Who has the highest milage?

[mag03kj]

Been turning wrenches professionally for 14 years,ASE Master Tech for 12 of those years,I either know or know were to find the info.

oh ok...lol im more of the backyard turner..lol

 

[tjkj2002]

So no maintenance on the chain? Not like a belt at 50-60k?

Nope no scheduled maintenance for the chains,they usually last the life of the engine(150,000-200,000miles).I've read some 4.7's,they use a identical setup,last well over 250,000miles on the OEM chains.The tensioners on the other hand will wearout well before the timing chains will since they are plastic(150,000-200,000miles is about the standard),might as well replace the chains at the same time since a failed/failing tensioners can take out the chains(chain stretch).

 

[candpliberty]

Thanks, TJKJ!

 

[mag03kj]

Nope no scheduled maintenance for the chains,they usually last the life of the engine(150,000-200,000miles).I've read some 4.7's,they use a identical setup,last well over 250,000miles on the OEM chains.The tensioners on the other hand will wearout well before the timing chains will since they are plastic(150,000-200,000miles is about the standard),might as well replace the chains at the same time since a failed/failing tensioners can take out the chains(chain stretch).

the chains are plastic???

 

[tjkj2002]

the chains are plastic???

No but the chain tensioners are.

 

[mag03kj]

No but the chain tensioners are.

why tho thats kinda stupid

 

[tjkj2002]

why tho thats kinda stupid

Actually not stupid,you don't want the chain rubbing against steel,they both would wearout much faster.The only reason there are tensioners is the great span the chains need to go for the overhead cams to the crankshaft.

 

[mag03kj]

oh ok lol...well where do you work at...

 

[Atrus]

The 3.7 is a SOHC engine,it has connecting rods where the term "throwing a rod" comes into play,actually all engines no matter what configuration has connecting rods that go from the crankshaft and piston.

SOHC = Single Overhead Cam
DOHC = Dual Overhead Cam
OHV = Overhead Valve-uses pushrods,can in the block.

Right - I wasn't thinking connecting rod, I was thinking pushrod. We have no pushrods.

 

[loves_off_roading]

Wow I have a lot of catching up to do! Mine only has 83,000