timing chain tensioner failure...

[tomcat27]

the day after Christmas my intrepid gave me a gift: timing chain tensioner failure. I have the timing cover off enough to see extreme slack in the chain. I presume that valves are bent. I will do a leakdown test tomorrow to validate. am I probably looking at installing two new cylinder heads and calling it a day?

I replaced all of the timing components 6 months, 6k miles ago as a preventative measure. silly me. I used cloyes chain and gears, and a perfect circle tensioner.... there are 110k miles on the car

 

[AKhan87]

Huh? OEM was good but after replacing with aftermarket it failed?

All my toyotas have OEM timing chain components, never any issue nor have I read of any.

1zz-fe / 2az-fe / 2zz-ge engines.

Unless your engine has a known issue, why mess with things.

I don't really see why your valve will be bent.

 

[tomcat27]

My water pump was seeping. the water pump in the chrysler 2.7 is behind the timing cover and driven by the timing chain. the chain had stretched a little - and it made sense to replace all of those pieces. it's an interference engine - so I'm thinking that since the pistons were moving and the cams were not (I could see through the oil fill hole that the cams were not moving - that's how I knew I had a timing chain issue) that I probably bent some valves. I will know more tomorrow.

and if you visited my local dodge dealer, you would know why I dont want to buy parts from them

 

[AKhan87]

Originally Posted By: tomcat27
if you visited my local dodge dealer, you would know why I dont want to buy parts from them

Lol, I'm lucky, my local Toyota dealer gives me 5% over his cost, PCV Valve, Drain bolts, and sometimes even thermostat is cheaper then the high quality aftermarket parts...

 

[rshaw125]

The last of the 2.7 sludge monsters. I had one in an Intrepid. A 3.5 can be found cheap and slips right in.

 

[Oro_O]

Originally Posted By: 01_celica_gt
Huh? OEM was good but after replacing with aftermarket it failed?

All my toyotas have OEM timing chain components, never any issue nor have I read of any.


Read here. Aisin tensioners fail.

I have a 98 Acura and the dealership re-used the stock Aisin tensioner when doing the belt (same as on most all toyota's since mid 90s). It failed 40k later and tossed the belt.

Replace the tensioner when replacing the belt.

I don't know the OEM of the tensioner in his Intrepid, but it's not safe to generalize that all are good for re-use on a belt change.

 

[ARCOgraphite]

this?

 

[4wheeldog]

Originally Posted By: Or
Originally Posted By: 01_celica_gt
Huh? OEM was good but after replacing with aftermarket it failed?

All my toyotas have OEM timing chain components, never any issue nor have I read of any.


Read here. Aisin tensioners fail.

I have a 98 Acura and the dealership re-used the stock Aisin tensioner when doing the belt (same as on most all toyota's since mid 90s). It failed 40k later and tossed the belt.

Replace the tensioner when replacing the belt.

I don't know the OEM of the tensioner in his Intrepid, but it's not safe to generalize that all are good for re-use on a belt change.


All good advise, except the OP had a CHAIN tensioner fail. Whole different animal.

I wonder if he will find that the attachment point(s) are the actual point of failure.

 

[double vanos]

Unfortunately, the 3.5 Ecoboost engines have the water pump behind the timing chain as well. Just like the picture above....

 

[zzyzzx]

Personally, I would not buy any parts made by cloyes.

 

[tomcat27]

the link (above two responses) is most certainly the engine and the setup. the chain guides are still attached properly - the tensioner is not applying ANY tension. I just pulled the intake and will pull the valve cover next - but its pretty cold out in the garage! my understanding was that Perfect Circle makes a very good tensioner - I believe they are a TRW company but I would have to re-do my research. it's a little irrelevant at this point. I need to figure out if the valves are bent and what needs to be repaired.

 

[AKhan87]

Originally Posted By: 4wheeldog
Originally Posted By: Or
Originally Posted By: 01_celica_gt
Huh? OEM was good but after replacing with aftermarket it failed?

All my toyotas have OEM timing chain components, never any issue nor have I read of any.


Read here. Aisin tensioners fail.

I have a 98 Acura and the dealership re-used the stock Aisin tensioner when doing the belt (same as on most all toyota's since mid 90s). It failed 40k later and tossed the belt.

Replace the tensioner when replacing the belt.

I don't know the OEM of the tensioner in his Intrepid, but it's not safe to generalize that all are good for re-use on a belt change.


All good advise, except the OP had a CHAIN tensioner fail. Whole different animal.

I wonder if he will find that the attachment point(s) are the actual point of failure.
+1
I was referring to the timing chain tensioner, as far as the OEM toyota tensioners are concerned on the 1zzfe, 2zzge, 2azfe, they are all reusable and there is a trick to them if they don't fully open up on their own...you just have to know what to do...So I'm sorry the BELT tensioner on your acura failed but it is different then a timing chain tensioner.

 

[Silverado12]

I'm a Chrysler fan, but they really messed up on the 2.7 engine. I think it's the worst design they ever made. Older Chrysler products were typically easy to work on.