Looking to buy a GS and have some questions
11-26-2016, 03:58 PM
#1
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Looking to buy a GS and have some questions
Hello all. I'm looking to buy my first Corvette and have some questions. I'm looking at 2010 to 2013 Grand Sports. I just went and test drove one and three things caught my attention.
1. At idle at a stoplight with engine warmed up it has a very slight Miss at idle. It's not real noticeable but I do notice.
2. Warm engine at idle looks like it's about 25 pounds of oil pressure. I was hoping for a little closer to 40 but I'm not sure if this is a real concern or not.
3. When I open the driver's door it sags about a quarter of an inch maybe, maybe not even that much. It closes fine and there doesn't seem to be any issues but is this something that is normal with C6 Corvettes?
The car I drove is a 2010 with 48000 miles on it
1. At idle at a stoplight with engine warmed up it has a very slight Miss at idle. It's not real noticeable but I do notice.
2. Warm engine at idle looks like it's about 25 pounds of oil pressure. I was hoping for a little closer to 40 but I'm not sure if this is a real concern or not.
3. When I open the driver's door it sags about a quarter of an inch maybe, maybe not even that much. It closes fine and there doesn't seem to be any issues but is this something that is normal with C6 Corvettes?
The car I drove is a 2010 with 48000 miles on it
11-26-2016, 04:07 PM
#2
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St. Jude Donor '06-'08-'10-'11-'12-'13 '14-'15-'16-'17-'18-'19
1. Are you sure you aren't noticing a cam lope? These are performance engines and they do lope a little at idle.
2. That's pretty normal oil pressure assuming you are talking about a fully warmed up engine. It would be higher on a cold engine.
3. !/4" inch sag measured from where? If the door is closing normally, that tells me there is no sag to worry about?
2. That's pretty normal oil pressure assuming you are talking about a fully warmed up engine. It would be higher on a cold engine.
3. !/4" inch sag measured from where? If the door is closing normally, that tells me there is no sag to worry about?
11-26-2016, 04:07 PM
#3
Team Owner
1. The LS3's have a gentle lope but never a miss. I think you might have to test a few others to compare to see if what you experienced with this one was normal or not.
2. That's normal.
3. Sagging doors are not normal but since you said it closes fine it might not actually be sagging. I have to say again, you may need to look at a few more to compare this one to.
2. That's normal.
3. Sagging doors are not normal but since you said it closes fine it might not actually be sagging. I have to say again, you may need to look at a few more to compare this one to.
11-26-2016, 05:18 PM
#4
I have a 2011 GS M6.....none of the things you mention are normal....mine has significantly fewer miles....but my Oil pressure is at 40 at idle...no miss....and doors are solid.....I would also suggest driving a few more....there are lots of good ones out there. I had an 04 Z06 before I got this one......You wont regret waiting until you find the exact one you want.....don't settle.
11-26-2016, 06:14 PM
#5
Drifting
The idle PSI sounds within reason if you're really just sitting still for a bit and not moving. The other two could be considered an issue, although they are both more relative to interpretation. If the miss is actually a MISS, it could be a dirty MAF or related to IAC/intake issues.
The door issue doesn't sound like a one-off from what I've seen, but it's not really "normal" either. I've got a friend with a 2011 GS and the passenger door is notorious for dropping a but when you first unlatch it. Don't know if he knows that, but I sure do when I get in.
The door issue doesn't sound like a one-off from what I've seen, but it's not really "normal" either. I've got a friend with a 2011 GS and the passenger door is notorious for dropping a but when you first unlatch it. Don't know if he knows that, but I sure do when I get in.
11-26-2016, 06:17 PM
#6
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Hello all. I'm looking to buy my first Corvette and have some questions. I'm looking at 2010 to 2013 Grand Sports. I just went and test drove one and three things caught my attention.
1. At idle at a stoplight with engine warmed up it has a very slight Miss at idle. It's not real noticeable but I do notice.
2. Warm engine at idle looks like it's about 25 pounds of oil pressure. I was hoping for a little closer to 40 but I'm not sure if this is a real concern or not.
3. When I open the driver's door it sags about a quarter of an inch maybe, maybe not even that much. It closes fine and there doesn't seem to be any issues but is this something that is normal with C6 Corvettes?
The car I drove is a 2010 with 48000 miles on it
1. At idle at a stoplight with engine warmed up it has a very slight Miss at idle. It's not real noticeable but I do notice.
2. Warm engine at idle looks like it's about 25 pounds of oil pressure. I was hoping for a little closer to 40 but I'm not sure if this is a real concern or not.
3. When I open the driver's door it sags about a quarter of an inch maybe, maybe not even that much. It closes fine and there doesn't seem to be any issues but is this something that is normal with C6 Corvettes?
The car I drove is a 2010 with 48000 miles on it
does have a little lope as all do at idle
oil pressure is about 30 at idle, warm
no sag, are you sure as others have said ??
NSF
11-26-2016, 07:44 PM
#9
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1: The oil pressure sounds pretty close to normal. You might check the radiator to see if it is OEM or if an oil cooler is installed that's OEM. If it is a manual, it certainly has an external oil cooler and it will drop the psi a bit when fully warmed, like getting off the freeway. Sky High, what is the oil temp at? Just because the coolant is at 190 doesn't mean the engine is warmed up. The engine is fully warmed up when the oil temp is up around 200+.
2: Idle miss, most likely cam lope. They do that, this is a high performance engine.
3: Door sag, it shouldn't. In the past there were complaints about the door hinge on the door side was cracked. I would open the door and flex it up and down a bit to see if there is an issue. Shouldn't be any movement on the door or the hinge plate.
The GS is a great car and a great choice.
2: Idle miss, most likely cam lope. They do that, this is a high performance engine.
3: Door sag, it shouldn't. In the past there were complaints about the door hinge on the door side was cracked. I would open the door and flex it up and down a bit to see if there is an issue. Shouldn't be any movement on the door or the hinge plate.
The GS is a great car and a great choice.
11-26-2016, 07:56 PM
#10
Drifting
1) Cam lope probably. My LS1 had it and my LS3 has it. They are not perfectly smooth like most modern engines. There should be a code if there is a misfire.
2) Oil press probably ok. Do a google search for LS3 oil pressure and you will see readings from 25-40 in various platforms. There is a spec in the maint manuals and the low pressure warning is more than likely a very low number at idle.
3) Door. I don't recall mine sagging but I've never measured it. Chevy body shop should be able to tell you if there is a problem.
2) Oil press probably ok. Do a google search for LS3 oil pressure and you will see readings from 25-40 in various platforms. There is a spec in the maint manuals and the low pressure warning is more than likely a very low number at idle.
3) Door. I don't recall mine sagging but I've never measured it. Chevy body shop should be able to tell you if there is a problem.
11-26-2016, 08:33 PM
#11
1: The oil pressure sounds pretty close to normal. You might check the radiator to see if it is OEM or if an oil cooler is installed that's OEM. If it is a manual, it certainly has an external oil cooler and it will drop the psi a bit when fully warmed, like getting off the freeway. Sky High, what is the oil temp at? Just because the coolant is at 190 doesn't mean the engine is warmed up. The engine is fully warmed up when the oil temp is up around 200+.
2: Idle miss, most likely cam lope. They do that, this is a high performance engine.
3: Door sag, it shouldn't. In the past there were complaints about the door hinge on the door side was cracked. I would open the door and flex it up and down a bit to see if there is an issue. Shouldn't be any movement on the door or the hinge plate.
The GS is a great car and a great choice.
2: Idle miss, most likely cam lope. They do that, this is a high performance engine.
3: Door sag, it shouldn't. In the past there were complaints about the door hinge on the door side was cracked. I would open the door and flex it up and down a bit to see if there is an issue. Shouldn't be any movement on the door or the hinge plate.
The GS is a great car and a great choice.
11-26-2016, 08:47 PM
#12
Advanced
A car with dry sump is going to run a higher oil pressure than a wet sump. I see around 38-40 psi at idle fully warmed up, oil temp around 190. My car has the dry sump and larger oil cooler. Wet sump cars I expect around 25 psi and a higher oil temp fully warmed up.
Last edited by Kurt D; 11-26-2016 at 08:50 PM.
11-26-2016, 11:50 PM
#13
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St. Jude Donor '06-'08-'10-'11-'12-'13 '14-'15-'16-'17-'18-'19
I hope I don't offend anyone here, but in two postings, folks have referred to "oil temp of 185/190". I am assuming you guys have separate oil temp gauges because the stock dash gauge below the oil pressure gauge is engine coolant temp, not oil temp.
I think your oil temp should be 200 or a little more on a fully warmed up engine, with the engine coolant around 190. Even though the manual states oil pressure of 20 psi is acceptable, I think that is crap. I have probably seen no less than 500 ls3 OP gauges this year, at full operating temp, and maybe 3% of those have been under 30psi. Most are close to 35psi at operating temp. NOTE: those are for base engines, only.
I think your oil temp should be 200 or a little more on a fully warmed up engine, with the engine coolant around 190. Even though the manual states oil pressure of 20 psi is acceptable, I think that is crap. I have probably seen no less than 500 ls3 OP gauges this year, at full operating temp, and maybe 3% of those have been under 30psi. Most are close to 35psi at operating temp. NOTE: those are for base engines, only.
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ByByBMW (11-27-2016)
11-27-2016, 09:15 AM
#15
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Yeah I opened the door and grabbed it at the handle area and I can move the door up and down around 1/8-1/4" It's not much but it's noticeable.
The idle might be the cam. It was idling around 500-550 at warm (after test driving it) and the tach needle would surge a little, not much.
The idle might be the cam. It was idling around 500-550 at warm (after test driving it) and the tach needle would surge a little, not much.
11-27-2016, 02:06 PM
#17
Team Owner
1. The LS3's have a gentle lope but never a miss. I think you might have to test a few others to compare to see if what you experienced with this one was normal or not.
2. That's normal.
3. Sagging doors are not normal but since you said it closes fine it might not actually be sagging. I have to say again, you may need to look at a few more to compare this one to.
2. That's normal.
3. Sagging doors are not normal but since you said it closes fine it might not actually be sagging. I have to say again, you may need to look at a few more to compare this one to.
If it was actually a miss, the computer would detect it and throw a code.2. Normal...check the owners manual. Have you ever looked at buying a car and hoping for a particular oil pressure before?
3. If the door closes fine then it is fine. If it really needs adjustment, that's easy. Like any other car, loosen bolts holding door to frame, jack up end of door a bit and then tighten bolts. Nothing special about a Corvette door.
Don't overthink the purchase...investigate the condition, color, options and then go with one you like. There are lots of good ones out there because so many are purchased and then not driven.
11-28-2016, 06:36 PM
#18
Instructor
I have a 2010 M6 'vert. Oil pressure is about 35psi warm idle. (My 2010 Suburban with a 5.3 is just about the same)
The car has a lope. Honestly, I only notice it if the car is idling and my hand is on the stick. You can hear it in the exhaust but I don't feel it in the steering wheel or any other part of the car.
The door should not drop at all. If it does it is most likely a worn bushing in the hinge. Another possibility is the striker is adjusted too high and it is actually moving the door up when it is being closed.
The car has a lope. Honestly, I only notice it if the car is idling and my hand is on the stick. You can hear it in the exhaust but I don't feel it in the steering wheel or any other part of the car.
The door should not drop at all. If it does it is most likely a worn bushing in the hinge. Another possibility is the striker is adjusted too high and it is actually moving the door up when it is being closed.
11-29-2016, 06:29 AM
#19
Safety Car
my wet sump car idles at 38 psi warm.normal range
