How difficult is it to replace the timing chain gasket? Mine is leaking oil. I changed out the rocker cover gasket but still have problems.
CK5
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replacing the timing chain gasket on a 350
- Thread starter wazzabie
- Start date
pretty easy, just takes a bunch of time...You gotta strip the front of the motor. You got to unbolt the oil pan as well...
x2, no sence in pulling all that off just to swap a gasket, might as well swap the timing gear/chain as well. You will need a gear puller for the crank gear.
Timing chain and grear set have about 80k on it. How often should this be replaced?
the book says 60k...Ive seen them last way longer then that.
What book is that? Is that a factory recommendation?
you'll also need a harmonic balancer puller....
63chevyll
1/2 ton status
You can get by without pulling oil pan and gasket unless you have decided to do both.
I'd need a picture but you can grind a little off the sides of the front seal retainer sheet metal thing on the timing cover
I'd need a picture but you can grind a little off the sides of the front seal retainer sheet metal thing on the timing cover
63chevyll
1/2 ton status
I guess we should know what year the truck or engine is.
The vortec roller blocks require a new timing cover and they are plastic. Which could be re sealed with just silicon if it was the only option
The vortec roller blocks require a new timing cover and they are plastic. Which could be re sealed with just silicon if it was the only option
It is a 350 in a 78 K5. The oil pan gasket was replaced not to many miles ago.
I just changed out the cam in my truck... I'd recommend replacing timing chain/gears with double roller set, not too expensive and worth it if you're tearing it apart that far anyways. You'll need damper puller/installer and gear puller for crank gear. Oil pan doesn't need to be dropped, just loosen front 7/16 screws until they're almost out and loosen the rest of the 5/16 bolts to the back of the pan. As stated before, you'll have to tear the front of the engine down, no biggie, you'll just need to replace antifreeze once you pull the water pump.
Good luck, not a hard job just takes time!
Good luck, not a hard job just takes time!
63chevyll
1/2 ton status
Keep in mind if you use a double roller chain check chain to block clearance at the cam gear end
63chevyll
1/2 ton status
A double roller timing chain is wider than a stock chain and sometimes the casting behind the cam gear/chain needs to be ground down a little. No biggie tho.
Some blocks are fine and some need ground a little.
Better to check it then to start it and have a loud azz noise.
Some blocks are fine and some need ground a little.
Better to check it then to start it and have a loud azz noise.
teacher_dave
1/2 ton status
I always end up with bruised ribs after hanging over the core support for half a day.
What is the advantage of a double roller chain? What brand should I look for?
They dont stretch like typical stock chains will,and the double sprockets ensure it'll last twice as long too,they keep the timing more accurate over a longer time period..
I have removed many crank gears by using a sharp chisel,just place it in between the teeth over the keyway and smack it once with a hammer,they crack open like peanut brittle prety easily...then it'll come right off--just be sure no peices get into the oil pan..I've had none chip off so far,every time I've done this they just split right open..
I have also replaced timing covers on chevy V8's many times without touching the oil pan blots--you'll need to grind off some of the timing covers portion where the "smile" gasket sits to allow it to be tilted inward with the pan still on,I use black RTV on that rubber seal and on the edges of the oil pan ..have had good luck doing that way,no leaks..a phillips screwdriver can be used as an alignment tool thru one of the timing cover holes ,to help align it with the blocks bolt holes while installing the cover..
I have removed many crank gears by using a sharp chisel,just place it in between the teeth over the keyway and smack it once with a hammer,they crack open like peanut brittle prety easily...then it'll come right off--just be sure no peices get into the oil pan..I've had none chip off so far,every time I've done this they just split right open..
I have also replaced timing covers on chevy V8's many times without touching the oil pan blots--you'll need to grind off some of the timing covers portion where the "smile" gasket sits to allow it to be tilted inward with the pan still on,I use black RTV on that rubber seal and on the edges of the oil pan ..have had good luck doing that way,no leaks..a phillips screwdriver can be used as an alignment tool thru one of the timing cover holes ,to help align it with the blocks bolt holes while installing the cover..
Great advice. After taking the timing chain off for replacement will I need to reset the timing? How will I know that the timing chain is set back on correctly?
British Slave
1/2 ton status
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Yes, the timing will need to be reset. The gears will have marks to line up.
