing!!! You know how hard I ran it too!!!
They will not have to bore the block at all which is good
as the 12 valve blocks only have two bores after stock.
Anyway, good luck and take care.
----------
John_P
02-27-2004, 01:03 AM
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Don't tell me that John! I may have over estimated my blow by because I was telling a guy the other day about the situation as well as showing him my Scotty II and I grabbed the dipstick and said "watch this, I'll almost bet money its low!" oil level was perfectly fine, and the truck had been sitting for like 10 to 15 minutes while I had been eating my lunch. Go figure.
I am going to continue to monitor it very closely and see what's going on. As I noted I detected a damp area behind my belt tensioner, and at my oil fill tube after a pressure wash the other day so we will see.
I may have over estimated my blow by because I was telling a guy the other day about the situation as well as showing him my Scotty II and I grabbed the dipstick and said "watch this, I'll almost bet money its low!" oil level was perfectly fine, and the truck had been sitting for like 10 to 15 minutes while I had been eating my lunch. Go figure.I am going to continue to monitor it very closely and see what's going on. As I noted I detected a damp area behind my belt tensioner, and at my oil fill tube after a pressure wash the other day so we will see.
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02-27-2004, 06:35 PM
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Originally posted by John_P
Mark:
Heh, how are you doing??
It sounds to me like your 12 valve is about ready for a
rebuild!! I don't know if you know or not, but my 96'
is up at Scheid going through a rebuild right now! The
engine didn't fail or anything, but I was getting alot of
blow-by (much like you describe) and the engine was
beginning to use a little oil. I would suggest having a
compression check done on the engine. As I recall, the
readings should be around "400". My engine has a little
over 230,000 miles on it.
Scheid tore my engine down and surprisingly it looked
very good inside in spite of the fact of how hard I have
run that thing!!! You know how hard I ran it too!!!
They will not have to bore the block at all which is good
as the 12 valve blocks only have two bores after stock.
Anyway, good luck and take care.
----------
John_P
Mark:
Heh, how are you doing??
It sounds to me like your 12 valve is about ready for a
rebuild!!
I don't know if you know or not, but my 96'is up at Scheid going through a rebuild right now! The
engine didn't fail or anything, but I was getting alot of
blow-by (much like you describe) and the engine was
beginning to use a little oil. I would suggest having a
compression check done on the engine. As I recall, the
readings should be around "400". My engine has a little
over 230,000 miles on it.
Scheid tore my engine down and surprisingly it looked
very good inside in spite of the fact of how hard I have
run that thing!!! You know how hard I ran it too!!!
They will not have to bore the block at all which is good
as the 12 valve blocks only have two bores after stock.
Anyway, good luck and take care.
----------
John_P
what'd the rings just wear down from excessive fuel or how did you get excessive blowby?
btw, as i have found out, playing with the plate too much wears out the AFC gasket pretty quickly, hence i'm chansing oil leaks myself
02-28-2004, 06:36 AM
#10
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98rammer:
Our guess is that the wear was most likely caused by
the excess heat (high EGT's). Even without this, "normal"
wear on "stock" engines with real high mileage also see
the eventual diesel "blow-by" and sometimes oil use.
---------
John_P
Our guess is that the wear was most likely caused by
the excess heat (high EGT's). Even without this, "normal"
wear on "stock" engines with real high mileage also see
the eventual diesel "blow-by" and sometimes oil use.
---------
John_P
02-28-2004, 07:35 AM
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Re: Excessive Oil out blow by tube
Originally posted by Got Smoke?
While changing my lift pump out this past Monday I noticed that I have more than a ideal amount of oil dripping out of my blow by tube. Then my mother asks me about the several black spots in the gravel driveway today so I'm begining to wonder if something is wrong with my truck. The past couple of oil changes I've noticed my truck is using quite a bit of oil between changes. Also the front of my engine around the oil filler tube and below are really messy is there a gasket between the tube and timing case?
Also my stablizer shock gets oil covered very quickly if I hose it off so where should I look for leaks? Timing case? ???
The truck has 190K on it, what do you guys think the problem could be? I did a search and didn't come up with a whole lot.
While changing my lift pump out this past Monday I noticed that I have more than a ideal amount of oil dripping out of my blow by tube. Then my mother asks me about the several black spots in the gravel driveway today so I'm begining to wonder if something is wrong with my truck. The past couple of oil changes I've noticed my truck is using quite a bit of oil between changes. Also the front of my engine around the oil filler tube and below are really messy is there a gasket between the tube and timing case?
Also my stablizer shock gets oil covered very quickly if I hose it off so where should I look for leaks? Timing case? ???
The truck has 190K on it, what do you guys think the problem could be? I did a search and didn't come up with a whole lot.
I left a conversion chart for you over on NWBombers. You can use it to determine if your blowby is high, or whether you simply have too much carry-over of liquid oil, a common complaint with "B"s. Also, I have an adapter and cylinder leakage tester to fit a B. You are welcome to use it. In all my checking for oil consumption problems over the yeaRS,
02-28-2004, 07:36 AM
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Re: Excessive Oil out blow by tube
Originally posted by Got Smoke?
While changing my lift pump out this past Monday I noticed that I have more than a ideal amount of oil dripping out of my blow by tube. Then my mother asks me about the several black spots in the gravel driveway today so I'm begining to wonder if something is wrong with my truck. The past couple of oil changes I've noticed my truck is using quite a bit of oil between changes. Also the front of my engine around the oil filler tube and below are really messy is there a gasket between the tube and timing case?
Also my stablizer shock gets oil covered very quickly if I hose it off so where should I look for leaks? Timing case? ???
The truck has 190K on it, what do you guys think the problem could be? I did a search and didn't come up with a whole lot.
While changing my lift pump out this past Monday I noticed that I have more than a ideal amount of oil dripping out of my blow by tube. Then my mother asks me about the several black spots in the gravel driveway today so I'm begining to wonder if something is wrong with my truck. The past couple of oil changes I've noticed my truck is using quite a bit of oil between changes. Also the front of my engine around the oil filler tube and below are really messy is there a gasket between the tube and timing case?
Also my stablizer shock gets oil covered very quickly if I hose it off so where should I look for leaks? Timing case? ???
The truck has 190K on it, what do you guys think the problem could be? I did a search and didn't come up with a whole lot.
I left a conversion chart for you over on NWBombers. You can use it to determine if your blowby is high, or whether you simply have too much carry-over of liquid oil, a common complaint with "B"s. Also, I have an adapter and cylinder leakage tester to fit a B. You are welcome to use it. In all my checking for oil consumption problems over the years, I have found the cylinder leakage test superior to a compression test. PM me if you need more info/help.
02-28-2004, 09:33 AM
#13
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While you are at it, take a good look at the front seal. Also bad seals in the vacuum pump will cause blowby. I would not tear down the engine for blowby unless there is really a lot.
03-01-2004, 11:31 AM
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Well, I am probably going to invite some abuse but I must state that excessive blowby, if that is documented by Cummins dealer, means that the rings and cylinder walls are worn. Your Cummins dealer service shop can measure blow by gas volume with a test instrument. The abuse comes in when I state that to hasten bore and ring wear you put on those high flow air cleaners in place of the standard paper filters. While the high flow AFs do pass much more air, providing you have increased fueling requiring the air, you are passing more dust since the high flow AFs do so at the expense of cleaner air of the lower flow paper elements. All engines will experience bore and ring wear from injested dust, eventually. With standard paper media filters changed at restriction indicator recommendations will yield the longest bore life (overhaul period). Use of low restriction, high flow air filters will stop less dust with increased wear RATE on the bores.
03-03-2004, 03:03 PM
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OOOhhhh, I hate to talk about this. I changed a head gasket at 135K because of "excessive" blowby. Actually smelled oil in the cab at 60MPH with the windows down. To make a long story short, after replacing a perfectly good head gasket I still saw lots of smoke/vapor coming from the draft tube and even out of the filler neck when I opened it. 
After stumbling across a post about this, I changed from Rosmella T to Delo 400. Smoke/vapor cut in half. Still getting IMO too much blowby, but the engine doesn't use much oil, doesn't drip in the driveway. Might have to check into that vacuum pump seal thing.....
What kind of oil are YOU using?
After stumbling across a post about this, I changed from Rosmella T to Delo 400. Smoke/vapor cut in half. Still getting IMO too much blowby, but the engine doesn't use much oil, doesn't drip in the driveway. Might have to check into that vacuum pump seal thing.....
What kind of oil are YOU using?