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oil use in early C4?
Hello all:
I've got an '85 with almost 200K on it, supposedly has a rebuilt engine, compressions are all 145 - 155. I burn a quart every 400 to 500 miles. I suspect the valve oil seals are shot, as this seems to be a common ailment for the L-98. Comments? Thanks, -- Bob Courtemanche Please reply to the newsgroup To email me, remove the "ABC" from my email address. ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! >100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- |
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#2
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On Wed, 24 Nov 2004 21:26:36 -0800, Bob Courtemanche
> wrote: >Hello all: > >I've got an '85 with almost 200K on it, supposedly has a rebuilt engine, >compressions are all 145 - 155. I burn a quart every 400 to 500 miles. I >suspect the valve oil seals are shot, as this seems to be a common >ailment for the L-98. Comments? > >Thanks, I highly doubt that bad seals would cause oil consumption anywhere near what you are experiencing... I just last week purchased two sets of valve seals for 2 of my Corvettes which need them... My 76 blows smoke on start up big time... yet I never loose more then 1/3 of a quart between oil changes...(2-3000 miles) ... I would suspect that you have at least one oil ring that is cracked or not shot... your compression rings may still be ok.. I am NOT a certified GM Mechanic ... lol... but that is my "guess" Bob Griffiths |
#3
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On Wed, 24 Nov 2004 21:26:36 -0800, Bob Courtemanche
> wrote: >Hello all: > >I've got an '85 with almost 200K on it, supposedly has a rebuilt engine, >compressions are all 145 - 155. I burn a quart every 400 to 500 miles. I >suspect the valve oil seals are shot, as this seems to be a common >ailment for the L-98. Comments? > >Thanks, I highly doubt that bad seals would cause oil consumption anywhere near what you are experiencing... I just last week purchased two sets of valve seals for 2 of my Corvettes which need them... My 76 blows smoke on start up big time... yet I never loose more then 1/3 of a quart between oil changes...(2-3000 miles) ... I would suspect that you have at least one oil ring that is cracked or not shot... your compression rings may still be ok.. I am NOT a certified GM Mechanic ... lol... but that is my "guess" Bob Griffiths |
#4
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Bob G. wrote:
> On Wed, 24 Nov 2004 21:26:36 -0800, Bob Courtemanche > > wrote: > > >>Hello all: >> >>I've got an '85 with almost 200K on it, supposedly has a rebuilt engine, >>compressions are all 145 - 155. I burn a quart every 400 to 500 miles. I >>suspect the valve oil seals are shot, as this seems to be a common >>ailment for the L-98. Comments? >> >>Thanks, > > > I highly doubt that bad seals would cause oil consumption anywhere > near what you are experiencing... I just last week purchased two sets > of valve seals for 2 of my Corvettes which need them... My 76 blows > smoke on start up big time... yet I never loose more then 1/3 of a > quart between oil changes...(2-3000 miles) ... > > I would suspect that you have at least one oil ring that is cracked or > not shot... your compression rings may still be ok.. > > I am NOT a certified GM Mechanic ... lol... but that is my "guess" > > Bob Griffiths There was an L98 service bulletin regarding valve seal problems but it related to static leakage that caused a white wisp in the exhaust for 3 or 4 seconds after the car has been sitting for several days. I'm with Bob, look elsewhere at first. Once upon a time I had an engine rebuild and the shop delivered it with the wrong dipstick. Oil consumption was horid and the myechanic kept saying to wait until the rings settled in. A couple of thousand miles and several quarts of oil later, a sharp-eyed grease monkey in the corner gas station noted that it was taking an extra quart to fill the crankcase. Mike. |
#5
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Bob G. wrote:
> On Wed, 24 Nov 2004 21:26:36 -0800, Bob Courtemanche > > wrote: > > >>Hello all: >> >>I've got an '85 with almost 200K on it, supposedly has a rebuilt engine, >>compressions are all 145 - 155. I burn a quart every 400 to 500 miles. I >>suspect the valve oil seals are shot, as this seems to be a common >>ailment for the L-98. Comments? >> >>Thanks, > > > I highly doubt that bad seals would cause oil consumption anywhere > near what you are experiencing... I just last week purchased two sets > of valve seals for 2 of my Corvettes which need them... My 76 blows > smoke on start up big time... yet I never loose more then 1/3 of a > quart between oil changes...(2-3000 miles) ... > > I would suspect that you have at least one oil ring that is cracked or > not shot... your compression rings may still be ok.. > > I am NOT a certified GM Mechanic ... lol... but that is my "guess" > > Bob Griffiths There was an L98 service bulletin regarding valve seal problems but it related to static leakage that caused a white wisp in the exhaust for 3 or 4 seconds after the car has been sitting for several days. I'm with Bob, look elsewhere at first. Once upon a time I had an engine rebuild and the shop delivered it with the wrong dipstick. Oil consumption was horid and the myechanic kept saying to wait until the rings settled in. A couple of thousand miles and several quarts of oil later, a sharp-eyed grease monkey in the corner gas station noted that it was taking an extra quart to fill the crankcase. Mike. |
#6
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Plug check would confirm a cracked oil ring.
Mike Ellison wrote: > Bob G. wrote: > >> On Wed, 24 Nov 2004 21:26:36 -0800, Bob Courtemanche >> > wrote: >> >> >>> Hello all: >>> >>> I've got an '85 with almost 200K on it, supposedly has a rebuilt >>> engine, compressions are all 145 - 155. I burn a quart every 400 to >>> 500 miles. I suspect the valve oil seals are shot, as this seems to >>> be a common ailment for the L-98. Comments? >>> >>> Thanks, >> >> >> >> I highly doubt that bad seals would cause oil consumption anywhere >> near what you are experiencing... I just last week purchased two sets >> of valve seals for 2 of my Corvettes which need them... My 76 blows >> smoke on start up big time... yet I never loose more then 1/3 of a >> quart between oil changes...(2-3000 miles) ... >> >> I would suspect that you have at least one oil ring that is cracked or >> not shot... your compression rings may still be ok.. >> I am NOT a certified GM Mechanic ... lol... but that is my "guess" >> >> Bob Griffiths > > > > There was an L98 service bulletin regarding valve seal problems but it > related to static leakage that caused a white wisp in the exhaust for 3 > or 4 seconds after the car has been sitting for several days. I'm with > Bob, look elsewhere at first. > > Once upon a time I had an engine rebuild and the shop delivered it with > the wrong dipstick. Oil consumption was horid and the myechanic kept > saying to wait until the rings settled in. A couple of thousand miles > and several quarts of oil later, a sharp-eyed grease monkey in the > corner gas station noted that it was taking an extra quart to fill the > crankcase. > > Mike. > |
#7
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Plug check would confirm a cracked oil ring.
Mike Ellison wrote: > Bob G. wrote: > >> On Wed, 24 Nov 2004 21:26:36 -0800, Bob Courtemanche >> > wrote: >> >> >>> Hello all: >>> >>> I've got an '85 with almost 200K on it, supposedly has a rebuilt >>> engine, compressions are all 145 - 155. I burn a quart every 400 to >>> 500 miles. I suspect the valve oil seals are shot, as this seems to >>> be a common ailment for the L-98. Comments? >>> >>> Thanks, >> >> >> >> I highly doubt that bad seals would cause oil consumption anywhere >> near what you are experiencing... I just last week purchased two sets >> of valve seals for 2 of my Corvettes which need them... My 76 blows >> smoke on start up big time... yet I never loose more then 1/3 of a >> quart between oil changes...(2-3000 miles) ... >> >> I would suspect that you have at least one oil ring that is cracked or >> not shot... your compression rings may still be ok.. >> I am NOT a certified GM Mechanic ... lol... but that is my "guess" >> >> Bob Griffiths > > > > There was an L98 service bulletin regarding valve seal problems but it > related to static leakage that caused a white wisp in the exhaust for 3 > or 4 seconds after the car has been sitting for several days. I'm with > Bob, look elsewhere at first. > > Once upon a time I had an engine rebuild and the shop delivered it with > the wrong dipstick. Oil consumption was horid and the myechanic kept > saying to wait until the rings settled in. A couple of thousand miles > and several quarts of oil later, a sharp-eyed grease monkey in the > corner gas station noted that it was taking an extra quart to fill the > crankcase. > > Mike. > |
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