timing chain replacement write up?

[montyd]

ive been looking around for about an hour now because it seems like i saw a lik somewhere around here for a write up on how to change the timing chains on a mm. im going to be doing mine soon and wanted to read it. did i see a link somewhere or am i nuts?:dunno: could really go wither way lol

[RacerX]

Mach1 is same as ours: http://mach1registry.org/forums/attachment.php?attachmentid=45 739&d=1259076180

[a_d_a_m]

The chains generally don't go bad on these. I replaced the torn-up tensioner arms when I did my #8 cylinder head repair but the chains were fine. When I did, I had the chains all off, so maybe this (http://crownvic.ca/forum/showthread.php?tid=1712&pid=14099#pid14099) will help you.

[montyd]

I already spent 460 bucks on the kit with the chains. So I might as well change them

[montyd]

And the mach1 registry wont let me see it since I'm not a member. Guess ill join lol

[eric jones]

Are you going to do the Hex-A-Just gears and have the cams degreed?

[montyd]

I just ordered the Ford racing kit. I think the gears are just stock type gears. There not here yet so I'm not sure.

[eric jones]

Anyone ever had their cams degreed? If so what gains did you see any problems or concerns?

[RacerX]

Anyone ever had their cams degreed? If so what gains did you see any problems or concerns?
Degreeing stockers? Advancing stockers? 96-98 Cobra cams advanced and degreed? Aftermarket degreed to spec card? SC'd? NA? ;)

http://www.compcams.com/technical/instructions/files/145.pdf

[na svt]

There's no benefit to degreeing the stock cams. There's also no benefit to replacng the timing chains if the current ones are serviceable. Keep the new stuff till they're needed.

[na svt]

-remove acc. belt
-remove water pump pulley
-remove hydraboost pulley
-remove damper
-remove upper intake
-remove valve covers
-remove timing cover
-rotate engine until the dot on the crank gear is at 6:00 and the "dots" on the primary cam gears are near 12:00
-install cam holding tools in the back of the cams
-remove cam bolts
-remove primary cam gears and chains
-compress secondary tensioners and "pin" (to keep compressed)
-remove secondary cam gears and chains
-remove guides (if replacing)
-remove primary tensoiner (if replacing)

-reassemble
-install secondary gears and chains
-remove pins from secondary tensioners
-install primary gears and chains
-install cam bolts
-remove cam holding tools
etc.............

I have setep by step instructions on how to reassemble nasvt at yahoo

[lifespeed]

There's no benefit to degreeing the stock cams. There's also no benefit to replacng the timing chains if the current ones are serviceable. Keep the new stuff till they're needed.

Don't cam chains stretch with mileage? Obviously there is no problem with them breaking, but cam timing would gradually retard with a stretched chain. I can't imagine why you wouldn't replace them if you're in there anyway.

Any idea what the lifespan of this hardware is? I guess there is "broken", where the guides/tensioners are so worn they make noise and beat things up, and then there is a judicious replacement interval where you're avoiding running them through the last sloppy 20% of their service life.

[na svt]

Don't cam chains stretch with mileage? Obviously there is no problem with them breaking, but cam timing would gradually retard with a stretched chain. I can't imagine why you wouldn't replace them if you're in there anyway.
They stretch very little.

The only reason he'll be in there is to replace teh chains.


Any idea what the lifespan of this hardware is? I guess there is "broken", where the guides/tensioners are so worn they make noise and beat things up, and then there is a judicious replacement interval where you're avoiding running them through the last sloppy 20% of their service life.
These parts don't have a service life, if the did Ford would have established a set mileage to for replacement. There are many 4.6s with over 200,000 miles on them and they are running fine.

These aren't pinto engines that need the cam belt replaced at 40,000.

[RacerX]

They stretch very little.

The only reason he'll be in there is to replace teh chains.


These parts don't have a service life, if the did Ford would have established a set mileage to for replacement. There are many 4.6s with over 200,000 miles on them and they are running fine.

These aren't pinto engines that need the cam belt replaced at 40,000.
Actually, I believe there's a marauder with 300+k here and I'm sure there are cabs and police cars out there with that too. Stock chains!:beer: