Chevrolet Cruze Forums banner

21 - 27 of 27 Posts

·
Administrator
Joined
·
15,648 Posts
I just want my car fixed, doing new valve cover and intake today, as I am not mechanically inclined. I been having service stabilitrak and misfires since October and I am HOPING these check valves and pcv diaphragm are teh cause. Can anyone tell me if misfires and service stabilitrak could be due to the pcv diaphragm or intake check valve failure?
Most likely not. That may be related to the negative battery cable issue. See here:

http://www.cruzetalk.com/forum/25-gen1-service-issues/102769-special-coverage-14311-negative-battery-cable.html
 

·
Registered
Joined
·
92 Posts
Most likely not. That may be related to the negative battery cable issue. See here:

http://www.cruzetalk.com/forum/25-gen1-service-issues/102769-special-coverage-14311-negative-battery-cable.html
Awesome, I did that fix as well. So far I replaced the ignition coil, new negative battery cable, new spark plugs, and today, new valve cover, new dorman intake manifold, and new pcv hose. Worked great and feel like I got my power back and sound is a little different from engine. LOVE IT. I hope I fixed both misfire/stabilitrak and pcv and all issues related to them all. I want to thank Cruzetalk and it's members for helping me on all these issues.
 

·
Registered
Joined
·
1 Posts
I'm happy to comment on this as I am the part of the development team here at Dorman that helped with the development of this manifold. The manifold actually has an insert in the tool the keeps the PCV Check Valve in place. No future failures will take place. The part is also made proudly in the USA and has undergone a vigorous testing cycle to insure great quality. I would be happy to share with anyone some photo's and 3D models of the fix we created. The part is now in stock all of the country and should be readily available same day. Thank you.



The description is useless, since they talk about coolant passages, which this intake manifold has none of. That was clearly copied off of another intake manifold.

As mentioned above, you still end up with a poor design for the PCV system that integrates a check valve that cannot be serviced. My PCV fix kit is currently $135 including the throttle body spacer, which saves you $30 over the Dorman design and will most likely last the life of the vehicle. Should that check valve need servicing, it can be done for $10-$20, not another $165.

Lastly, I've been wholly underwhelmed with the quality of Dorman parts in the last few years. I have some serious doubts about the reliability of that manifold. GM also released a manifold that has none of the bits that are normally bolted on and were charging $180-$210 for it depending on where you could find one.
 

·
Registered
Joined
·
7 Posts
I'm happy to comment on this as I am the part of the development team here at Dorman that helped with the development of this manifold. The manifold actually has an insert in the tool the keeps the PCV Check Valve in place. No future failures will take place. The part is also made proudly in the USA and has undergone a vigorous testing cycle to insure great quality. I would be happy to share with anyone some photo's and 3D models of the fix we created. The part is now in stock all of the country and should be readily available same day. Thank you.

Can you possibly provide me with a current part number for the updated Dorman intake manifold?
(I have a 2011 Cruze 1.4t LTZ)
I don’t want to accidentally purchase one of the old intakes......

Thanks so much for your help!!!!
 

·
Administrator
Joined
·
15,648 Posts
Just to make something clear, Dorman can't guarantee that the part will never fail. They've only covered one of the failure modes; the disappearance of the check valve. They haven't accounted for the fact that it still gets clogged and gummed up with PCV and oil deposits, causing it to either stick or leak, and still deteriorates over time and fatigue and cracks. I had a friend with a Dorman manifold that modified his to install my PCV fix kit and when he removed his check valve, he discovered it was cracked!

Adding a block behind the check valve on a flawed design does nothing but give people a false sense of security that the check valve is working. Only a vacuum test on the crankcase and a boost leak test on the intake could actually verify that the check valve is working, and perfectly visible check valves on OEM manifolds so have failed one of those tests more times than I can count. It's a flawed design.

Sent from my BlackBerry Key2 using Tapatalk
 
21 - 27 of 27 Posts
Top