Click Here -> Please Consider Making a PayPal Contribution to the FordSix Forum!
2019 Contributors:
NJwpod, 1strodeo, mightynorseman, maxtrux, 6d7coupe, broncr, Phase3, 68Flareside240, bmbm40,
mustang6, WorldChampGramp, justintendo, BigBlue94, ags290, motorsickle1130, Rooster, ousooner919, ethanperry
rzcrisis, DoctorC, jamyers, Motorboy, fastpat, Silverback280, chad


<<< New Site Update >>>

175K miles - phenolyc cam gear

Moderator: Mod Squad

User avatar
tom954x4
Registered User
Posts: 476
Joined: Sun Nov 22, 2009 4:32 pm
Location: Twilight zone, WA

175K miles - phenolyc cam gear

Post #1 by tom954x4 » Sat Mar 28, 2015 7:30 pm

My '95 EFI 300 is aproaching 175,000 miles, with the original cam gear and engine basically still completely stock.
What is the useful life of the fiber cam gear? I drive it pretty hard but keep rpms below 3,000. I like the "if its not broke don't fix it" mindset but I do drive in very remote areas out West looking for rare plants etc. and would really hate for it to fail when I'm in the middle of nowhere. . . .
1995 F-150 XL, 300-6, 4x4, ex-cab, sb, 3.08 5-speed, 2 1/2 in. exhaust w/flowmaster 50, MSDignition failed with no warning, now out, canopy, 179,000 + miles. Gone but not forgotten 1965 F-100 240 3spd lwb "the green hornet"; 1960 F-250 4x4, 223 six, 4sp with wrap-around rear window, two-tone paint, overhead camper.
Tow vehicle: 2012 F-250 4x4 6.7 diesel XLT s/c lwb

arse_sidewards
Registered User
Posts: 840
Joined: Mon Jan 21, 2013 7:18 am

Re: 175K miles - phenolyc cam gear

Post #2 by arse_sidewards » Sat Mar 28, 2015 7:44 pm

They went to the fibre gear in 87. I've heard a dozen or more accounts of 500k+ EFI 6s. I wouldn't worry. It's not an interference engine anyway.
1994 F150 4x4 8ft, engine is basically stock.

66" leafs, extended radius arms, lockers in both ends, nothing special.

Baron Von Ottomatic
Registered User
Posts: 197
Joined: Sat Jul 24, 2010 11:56 pm

Re: 175K miles - phenolyc cam gear

Post #3 by Baron Von Ottomatic » Sat Mar 28, 2015 7:54 pm

Three weeks ago the cam gear on my '96 gave up ~3 hours from home at 9:30 p.m. on a Saturday. I bought the truck with 189,xxx miles and it's got 196,xxx now. No warning, no problems until the gear broke and the truck rolled to a stop on the side of the highway. The Ford dealership in Wichita Falls, TX is still struggling to get the new Cloyes metal gear set I ordered pressed on. It's enough of a pain to change it probably falls in the "If it ain't broke" column, but when/if it breaks you will be stuck. Just pray you have cell coverage when/if it goes.

Lazy JW
FSP Moderator
Posts: 5559
Joined: Fri May 16, 2003 10:25 pm
Location: Careywood, Idaho

Re: 175K miles - phenolyc cam gear

Post #4 by Lazy JW » Sat Mar 28, 2015 11:30 pm

Ummm... warm that gear up on a hot plate to about 300 degrees F and it will slide right on there. Don't dilly-dally though, it shrinks tight pretty fast. And don't forget the little "wedding ring" spacer. I also put the cam in the deep freeze overnight and took it out just prior to installing.

They went to fiber gears a LONG time before 1987 :bang:
Joe
"The White OX" 1974 F-350 300-6, Stock single exhaust, Carter YF, T-18A, Dana70 w/4.11, Flatbed dually w/dump bed. "Where no oxen are, the crib is clean, but much increase is by the strength of the ox" (Proverbs 14:4)
Image

Harte3
VIP Member
Posts: 2643
Joined: Sat Oct 21, 2006 9:17 pm
Location: Spokane, WA

Re: 175K miles - phenolyc cam gear

Post #5 by Harte3 » Sun Mar 29, 2015 10:55 am

"What is the useful life of the fiber cam gear?" So far, it appears like 175K for your vehicle :thumbup:
'83 F150 300, 0.030 over, Offy DP, Holley 4160/1848-1 465 cfm, Comp Cam 260H. P/P head, EFI exhaust manifolds, Walker Y Pipe, Super Cat, Turbo muffler, Recurved DSII, Mallory HyFire 6a, ACCEL Super Stock Coil, Taylor 8mm Wires, EFI plugs.

arse_sidewards
Registered User
Posts: 840
Joined: Mon Jan 21, 2013 7:18 am

Re: 175K miles - phenolyc cam gear

Post #6 by arse_sidewards » Sun Mar 29, 2015 12:12 pm

Lazy JW wrote:Ummm... warm that gear up on a hot plate to about 300 degrees F and it will slide right on there. Don't dilly-dally though, it shrinks tight pretty fast. And don't forget the little "wedding ring" spacer. I also put the cam in the deep freeze overnight and took it out just prior to installing.

They went to fiber gears a LONG time before 1987 :bang:
Joe


I thought they went to fiber with EFI

I've got over 200k (kinda hard to tell because I don't know the mileage on this engine, but just guessing based on the condition of the truck it came out of and what I've put on it) on my fiber gear. I've got a set of iron and steel gears but those won't go on until I do something with the cam, rebuild my spare core or the fiber gear fails, whichever happens first.
1994 F150 4x4 8ft, engine is basically stock.

66" leafs, extended radius arms, lockers in both ends, nothing special.

1986F150six
Registered User
Posts: 307
Joined: Wed Oct 24, 2012 3:11 pm
Location: Northwest Alabama

Re: 175K miles - phenolyc cam gear

Post #7 by 1986F150six » Mon Mar 30, 2015 6:58 am

My son's 1984 with fiber gear has over 220K miles and my 1986 with fiber gear has 183K. Both are driven without going over 3K RPMs, normally.

User avatar
tom954x4
Registered User
Posts: 476
Joined: Sun Nov 22, 2009 4:32 pm
Location: Twilight zone, WA

Re: 175K miles - phenolyc cam gear

Post #8 by tom954x4 » Mon Mar 30, 2015 9:32 am

After poking around a bit on the web, anecdotal evidence seems to indicate that like the fiber cam can fail anywhere from 100,000 miles to 200,000 miles (like Baron) but also it can last 300,000 miles or even more. Why would that be? driving habits? poor maintenance? the truck sitting for long periods?
1995 F-150 XL, 300-6, 4x4, ex-cab, sb, 3.08 5-speed, 2 1/2 in. exhaust w/flowmaster 50, MSDignition failed with no warning, now out, canopy, 179,000 + miles. Gone but not forgotten 1965 F-100 240 3spd lwb "the green hornet"; 1960 F-250 4x4, 223 six, 4sp with wrap-around rear window, two-tone paint, overhead camper.
Tow vehicle: 2012 F-250 4x4 6.7 diesel XLT s/c lwb

Harte3
VIP Member
Posts: 2643
Joined: Sat Oct 21, 2006 9:17 pm
Location: Spokane, WA

Re: 175K miles - phenolyc cam gear

Post #9 by Harte3 » Mon Mar 30, 2015 9:37 am

"Why would that be?" Variables and vicissitudes too numerous to catalog......
'83 F150 300, 0.030 over, Offy DP, Holley 4160/1848-1 465 cfm, Comp Cam 260H. P/P head, EFI exhaust manifolds, Walker Y Pipe, Super Cat, Turbo muffler, Recurved DSII, Mallory HyFire 6a, ACCEL Super Stock Coil, Taylor 8mm Wires, EFI plugs.

blmhawkeye
Registered User
Posts: 120
Joined: Mon Apr 15, 2013 9:46 pm
Location: Phoenix, Az

Re: 175K miles - phenolyc cam gear

Post #10 by blmhawkeye » Mon Mar 30, 2015 9:13 pm

My 69 f100 with the 240 had that paper gear. It lasted in my truck for about 38 years and 130k miles. when we went to replace it after it gave out it was practicaly shaved round for how much wear it had on it.

User avatar
worken2much
Registered User
Posts: 657
Joined: Sat Jan 31, 2004 9:01 pm

Re: 175K miles - phenolyc cam gear

Post #11 by worken2much » Fri Apr 10, 2015 9:33 am

I've had good luck pulling the cam gear while the cam is in the vehicle. I use a harmonic balacer puller with bolts passing through the two holes in the cam gear. Use oversize washers & nuts behind the cam gear. A propane torch with small tip will apply enough heat on the metal collar next to the cam that it will expand & allow gear to be removed without breaking. Don't use a jaw puller on the o.d. of the gear. It will break it, leaving you with little choice but to pull the cam, lifters, valve cover, etc.

Worken2much
Rule #1. Six Cylinder Racers Have Longer Cranks.
Rule #2. Unless your given name is Richard...don't be a dick.

turbo2256b
Registered User
Posts: 306
Joined: Wed Feb 10, 2010 10:02 pm

Re: 175K miles - phenolyc cam gear

Post #12 by turbo2256b » Fri Apr 10, 2015 11:58 am

Havent had a 300 240 for years but always used the aluminum cam gear and steel crank gear set up instead of fiber or steel cam gears.

User avatar
woodbutcher
VIP Member
Posts: 2052
Joined: Tue Mar 21, 2006 10:14 pm
Location: LaFollette Tn.

Re: 175K miles - phenolyc cam gear

Post #13 by woodbutcher » Sat Apr 11, 2015 6:10 pm

:hmmm: The best way that I have found to remove the cam gear if it breaks,is to use a Dremel tool or something similar to grind about 3/4 of the way through the hub,and then use a thin cold chisel inserted into the cut and LIGHTLY tap it with a small hammer.The hub will split and just about fall off.
Heat the new cam gear in a toaster oven at 350* for an amount of time that is appropreate and then slide it on the cam.No engine dis-assembly needed.
Good luck.Have fun.Be safe.
Leo
"People never lie so much as after a hunt,during a war,or before an election".
Otto von Bismarck

arse_sidewards
Registered User
Posts: 840
Joined: Mon Jan 21, 2013 7:18 am

Re: 175K miles - phenolyc cam gear

Post #14 by arse_sidewards » Sat Apr 11, 2015 6:20 pm

woodbutcher wrote::hmmm: The best way that I have found to remove the cam gear if it breaks,is to use a Dremel tool or something similar to grind about 3/4 of the way through the hub,and then use a thin cold chisel inserted into the cut and LIGHTLY tap it with a small hammer.The hub will split and just about fall off.
Heat the new cam gear in a toaster oven at 350* for an amount of time that is appropreate and then slide it on the cam.No engine dis-assembly needed.
Good luck.Have fun.Be safe.
Leo


You could grind all the way through where the key is since that's less metal you need to grind and you can replace the key.
1994 F150 4x4 8ft, engine is basically stock.

66" leafs, extended radius arms, lockers in both ends, nothing special.

User avatar
tom954x4
Registered User
Posts: 476
Joined: Sun Nov 22, 2009 4:32 pm
Location: Twilight zone, WA

Re: 175K miles - phenolyc cam gear

Post #15 by tom954x4 » Mon Apr 13, 2015 6:12 pm

Lots of good suggestions here. Thank you. What about removing the cover and visually inspecting the fiber gear - if I do that can I simply replace the cover with a new gasket? Someone told me that if you take the cover off you will have other gasket/seal issues to deal with.
1995 F-150 XL, 300-6, 4x4, ex-cab, sb, 3.08 5-speed, 2 1/2 in. exhaust w/flowmaster 50, MSDignition failed with no warning, now out, canopy, 179,000 + miles. Gone but not forgotten 1965 F-100 240 3spd lwb "the green hornet"; 1960 F-250 4x4, 223 six, 4sp with wrap-around rear window, two-tone paint, overhead camper.
Tow vehicle: 2012 F-250 4x4 6.7 diesel XLT s/c lwb

User avatar
mwilliamshs
Registered User
Posts: 215
Joined: Thu Apr 24, 2014 6:25 pm

Re: 175K miles - phenolyc cam gear

Post #16 by mwilliamshs » Sat Apr 25, 2015 1:38 am

two seals here.

1) seals timing cover to block. just a flat gasket with bolt holes

2) seals timing cover to crank. the front main seal.

Removing the cover requires removing all belts, the crank damper, and anything in the way of those parts. For me that includes the grille, condenser, radiator, fan, shroud, etc. No way I'd do that much work without replacing the gears while I was in there.
1989 E-150 Extended Body SuperVan Sportsmobile Camper Conversion 4.9L, C6, 3.08 R&P

User avatar
tom954x4
Registered User
Posts: 476
Joined: Sun Nov 22, 2009 4:32 pm
Location: Twilight zone, WA

Re: 175K miles - phenolyc cam gear

Post #17 by tom954x4 » Sat Apr 25, 2015 10:12 am

^^
Thats what I needed to know. Thanks
1995 F-150 XL, 300-6, 4x4, ex-cab, sb, 3.08 5-speed, 2 1/2 in. exhaust w/flowmaster 50, MSDignition failed with no warning, now out, canopy, 179,000 + miles. Gone but not forgotten 1965 F-100 240 3spd lwb "the green hornet"; 1960 F-250 4x4, 223 six, 4sp with wrap-around rear window, two-tone paint, overhead camper.
Tow vehicle: 2012 F-250 4x4 6.7 diesel XLT s/c lwb

Who is online

Users browsing this forum: mustang68200 and 23 guests