Timing chain replacement slipping

ELIKEARNS2

MEMBER
2011 KIA SEDONA
3.5L
V6
2WD
AUTOMATIC
100,000 MILES

I've just. Replaced the timing chain and all the guides and the tensioners in my vehicle listed above. But when turned the pulley to check that the chain will stay it slips and I'm trying to figure out why. What would cause this? Do I need to replace the gears as well?

5 Replies

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

Is the tensioner engaged? This would be the only thing besides worn teeth on the sprocket that I can think of that would cause the timing chain to jump teeth. Also are you turning the crankshaft clockwise to check the timing marks? In the diagrams down below I have included a couple of excerpts from the installation guide of the vehicle manufacturer that might be of help to you. I hope this helps.

Thanks,
Alex
2CarPros

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Tuesday, December 3rd, 2019 AT 1:41 PM

ELIKEARNS2

MEMBER
3 POSTS

Thank you for your reply. I did turn it clockwise and I put on the parts in the order they have it on the Haynes manual for my vehicle, how would I know if the sprockets are worn, they seem to be fine. Is there anything else that could be the problem?

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Tuesday, December 3rd, 2019 AT 2:13 PM

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello again,

Did you do everything in the order of the excerpt that I sent along with my last reply? Haynes manuals can be vague, or like Chiltons, sometimes wrong. The excerpt that I sent comes straight from the vehicle manufacturer, and give the order in which everything needs to be installed to keep the chains tight. Please get back to us with what you find out.

Thanks,
Alex
2CarPros

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Tuesday, December 3rd, 2019 AT 5:31 PM

ELIKEARNS2

MEMBER
3 POSTS

I did it in the order of the excerpt you sent and it's still slipping, would the sprocket teeth wear in uniform because it does seem that the teeth are a bit flattened? But I didn't know if that was just the way the were designed, since there seemed to be quite a bit of depth to them still. So I guess my question is. Are the teeth suppose to have an edge or are they sort of flattened? Thank you very much for your help!

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Tuesday, December 3rd, 2019 AT 9:02 PM

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello again,

The timing gears should have sharp teeth on them, kind of like a bicycle sprocket would have. Do you have the chain guides maybe misplaced? With the chain properly installed and the chain guides in place, you should be able to just pull whatever you have holding the tensioner in the compressed mode out so that it engages and that timing chain should be tight and ready to go, assuming you have the painted link lined up with the appropriate timing marks. Please double check the guides for proper installation and get back to us with what you find out please.

Thanks,
Alex
2CarPros