2015 6.2L Cranking Compression - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Pulse · 02-25-2016, 01:02 PM

Can anyone tell me how many psi is suppose to be in each cylinder when doing a compression check?

Wife got in a accident and rear ended someone in her car. Damaged a wire in the ecu and the car would not shut off. Off course all of the coolant ran out of the car. It ran for the better part of 20 minutes without coolant at idle.

Of course she tells me the engine got louder and louder as it sat there. We thought it was toast. Come to find out the shop got it fired up after finding the bad wire and it sounds normal to me and we are now thinking maybe it was a fan rubbing or something else.

That being said the shop said the engine has 175 psi in each cylinder when they did a compression test. The car is a 2015 SS with the 6.2 L engine and it has 2000 miles total.

I have requested that they scope the cylinder walls to ensure that there is no cylinder scoring and they are fighting me on it.

christianchevell · 02-25-2016, 05:26 PM

The correct thing to do in that case would have been open the trunk and disconnect the battery to stop the engine. The heating of the engine may not have been that bad but its certainly not good for it. with damage to the radiator it could have had a scraping sound from the plastic blades hitting the radiator fins ... You yourself can stick a camera in the thing in all the spark plug holes and inspect it yourself..... they are not that expensive and even are rented by some equipment companies. Our engines have two coolant fans as you know electric and mounted to the radiator on their shroud. You may have dodged a bullet..LOL

69L48Z27 · 02-25-2016, 07:25 PM

175 psi is a good number.

blakjak55 · 02-25-2016, 07:54 PM

Quote:

Originally Posted by 69L48Z27

175 psi is a good number.

This. Most important thing is that the cylinders are all close to each other in readings; GM says all within 70% of each other. 160-190 are probably what 99% of people will read on a stock engine.

They should do a leak down test also but those are definitely good numbers.

Pulse · 02-26-2016, 01:05 AM

Thanks for the responses. At this point I am not buying anything to do it myself as I need all of this documented as it's an insurance issue.

02-25-2016, 01:02 PM	#1
Pulse Drives: 2015 Camaro SS Join Date: Oct 2015 Location: Reno Posts: 13	2015 6.2L Cranking Compression Can anyone tell me how many psi is suppose to be in each cylinder when doing a compression check? Wife got in a accident and rear ended someone in her car. Damaged a wire in the ecu and the car would not shut off. Off course all of the coolant ran out of the car. It ran for the better part of 20 minutes without coolant at idle. Of course she tells me the engine got louder and louder as it sat there. We thought it was toast. Come to find out the shop got it fired up after finding the bad wire and it sounds normal to me and we are now thinking maybe it was a fan rubbing or something else. That being said the shop said the engine has 175 psi in each cylinder when they did a compression test. The car is a 2015 SS with the 6.2 L engine and it has 2000 miles total. I have requested that they scope the cylinder walls to ensure that there is no cylinder scoring and they are fighting me on it.

02-25-2016, 05:26 PM	#2
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,587 View My Garage	The correct thing to do in that case would have been open the trunk and disconnect the battery to stop the engine. The heating of the engine may not have been that bad but its certainly not good for it. with damage to the radiator it could have had a scraping sound from the plastic blades hitting the radiator fins ... You yourself can stick a camera in the thing in all the spark plug holes and inspect it yourself..... they are not that expensive and even are rented by some equipment companies. Our engines have two coolant fans as you know electric and mounted to the radiator on their shroud. You may have dodged a bullet..LOL __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop

02-25-2016, 07:25 PM	#3
69L48Z27 Drives: 2015 Z/28; 1969 Camaro SS Join Date: Nov 2015 Location: York, PA Posts: 805	175 psi is a good number.

02-26-2016, 01:05 AM	#5
Pulse Drives: 2015 Camaro SS Join Date: Oct 2015 Location: Reno Posts: 13	Thanks for the responses. At this point I am not buying anything to do it myself as I need all of this documented as it's an insurance issue.