Low Oil Pressure on DIC

[talwell]

If it is popping at idle you have a problem - could be a spun bearing throwing the it of balance and causing the popping situation. Unfortunately it does sound like you have an internal problem if the knock was evident - I had the high pressure bypass stick open on my 1998 Corvette and dropped pressure to the point it spun a bearing. Unfortunately even though the issue was one that was a known defect (wish I knew about it prior) the car was out of the 3 year warranty and I had to cover all the costs for rebuilding.

I ran mine car for a few miles yesterday to the hand car wash - when the engine and trans was cold I noticed the that shifting was much harder than when the temperatures are warmer. Once the car was all warmed up the shifting was smooth as normal.

[jims69ss]

Hopefully by days end i will have a better understanding where they are at with my car

[jims69ss]

Today they are pulling the motor and replacing the Oil Pressure Relief Valve in the oil pan.
does anyone know what exactly this valve does ?

[fazm]

so let me get this straight... they are acknowledging that you had low/lack of oil pressure, causing the engine to knock, which is the engine being damaged, but they arent going to replace the engine?

i would be making some phone calls.

[jims69ss]

they are telling me they are going by what GM is telling them to do.....I AM LIVID

[Dave Coyle]

I would push the issue of future bearing failure due to low/no oil geting to them. It may run fine after they "fix" the problem but the damage is done and you have killed most likely 50% or more of the bearing life. Get ahold of someone direct from GM and get a NEW MOTOR installed!!!!

[talwell]

Originally Posted by jims69ss

Today they are pulling the motor and replacing the Oil Pressure Relief Valve in the oil pan.
does anyone know what exactly this valve does ?

This sounds like the same thing that went wrong with my Corvette - on the Corvette it was called the Oil Pressure Bypass - sounds the same as what you say. In any event, it would appear that the Oil Pressure Relief Valve would work to reduce high oil pressure that could stress seals and other internal parts. When it happened to my car they told me there was a flaw with them and that the bypass would malfunction and cause the loss of oil pressure and in my case it caused a bearing to spin and had several rod knocks.

In any event - unfortunately for warranty purposes they only have to repair what they feel is broken. The decision is always made to the side of the lower cost. If they can replace your crank, rods and bearings cheaper than replacing the whole engine that is exactly what they will do. Be sure to document the whole process - if they have your car out of service for more than 21 days it begins to qualify as a lemon and they would have to buy it back from you at full price.

[Supermans]

Originally Posted by fazm

so let me get this straight... they are acknowledging that you had low/lack of oil pressure, causing the engine to knock, which is the engine being damaged, but they arent going to replace the engine?

i would be making some phone calls.

It would not be fair to you since you do have a warranty with the company which guarantee's you a new engine if it got damaged by another part necessary for it to run correctly. I would definitely be making some calls to GM.

[POWERFREAK]

Originally Posted by talwell

This sounds like the same thing that went wrong with my Corvette - on the Corvette it was called the Oil Pressure Bypass - sounds the same as what you say. In any event, it would appear that the Oil Pressure Relief Valve would work to reduce high oil pressure that could stress seals and other internal parts. When it happened to my car they told me there was a flaw with them and that the bypass would malfunction and cause the loss of oil pressure and in my case it caused a bearing to spin and had several rod knocks.

In any event - unfortunately for warranty purposes they only have to repair what they feel is broken. The decision is always made to the side of the lower cost. If they can replace your crank, rods and bearings cheaper than replacing the whole engine that is exactly what they will do. Be sure to document the whole process - if they have your car out of service for more than 21 days it begins to qualify as a lemon and they would have to buy it back from you at full price.

I hear what your saying...but if it's already knocking, wouldn't that mean there's already damage done, time to replace a little more than just a bypass valve? I certainly would push for a least a new bottom end but ideally a new motor.

[Supermans]

Originally Posted by POWERFREAK

I hear what your saying...but if it's already knocking, wouldn't that mean there's already damage done, time to replace a little more than just a bypass valve? I certainly would push for a least a new bottom end but ideally a new motor.

Yes, knocking does mean the engine has damage to it, without a doubt. If GM is telling you there isn't, then something is wrong with the picture.

[jims69ss]

dealer is telling me they will fix the relief valve, put motor back in car, re-install front end and then go from there....and i said well what if it still taps and or knock is GM going to say now replace the oil pump ? and then remove the front clip AGAIN and pull the motor AGAIN ???? PRESSURE IS BUILDING

[talwell]

Originally Posted by jims69ss

dealer is telling me they will fix the relief valve, put motor back in car, re-install front end and then go from there....and i said well what if it still taps and or knock is GM going to say now replace the oil pump ? and then remove the front clip AGAIN and pull the motor AGAIN ???? PRESSURE IS BUILDING

Jim-

I certainly side with you and would be getting really pissed off. When I bought my 1997 Camaro Z-28 brand new back in 1997 I had a major problem with the transmission. I bought the car to the dealer so many times and they said they could never replicate the problem. The car would not allow you to shift properly (6 speed) and would pop out of gear sometimes. I fought and fought and fought and it never helped. All they would tell me is that they cannot fix it if they cannot find it.

I finally got so pissed off that I called the GM Consumer hotline. I told them that the car has been into the dealer no less than 3 times, that the problem still exists and my complaints are documented. At that point I told them my wife was driving my newborn child in the car and that if something happened to the child as a result of thier not being able to repair the car that I would hold them liable. About 1 week later they completely rebuilt the entire transmission and resolved the problem.

Point of my story is - dont stop calling, yelling, complaining and make sure you document everything. Keep a log of all your calls, who you spoke to, what they told you and what the results were. It only takes your car being out of service for 21 days to be considered a lemon in most states.

[jims69ss]

Dealer replaced oil pressure sensor and oil pressure relief valve, just got car back no problems yet, scratched my door in the process, left my motor and engine bay all dirty and oily, drove my car 40 miles and left me with no gas....f@#$%^& DEALERS

[venice17517]

What dealer is this? I would call GM the number is in the back of the manual. The state GM is in they don't need there dealer's pissing off customers.