|
|
16-01-2011, 10:50 PM
|
#1
|
Registered User
Join Date: Mar 2004
Posts: 6,891
|
Regrind?
Can anyone advise whether this journal is usuable, or whether it should be reground. Other than the slight pitting shown (it's not deep, but you can detect it with your fingernail), it's in good order and measures within spec.
Thanks
Matt
__________________
|
|
|
16-01-2011, 11:11 PM
|
#2
|
wiggy808
Country: Southampton
Location: Southampton
Occupation: Marine Engineer
Interests: wakeboarding, power boats, 900hp Audi
Boat name: Marshan19
Boat make: Marshan 19, Mirage 22
Engines: Mariner 200, 2.2 5cyl Audi
Cruising area: Solent
Join Date: Nov 2007
Location: Southampton
Posts: 133
|
What crank is it Matt? I've rebuilt many engines where the journals were not perfect and the owner wouldn't shell out for a new crank or re grind. Often they've been fine........sometimes not so.
If it's on rollers then it may last, if it's on shells probably not.
Chris
__________________
|
|
|
16-01-2011, 11:14 PM
|
#3
|
Registered User
Join Date: Mar 2004
Posts: 6,891
|
It's a rod journal off a big block chevy
|
|
|
16-01-2011, 11:33 PM
|
#4
|
Registered User
Country: Guernsey
Occupation: Engineer
Interests: Restoration
Cruising area: Channel Islands & northern French coast
Join Date: Jan 2009
Posts: 154
|
Could just the photo but the journal appears to be blued and that suggests a load of heat.
It looks to me like it needs a grind, sorry
To be sure, take it to your local engineers for a measure...most will do this for free. If you have a micrometer simply compare a good journal with the pitted one.
Standard size is 2.199" - 2.200" if that helps
|
|
|
16-01-2011, 11:35 PM
|
#5
|
Registered User
Join Date: Mar 2004
Posts: 6,891
|
It's not blue - that's just my poor photo taking skills.
The journal itself measures bang on spec, even over the pitted area.
|
|
|
17-01-2011, 02:48 AM
|
#6
|
wiggy808
Country: Southampton
Location: Southampton
Occupation: Marine Engineer
Interests: wakeboarding, power boats, 900hp Audi
Boat name: Marshan19
Boat make: Marshan 19, Mirage 22
Engines: Mariner 200, 2.2 5cyl Audi
Cruising area: Solent
Join Date: Nov 2007
Location: Southampton
Posts: 133
|
Shells then!! The pitted area will remove white metal very quickly. Better get it reground and some non standard shells. Better to be safe.
|
|
|
17-01-2011, 04:10 AM
|
#7
|
living the dream
Country: Fl. USA
Location: Where the sun never dies
Occupation: Life Artist
Interests: BOAT RACING
Boat name: i call her baby
Boat make: Aero-tek
Engines: a lot of horses
Cruising area: WW
Join Date: Apr 2010
Location: Where the sun never dies
Posts: 453
|
if its not really a high performance crank, u can by a stock size eagle crank new for the same amount of money that u would spend on grinding this one.
but either way, u need to replace or fix it and not use as is .
__________________
Not as bad as you think i am, just different !
|
|
|
17-01-2011, 08:44 AM
|
#8
|
Registered User
Country: UK
Join Date: Jun 2006
Posts: 1,237
|
"High performance boats" need "high performance journals" Matt.
Unless you like rebuilding motors?
|
|
|
17-01-2011, 09:18 AM
|
#9
|
..
Join Date: Jun 2004
Posts: 1,567
|
Quote:
Originally Posted by Matt
it's not deep, but you can detect it with your fingernail
Thanks
Matt
|
its a lot cheaper to do it now than after after a couple of hrs on the water when its let you down,
|
|
|
17-01-2011, 09:42 AM
|
#10
|
numbskull
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
|
If I could feel it, I'd grind it, no question.
Lots to lose if you don't and turn out to be wrong. ...Are they currently std journal dia?
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
17-01-2011, 09:50 AM
|
#11
|
Registered User
Join Date: Mar 2004
Posts: 6,891
|
I am veering towards JFDI, for all the reasons noted above.
But at the same time, I do want to sanity check, because a regrind on a journal uses up a "life", and on overall diameter even over the damaged area, journal ovality, etc, all meets spec.
Jon H - is there such a thing as a high performance big block motor?
Jon F - Yeh, all currently standard.
ETA - I think decision made - it's gonna get done.
|
|
|
17-01-2011, 11:48 AM
|
#12
|
Engine tester
Country: united kingdom
Location: Southend on Sea
Occupation: Construction
Interests: Gin & Women
Boat name: motorvator
Boat make: Revenger San Marino / Sunseeker Camargue 46 / Phantom 18/19/600
Engines: 502 mercruiser / Detroit 550s / 115 ProXS / Anything Borrowed
Cruising area: Thames, Southend
Join Date: Nov 2006
Location: Southend on Sea
Posts: 1,021
|
Without question a regrind Matt but have you found out why it picked up in the first place?
I'd get the shop to check over the whole rotating set when you regrind, check the line bore of the block and throw the oil pump out, they're too cheap not to just replace. Also replace the relief valves but make sure you get the right ones.
Then bear in mind how many places in the oil lines there are to trap some shite, remote filters, lines, coolers etc.
__________________
"Lend us a motor Chaos"
|
|
|
17-01-2011, 11:53 AM
|
#13
|
wiggy808
Country: Southampton
Location: Southampton
Occupation: Marine Engineer
Interests: wakeboarding, power boats, 900hp Audi
Boat name: Marshan19
Boat make: Marshan 19, Mirage 22
Engines: Mariner 200, 2.2 5cyl Audi
Cruising area: Solent
Join Date: Nov 2007
Location: Southampton
Posts: 133
|
I think , looking at the picture that it's corrosion not marks from it picking up.
|
|
|
17-01-2011, 11:59 AM
|
#14
|
Engine tester
Country: united kingdom
Location: Southend on Sea
Occupation: Construction
Interests: Gin & Women
Boat name: motorvator
Boat make: Revenger San Marino / Sunseeker Camargue 46 / Phantom 18/19/600
Engines: 502 mercruiser / Detroit 550s / 115 ProXS / Anything Borrowed
Cruising area: Thames, Southend
Join Date: Nov 2006
Location: Southend on Sea
Posts: 1,021
|
Same principle applies Wiggy, determine the cause to ensure you're not throwing good money after bad. Bitter experience
__________________
"Lend us a motor Chaos"
|
|
|
17-01-2011, 12:33 PM
|
#15
|
Registered User
Join Date: Mar 2004
Posts: 6,891
|
I think the cause is understood - it's sat on a garage floor for 15 years and a bit of moisture got to it.
|
|
|
17-01-2011, 12:44 PM
|
#16
|
Engine tester
Country: united kingdom
Location: Southend on Sea
Occupation: Construction
Interests: Gin & Women
Boat name: motorvator
Boat make: Revenger San Marino / Sunseeker Camargue 46 / Phantom 18/19/600
Engines: 502 mercruiser / Detroit 550s / 115 ProXS / Anything Borrowed
Cruising area: Thames, Southend
Join Date: Nov 2006
Location: Southend on Sea
Posts: 1,021
|
Feck me is that how long you've been working on the Arrow.
__________________
"Lend us a motor Chaos"
|
|
|
17-01-2011, 02:08 PM
|
#17
|
Registered User
Country: UK
Join Date: Jun 2006
Posts: 1,237
|
Matt, journals can be "polished" but only if the damage is very light. It really needs examining by an engineering shop to determine the best remedy.
Personally, considering the amount of work you are putting into the Arrow, do it once and do it right.
Now, get your hand in your pockets laddie boy!
|
|
|
17-01-2011, 02:20 PM
|
#18
|
Registered User
Join Date: Mar 2004
Posts: 6,891
|
It's not a corner cutting financial consideration, I just don't want to sacrifice a life off the journal if I don't need to. Your 2nd line is spot on, it will be getting reground.
|
|
|
17-01-2011, 02:21 PM
|
#19
|
Registered User
Join Date: Mar 2004
Posts: 6,891
|
P.S. The spec of the rest of the motor parts confirms my dick is firmly in the custard.
|
|
|
17-01-2011, 03:34 PM
|
#20
|
Registered User
Join Date: Mar 2004
Posts: 1,016
|
pro·cras·ti·nate (prō-krăsˈtə-nātˌ, prə-)
verb procrastinated pro·cras·ti·nat·ed, procrastinating pro·cras·ti·nat·ing, pro·cras·ti·nates
verb, intransitive
To put off doing something, especially out of habitual carelessness or laziness.
verb, transitive
To postpone or delay needlessly.
.....stop asking daft questions Streak'o........."Is it ****ed?"
Does it look ****ed? Does it feel ****ed?...then it's ****ed....Duuuh!
__________________
__________________
“Never try to wrestle a pig” ™ The Sparkler Prefect
|
|
|
|
|
Thread Tools |
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|