gus

iTrader: (1)

im having issues with cam lobe wear and thinking this could help

anyone had it done?

pro's and con's please

is there any other options to prevent this?

roller lifter? but then i think you need a cam spec'd for roller lifters

Christian and Beccy

iTrader: (14)

Roller lifters - No.

Unfortunately, CVH cam wear is just part of the territory. Try what I told you last night, forget the coating IMO. Trouble is, it's not cheap and it's agro each time you want to try a different cam or whatever.

I think it's down to the precision of the fitting and setting up, along with spring pressures. You need to look at both of those.

Big Will_

Would it be worth having a decent machinist modify your cam to include a small diameter hole down the centre of cam and the lobe to act as an oil gallery and provide direct lubrication to the cam and the lifter to reduce wear?

gus

iTrader: (1)

yeah i know

im just trying to get a bit of info on it so i know whats what

found a few bits on the net

just wondering who else has experience with it

all the info you gave me has been taken on board and i thank you for it

gus

iTrader: (1)

i think someone already does this, i seen a picture on here of it

think it was a schrick cam


hhmmmmmm

gus

iTrader: (1)

https://passionford.com/forum/restor...with-clay.html

half way down the page

you can just see what looks like a small hole, would this be what you mean will?

hows that profile sound mr c?

Christian and Beccy

iTrader: (14)

I think over-springing is the main issue. Don't look at it too hard Gus. You need to use a cam setup that is easily replaced. Even if you do everything right, you will still need a replacement from time to time, so using parts that are easier to get is the way. Just with some decent single springs. With solids, you just don't need to be so over the top with stuff.

Mine revved to 7400rpm with no problems on single springs.

S1

I dont know if it's ever a problem on a CVH but it's not due to something as simple as coil bind? Have you checked the spring clearance at full lift?

tabetha

Why not just put back what is missing, and what caused/aggravated the issue in the first place, ZDDP.
tabetha

dug112y

iTrader: (1)

i have had stuff done in the past, its amazing stuff. will be getting it done again on cam and followers at least.

gus

iTrader: (1)

sorry not following

please explain

tabetha

ZDDP, is Zinc Dialkyl Dithio Phosphate,
in english it is a anti wear additive, whose level has been lowered over the years, it is a amazing anti scuff additive put in oils and was the "cure" for OHC wear issues formulated years ago for this exact problem, you can but bottle of ZDDP to add to your oil.
The reduction in ZDDP has come about for many reasons, mainly environmental, but with ever better oils it's use in most engines was not so necessary in the concentration used, unfortunately there are exceptions like the CVH cam cruncher.
From personal use I can recommend ZDDP plus as a good additive.
Another option would be to stop wasting money on oils that are fossil fuel based, filling with synlube, would stop a lot of the wear, it is ONCE only oil fill, proved the world over since the early 70's, but is costly, around £250-£300 to fill the sump.
Failing that look at "classic" fully synthetic oils, they may contain elevated ZDDP.
tabetha

jammerrs

pmsl at cvh cam crusher

can this synlube be used in any car?

JonnyBravo

Fit a Zetec

Simples !

tabetha

Yes any engine, also do one oil for life for diffs boxes etc, along with ultra fine particle exclusion oil filters.
tabetha

-beefy-

iTrader: (6)

gus wasnt there a in depth issue about fitting roller lifters/rockers to a cvh head int he rst room


sure karlos g was looking into it



beef

gus

iTrader: (1)

i have been told by a few people now to forget about the roller lifters

zetec are not exactly trouble free are they, yep head is fine but oil pump will give

cheers for that tabetha, will mention that when im back down there