Boatmad.com


Reply
 
Thread Tools Display Modes
 
Old 19-07-2006, 11:41 PM   #1
Registered User
 

Join Date: Mar 2004
Posts: 6,862
Cam Breakin

Have been looking in to choosing an oil to use for breaking in a new cam. Wouldn't normally have given it a 2nd thought, other than have spotted a lot of rumours over the years suggesting using mineral oil for breaking in a new cam, including recomendations by some cam manufacturers, but consistely without any technical evidence to back it up.

All my mota's (even the little generator) run fully synthetic, so I'm reluctant to chuck out 50+ kwids worth of oil that has about 10 minutes run time on it unless there's a good reason to.

Anyway, I asked mobil, and they reckon you can run a motor in without any problems using fully synthetic oil.

So I have to ask - what is the big deal that everyone seems to go on about using mineral oil to break in a new cam? Is it just an urban myth.
__________________

Matt is offline   Reply With Quote
Old 19-07-2006, 11:53 PM   #2
numbskull
 
Jon Fuller's Avatar
 
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast

Join Date: Mar 2004
Location: South
Posts: 15,959
Dunno, never heard it!

Only ever religeously coated journels with molybdonum dysulphide grease (sp), pre-lube using cordless drill through dizzy 'ole' and ensured first 30 mins are run above 2000rpm.

never once had a problem. Though the only big pig iron I've ever run fully synthetic in, was the 502 efi (600+hp) in our race boat.
__________________

__________________
.

"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
Jon Fuller is offline   Reply With Quote
Old 19-07-2006, 11:58 PM   #3
jw.
Registered User
 
jw.'s Avatar
 
Location: Scotland
Interests: Hole maker
Boat make: Humber Ocean Offshore
Engines: KAD 300/DPX

Join Date: Mar 2004
Location: Scotland
Posts: 954
I'd never heard of it either. I always used gear oil when building the engine and then, like Jon, kept the revs up for a while to provide plenty of splash.


Edit. I just remembered a conversation I had with a lady Techie at Castrol a few years ago. She reckoned mineral oil was still (then) a better lubricant than a synthetic oil but the synthetic's benefit was it's ability to stand high temperatures. Things may have changed nowadays. But maybe it's not just a myth.

Second edit. Piper used to sell a special lube for coating their cam lobes during initial build.
__________________
JW.
jw. is offline   Reply With Quote
Old 19-07-2006, 11:59 PM   #4
Registered User
 
Tony Davis's Avatar
 
Country: Job Centre
Location: In a box
Occupation: Chaos's gofer
Interests: Skiving
Boat make: Spectre 30
Engines: 2 x Promax 225
Cruising area: In the bath

Join Date: Mar 2004
Location: In a box
Posts: 5,201
Quote:
Originally posted by Jon Fuller
s the 502 efi (600+hp) in our race boat.
Minimum.... probably more like 800
__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 19-07-2006, 11:59 PM   #5
Registered User
 

Join Date: Mar 2004
Posts: 6,862
I totally accept it's overkill to use synthetic at all - but it keeps me happy.
Matt is offline   Reply With Quote
Old 19-07-2006, 11:59 PM   #6
Registered User
 

Join Date: Mar 2004
Posts: 6,862
With factory support!!

Quote:
Originally posted by Tony Davis
Minimum.... probably more like 800
Matt is offline   Reply With Quote
Old 20-07-2006, 12:00 AM   #7
Registered User
 
Tony Davis's Avatar
 
Country: Job Centre
Location: In a box
Occupation: Chaos's gofer
Interests: Skiving
Boat make: Spectre 30
Engines: 2 x Promax 225
Cruising area: In the bath

Join Date: Mar 2004
Location: In a box
Posts: 5,201
Quote:
Originally posted by Matt
With factory support!!
and bow tank!
__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 20-07-2006, 12:01 AM   #8
Registered User
 
Tony Davis's Avatar
 
Country: Job Centre
Location: In a box
Occupation: Chaos's gofer
Interests: Skiving
Boat make: Spectre 30
Engines: 2 x Promax 225
Cruising area: In the bath

Join Date: Mar 2004
Location: In a box
Posts: 5,201
Quote:
Originally posted by Matt
With factory support!!
I believe JF used a surgical support!
__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 20-07-2006, 12:01 AM   #9
numbskull
 
Jon Fuller's Avatar
 
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast

Join Date: Mar 2004
Location: South
Posts: 15,959
Quote:
Originally posted by Matt
it keeps me happy.
Fookin ell! it must be amazing! I'll start using it imediately
__________________
.

"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
Jon Fuller is offline   Reply With Quote
Old 20-07-2006, 12:02 AM   #10
The Doc
 
Captain Chaos's Avatar
 

Join Date: Mar 2004
Posts: 8,265
not to mention all the exotic materials!
Captain Chaos is offline   Reply With Quote
Old 20-07-2006, 12:03 AM   #11
numbskull
 
Jon Fuller's Avatar
 
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast

Join Date: Mar 2004
Location: South
Posts: 15,959
Quote:
Originally posted by Tony Davis
I believe JF used a surgical support!
You'll need a fkkn surgical support in a minute sonny! you'll have ya eye in a sling!
__________________
.

"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
Jon Fuller is offline   Reply With Quote
Old 20-07-2006, 12:03 AM   #12
Registered User
 
Tony Davis's Avatar
 
Country: Job Centre
Location: In a box
Occupation: Chaos's gofer
Interests: Skiving
Boat make: Spectre 30
Engines: 2 x Promax 225
Cruising area: In the bath

Join Date: Mar 2004
Location: In a box
Posts: 5,201
Quote:
Originally posted by Captain Chaos
not to mention all the exotic materials!
Yeh, Bri nylon and gingham! Jonni always looked cute though!
__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 20-07-2006, 12:03 AM   #13
Registered User
 

Join Date: Mar 2004
Posts: 6,862
Ere you go:
http://www.compcams.com/Technical/In.../Files/145.pdf
http://www.cranecams.com/pdf/214e.pdf

Both say don't use synthetic - but I can't find any credible reason why.
Matt is offline   Reply With Quote
Old 20-07-2006, 12:04 AM   #14
The Doc
 
Captain Chaos's Avatar
 

Join Date: Mar 2004
Posts: 8,265
Quote:
Originally posted by Matt
- but it keeps me happy.
so you've given up on the jazz mags & varius hoover attatchments then?
Captain Chaos is offline   Reply With Quote
Old 20-07-2006, 12:05 AM   #15
Registered User
 

Join Date: Mar 2004
Posts: 6,862
Drink a cupful every morning and evening - your days will be neverending happiness, although it does have rather a lubricating effect on yer innards.

Quote:
Originally posted by Jon Fuller
Fookin ell! it must be amazing! I'll start using it imediately
Matt is offline   Reply With Quote
Old 20-07-2006, 12:05 AM   #16
Large member
 
Country: England
Location: On the farm
Occupation: General Trouble Causer Salterns Boatyard
Interests: Official smartass
Boat name: Seahorse.org
Boat make: a V24 and a SLOW unstable ICE Bladerunner
Engines: 2x300 promax, 320 Volvo
Cruising area: England/France & Med

Join Date: May 2005
Location: On the farm
Posts: 2,681
Magnatec is supposedly good breaking in oil..
verytricky is offline   Reply With Quote
Old 20-07-2006, 12:06 AM   #17
The Doc
 
Captain Chaos's Avatar
 

Join Date: Mar 2004
Posts: 8,265
Quote:
Originally posted by Tony Davis
Yeh, Bri nylon and gingham! Jonni always looked cute though!
yeh & I always wondered how he got the studded-cap past the RYI in place of a helmet!
Captain Chaos is offline   Reply With Quote
Old 20-07-2006, 12:07 AM   #18
Registered User
 
Tony Davis's Avatar
 
Country: Job Centre
Location: In a box
Occupation: Chaos's gofer
Interests: Skiving
Boat make: Spectre 30
Engines: 2 x Promax 225
Cruising area: In the bath

Join Date: Mar 2004
Location: In a box
Posts: 5,201
Quote:
Originally posted by verytricky
Magnatec is supposedly good breaking in oil..
Yeh, as used by Gary Glitter.
__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Old 20-07-2006, 12:07 AM   #19
Registered User
 

Join Date: Mar 2004
Posts: 6,862
Magnatec is a mineral oil

Quote:
Originally posted by verytricky
Magnatec is supposedly good breaking in oil..
Matt is offline   Reply With Quote
Old 20-07-2006, 12:08 AM   #20
Registered User
 
Tony Davis's Avatar
 
Country: Job Centre
Location: In a box
Occupation: Chaos's gofer
Interests: Skiving
Boat make: Spectre 30
Engines: 2 x Promax 225
Cruising area: In the bath

Join Date: Mar 2004
Location: In a box
Posts: 5,201
Quote:
Originally posted by Captain Chaos
yeh & I always wondered how he got the studded-cap past the RYI in place of a helmet!
In the words of M Pascoe, a small contribution to the club!
__________________

__________________
Chaos for Moderator.
Tony Davis is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT +1. The time now is 11:08 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×