Hey guys

Background on vehicle: Stock 2015 C7 Z51 with 13k mileage.

I was out for an early morning sunday drive and then all of a sudden there was a massive vibration from what felt like the engine. At the same time I got a check engine light along with a Service Rear Drive Shaft alert as well as a Service Stabiltrak alert.

I instantly pulled over, tapped the onstar button and 30min later the tow truck came and the car was off to the dealership.

Week 1 at the dealership:
- They felt it was probably something to do with the fuel injectors as it is a common issue when those warning lights come on supposedly.
- After a couple days they found it to be a faulty fuel injector on cylinder #5.
- They wanted to do more diagnosing to see if there was anything else at play to these issues that occurred.

Week 2 at the dealership:
- Today is Wednesday morning and I just got the call that there is even worse damage
- It seems that the pushrod on cylinder 5 has completely broken in half!
- They are checking the valve/piston/cylinder to see if there was any more damaged cause from the pushrod and I should hear back more by end of day tomorrow.


QUESTION
- If for example the pushrod is replaced and or any other engine work is done - this will show up in the carfax report correct? Would this effect the resale value for my vehicle?

 

Very unusual! Bent pushrods if over revved (which unless you had a tune, should never happen!) Could overrev if it's a standard shift and was downshifted when engine speed would be excessive. They can see that in the record. Broke sounds like a defect. If it broke because of a defect probably no other damage. If a valve stuck, for whatever reason and it was the cause then more involved and more parts to fail. Would not think CarFax would pick up any engine part issue. Keep us posted.

 

Dang that really sucks. Hopefully it didn't cause any internal damage.

 

Push rod is an easy fix. It sits on top of the lifter and under a rocker arm. All they have to do is replace it and adjust the valve lash. It won't show up on any report or effect the resale value.

 

I have seen oil changes and tire replacements show up on Carfax so my guess is that it would. That being said, I imagine it could possibly hurt your resale value. I think it would depend on how long you kept the car after the repair. If you kept it for a while without anymore mechanical issues your losses would be minimal. IMHO..

 

I would be tempted to trade it. Your dealer knows the story and should compensate you accordingly.

 

A savoy buyer would pull the history by VIN which just about any GM dealer will provide for the asking.

 

According to my friend who is a head chevy tech at a different dealership mentioned to me that it would just show up as an engine repair in the vehicle history and nothing alarming or major.

 

It's a broken pushrod, an easy fix...it's not like it throw a connecting rod or spun a main bearing. Anyone telling you to trade it in or sell it doesn't understand the mechanics of an engine.. Enjoy your car after the pushrod is replaced.

 

Not sure about that but I know my former C6 had trans work done at the dealer and the GMVIS was real specific.

 

Yes the engine can be repaired and will probably go the distance. Would just irk me, now is the time to replace it.

 

It's a $20 pushrod, pull the valve cover drop it in and adjust the lash.. 1 hour job if you include stopping for dinner..lol For that you'd want want to replace the car, really??

 

This. It's amazing what sets some people off.

 

Nothing alarming or major? If I saw "engine repair" on a vehicle history I would run to the next C7.

 

A relatively new engine properly repaired can end up being far more reliable than one with no prior history of problems. Machinery has a tendency to fail either very early in it's life-cycle or not until it's completely worn out after many years of use.

 

If i were shopping for a used car id move along if i saw engine repair.

 

Was the broken push rod on an intake or on an exhaust valve? A broken push rod on an intake valve probably wouldn't lead to other problems.

However, it might make a difference on an exhaust valve, since the injector will still be putting raw fuel into the cylinder, and you might get a hydraulic lock after lots of revolutions with the exhaust valve staying closed. A hydraulic lock could damage the piston and/or connecting rod. I'd put it in the remotely possible category.

What's interesting is the fact that a problem in the engine generates alerts for the rear axle and Stabilitrak. Is that just to get you to pull over sooner, or does the engine malfunction really mess with those systems?

 

Sensors are "dumb and dutiful." An engine malfunction that causes a sudden reduction in power would be immediately picked up by the sensors for the rear axle and Stabilitrak.

 

Reduction in power? It's hard to imagine how losing one of eight cylinders while cruising along would cause a bigger reduction in power than simply taking your foot off the gas pedal quickly. It would be interesting to see the algorithms ("if this, this, and this, then that") in the computer programming.