RE: Head and Valve Issue

Hummer Forums Hummer Classifieds Photo Gallery Member List Calendars Search Forum FAQ Contact HF Sponsors
Hummer Lineup Hummer News Hummer Recalls TSBs Timeslips Register Login

RE: Head and Valve Issue

Printable Version

Hummer >> Hummer Lineup >> Hummer H3 >> H3 Frequently Asked Questions >> Head and Valve Problems. >> RE: Head and Valve Issue

Page: << < prev 1 [2] 3 4 5 next > >>

Message

<< Older Topic Newer Topic >>

RE: Head and Valve Issue - 3/2/2006 4:49:09 AM

zechsiw

Posts: 4
Score: 0
Joined: 1/6/2006
Status: offline

I got engine problem as well, but it's "crankshaft actuator" problem. it made the engine choke and misfire, and took about 1 week to fix.
the problem is I still don't know what "crankshaft actuator" is, anyone have idea?

(in reply to btstyx)

Post #: 16

RE: Head and Valve Issue - 3/2/2006 8:45:44 AM

Dennis

Posts: 7584
Score: 0
Status: offline

quote:

ORIGINAL: zechsiw

I got engine problem as well, but it's "crankshaft actuator" problem. it made the engine choke and misfire, and took about 1 week to fix.
the problem is I still don't know what "crankshaft actuator" is, anyone have idea?

I'm not sure either..But in other cars that have simular symptoms, I understand there is a device or sensor that is called the "Cranshaft angle sensor" or "Crankshaft position sensor"...But both basically do the same thing..It indicates to the ECU where the Crankshaft IS, so the ignition timing can stay in line to fire the spark plugs at the proper time...But that's an engine Ignition control device problem and not an engine problem itself per say...At least that is what it sounds like to me.

(in reply to zechsiw)

Post #: 17

RE: Head and Valve Issue - 3/2/2006 2:48:09 PM

branstone

Posts: 230
Score: 0
Joined: 2/1/2006
Status: offline

Just went into the shop , same issue !!! misfire, compression leak, 3rd cylinder leaking from valves, they are tearing it apart right now !

(in reply to btstyx)

Post #: 18

RE: Head and Valve Issue - 3/12/2006 5:50:55 PM

zechsiw

Posts: 4
Score: 0
Joined: 1/6/2006
Status: offline

quote:

ORIGINAL: Dennis

quote:

ORIGINAL: zechsiw

I got engine problem as well, but it's "crankshaft actuator" problem. it made the engine choke and misfire, and took about 1 week to fix.
the problem is I still don't know what "crankshaft actuator" is, anyone have idea?

I'm not sure either..But in other cars that have simular symptoms, I understand there is a device or sensor that is called the "Cranshaft angle sensor" or "Crankshaft position sensor"...But both basically do the same thing..It indicates to the ECU where the Crankshaft IS, so the ignition timing can stay in line to fire the spark plugs at the proper time...But that's an engine Ignition control device problem and not an engine problem itself per say...At least that is what it sounds like to me.

I read the paper from dealer again, ya..it's called "Crankshaft position actuator"

(in reply to Dennis)

Post #: 19

RE: Head and Valve Issue - 3/13/2006 3:10:11 PM

G Man

Posts: 92
Score: 0
Joined: 1/13/2006
Status: offline

I talked to my service manager today while dropping off my H3 for several unrelated issues.

He said he has had 6 in for the same reason in the past few months, as well as several Colorado's(same engine). All of the H3's had the problem isolated to the #1 cylinder. He told me that corporate engineering was researching the problem, but no solution had yet been determined. The head is sent off to GM for analysis before the repairs begin. All of the replacement parts(head, valves, valve guides, etc), are the same engineered parts that are currently on the vehicle now. So, even though the dealer is "fixing" the problem, it is really not a proper solution. The thought is that it may be a heat related issue that a simple lower temp. thermostat might fix. If it is heat related, the summer months should really cause this issue to rear it's head. BTW, I got my build date while I was there. October 15, 2005 was a Thursday. So much for the theory that all the problem vehicles were built on Monday and Friday.

< Message edited by G Man -- 3/13/2006 3:13:15 PM >

_____________________________

Gary
2006 H3
2000 C5 FRC
1995 Impala SS
1992 500E Mercedes(Built by Porsche)
G Man's Rides

(in reply to zechsiw)

Post #: 20

RE: Head and Valve Issue - 3/26/2006 12:00:51 PM

IsellHummers

Posts: 6
Score: 0
Joined: 3/26/2006
Status: offline

The head issue is a localized one. The ones in our shop were all built around the same time. The all have problems with the guides giving out and the valves not sealing. It wasn't a big problem on the colorado/canyon and for months not one on the H3. It is a bad shipment of heads to the factory. The reason it takes so long is that GM doesn't sell the heads assembled. The parts dept. has to order all of the parts seperately, which takes about one and a half to two weeks to get in. Then they have to assemble the head themselves. The job is listed with 22 hours of labor. It's not like swapping the head on a small block.

(in reply to G Man)

Post #: 21

RE: Head and Valve Issue - 3/27/2006 4:23:34 PM

AlanH3

Posts: 62
Score: 0
Joined: 3/19/2006
Status: offline

Hi All,

New member here. I got my H3 at the end of January (Dobles also) and today it went in for the dreaded head replacement. They say it will take two weeks.

I can't help worrying about the reliability after the engine has been apart. Who did you talk to about the warranty?

-Alan

(in reply to btstyx)

Post #: 22

RE: Head and Valve Issue - 3/27/2006 6:39:42 PM

btstyx

Posts: 19
Score: 0
Joined: 2/26/2006
Status: offline

Hi I talked to GM customer care. As i said previously I got the extended warranty and a 24,000 service plan. Good luck, Have mine back for a couple of weeks now with no issues. Only time will tell. But it least it'll be GM's problem.

(in reply to AlanH3)

Post #: 23

RE: Head and Valve Issue - 3/28/2006 12:48:17 PM

AlanH3

Posts: 62
Score: 0
Joined: 3/19/2006
Status: offline

Thanks. I will defintiely give GM a call, if only for the peace of mind.

Keep us updated on the repair too.

-Alan

(in reply to btstyx)

Post #: 24

RE: Head and Valve Issue - 3/28/2006 2:49:54 PM

Dennis

Posts: 7584
Score: 0
Status: offline

FYI,

I did some calling around...And my local dealer to date has had not a single H3s with Engine issues of any kind come in..The dealer I bought mine from in Arkansas...Has had two come in with the Valve/head problem since they have been selling H3s...The service manager there, estimates they've sold over 1500 H3s since last year, and they have only the two come in with the head problem. They replaced the whole head with new valves and everything..And they have not had any return issues with them since....The problem with the valves on those two, showed up at around 8000 miles on one and 15,000 miles on the other and said you will know if it happens...It starts running rougher than a cob and misses, etc.

< Message edited by Dennis -- 3/28/2006 3:11:02 PM >

(in reply to AlanH3)

Post #: 25

RE: Head and Valve Issue - 3/28/2006 4:12:14 PM

AlanH3

Posts: 62
Score: 0
Joined: 3/19/2006
Status: offline

That's what happened to mine. Only it started around 4000 miles. Began to run a bit rough, got a little worse, and then the engine light came on. I'm glad to hear the fix is reliable.

I guess I'm one out of 1500 -- why can't I get that luck when I play the lottery?

-Alan

(in reply to Dennis)

Post #: 26

RE: Head and Valve Issue - 3/29/2006 8:19:14 PM

dilo2001gt

Posts: 4300
Score: 0
Status: offline

I was at the dealer today and ask whats going on they had 17 come in with this problem the drilled to deep so the valve don't sit right but once they fix it it a done deal. hopefully it's the newer models sorry

< Message edited by dilo2001gt -- 3/29/2006 8:20:05 PM >

(in reply to AlanH3)

Post #: 27

RE: Head and Valve Issue - 4/14/2006 11:13:27 PM

mjlemon

Posts: 3
Score: 0
Joined: 4/14/2006
Status: offline

I have the exact same issue and my H3 is in the shop as we speak. It has taken 2 weeks to get it done. Worse yet, the dealer's own shop didn't have the right tools or parts and had to order both! New tools! Can you believe it? Then they told me that this was the first one they had ever worked-on with this problem for an H3. They had never had training on this anywhere? They went on to say that they were sending them to Chevy dealers before to fix but the jobs were not getting done right. I can understand a quality issue arising on the cyclinder with a misfire but the lack of tools, parts, or training is really inexcusable. Maybe this is why GM is going under. As of 4 p.m. this afternoon I am told that the engine is back together but that they have one bolt on order that is holding this up. I have forgotten how to drive my H3 and vaguely remember what it looks like!

(in reply to btstyx)

Post #: 28

RE: Head and Valve Issue - 4/14/2006 11:33:08 PM

Dennis

Posts: 7584
Score: 0
Status: offline

I hope they provided you with a loaner all this time...

Unfortunately you got one of the few bad ones..Can you tell us at what mileage this began at?...Make sure to insist on an extended warranty for the engine, some have gotten that.

Once agin, today I was talking with my dealer's service guy here in OKC (we became good friends as a result of owning a Land Rover)..So anyway he said his delaership has sold over 1200 H3 since the beginning...NOT ONE has showed back up for this problem (yet)..He said the only problems they've seen, are a few of the cracked roof rails and wind noise and rattles and TPM sensor problems with main Module..relacement fixes that...so that ain't a bad set of statistics..He jokingly accused me for jinxing the place maybe with my questions about the head/valve issue...Hope not.