Electric Vehicle Forums - Timing chain replacement

Electric Vehicle Forums (/forums/)

- GM Hybrid Trucks, Cadillac Escalade Hybrid, Chevrolet Tahoe Hybrid & GMC Yukon Hybrid (https://electricvehicleforums.com/forums/gm-hybrid-trucks-cadillac-escalade-hybrid-chevrolet-tahoe-hybrid-gmc-yukon-hybrid-69/)

- - Timing chain replacement (https://electricvehicleforums.com/forums/gm-hybrid-trucks-cadillac-escalade-hybrid-chevrolet-tahoe-hybrid-gmc-yukon-hybrid-69/timing-chain-replacement-31486/)

ClintKent

03-08-2018 01:44 AM

Timing chain replacement

When i was driving my 09 tahoe 6.0 hybrid home one day it just died while driving. Took to dealership and they said it was the hybrid battery and charged 4800 cad for new one. They installed and then said timing chain jumped several spots and bent some valves and want another $9000 to fix. I said screw you! Anyone have any recommendations on replacing timing chain and possible valve solutions? Thanks

Hillbilly_Hybrid

03-08-2018 08:52 AM

Re: Timing chain replacement

Sounds like the timing went while driving. NOT the battery.

They should take the price of the battery off the engine repair.

The heads have to come off to fix the valves. It's a major job

SonomaGTLS6

03-08-2018 10:51 AM

Re: Timing chain replacement

Strange that the timing chain would skip...how many miles on this engine? I would be concerned there was some other cause for the crank to cam timing getting so out of whack.

ClintKent

03-08-2018 01:41 PM

Re: Timing chain replacement

220,000 kms on it. Where can I get info on taking off the heads and replacing the chain myself? I love my Tahoe so I got to get her up and running again. I have a three year warranty on new battery and it's been sitting for one.

SonomaGTLS6

03-08-2018 02:34 PM

Re: Timing chain replacement

Quote:

Originally Posted by ClintKent (Post 265058)

If pushrods end up being bent you might be better off just pulling motor and going through it. If it were me (a typical DIYer), I would first look at the procedure of safely disconnecting the 300V system, then follow head gasket replacement procedures to get at the heads. Lots of info online about replacing the timing chain as well. Being a 2009 has your truck had any of the AFM service on it? I believe early issues on AFM caused lifter, camshaft and oil consumption issues...makes me wonder if something happened with camshaft and caused the chain to skip.

ClintKent

03-08-2018 06:49 PM

Re: Timing chain replacement

Thanks. I found timing chain info but can't find any resources on safely disconnecting the 300v system.

Hillbilly_Hybrid

03-12-2018 07:40 AM

Re: Timing chain replacement

Passenger side of middle row seat has an access cover.

Disconnect the 12V battery first.

Then remove the plastic trim cover on the passenger side of battery cover. Leave the larger carpeted cover on... unless you want to inspect the inlet grate for battery airflow.

There is an Orange manual disconnect. A two step process to remove and install.

Slide latch UP. Then pull back 90 degrees and remove.

To install, plug in, flip latch UP. Slide down.

To do engine service, nothing more than disconnecting 12V is really required.

SonomaGTLS6

03-12-2018 11:08 AM

Re: Timing chain replacement

Quote:

Originally Posted by Hillbilly_Hybrid (Post 265077)

To do engine service, nothing more than disconnecting 12V is really required.

Good to know...just figured it'd be a good idea to disconnect 300V since some of the work would be going on around the ECU on passenger side.

ClintKent - If you end up doing this, take some pics and post up what you find. Would be curious to see what happened.

Hillbilly_Hybrid

03-13-2018 05:46 AM

Re: Timing chain replacement

Always better safe.

All times are GMT -7. The time now is 04:02 PM.