Perkins 4.108M DIY Rebuild -- A Narrative - Page 9 - SailNet Community
 89Likes
Reply
 
LinkBack Thread Tools
post #81 of 268 Old 02-11-2013
Maine Member
 
BELLATRIX1965's Avatar
 
Join Date: Jan 2007
Location: Penobscot Bay Maine
Posts: 175
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Wink Re: Perkins 4.108M DIY Rebuild -- A Narrative

Porf: Plus one on the kudos on your internal engine re-paint!
I suspect it is in better shape now than when it was built!
Rest up - there is a lot of nasty stuff going around!
BELLATRIX1965 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #82 of 268 Old 02-11-2013
Closet Powerboater
 
MedSailor's Avatar
 
Join Date: Mar 2008
Location: Anacortes PNW
Posts: 3,466
Thanks: 239
Thanked 107 Times in 97 Posts
Rep Power: 8
 
Re: Perkins 4.108M DIY Rebuild -- A Narrative

Porfin, thanks for such an awesome thread! I have a perkins 4.108 myself and I love to turn my own wrenches. In fact, after 12 years of owning old sailboats, I tried to hire a mechanic for the first time ever to do something and he actually didn't want to do the work.

Having said that I like to work on my engines, I've never done anything "inside" the engine. I have to say, now that I've seen you tear yours all the way down, that without a doubt, I am both more, and less intimidated than before...

Keep it coming!

MedSailor

I have a sauna on my boat, therefore I win.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MedSailor is offline  
Quote Quick Reply Share with Facebook
post #83 of 268 Old 02-12-2013
Senior Moment Member
 
SloopJonB's Avatar
 
Join Date: Jun 2011
Location: West Vancouver B.C.
Posts: 11,329
Thanks: 59
Thanked 65 Times in 62 Posts
Rep Power: 4
 
Re: Perkins 4.108M DIY Rebuild -- A Narrative

Quote:
Originally Posted by MedSailor View Post
Porfin, thanks for such an awesome thread! I have a perkins 4.108 myself and I love to turn my own wrenches. In fact, after 12 years of owning old sailboats, I tried to hire a mechanic for the first time ever to do something and he actually didn't want to do the work.

Having said that I like to work on my engines, I've never done anything "inside" the engine. I have to say, now that I've seen you tear yours all the way down, that without a doubt, I am both more, and less intimidated than before...

Keep it coming! MedSailor
He's got me wanting to do it again.

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
SloopJonB is offline  
Quote Quick Reply Share with Facebook
post #84 of 268 Old 02-12-2013
Senior Member
 
casey1999's Avatar
 
Join Date: Oct 2010
Location: HI
Posts: 3,257
Thanks: 18
Thanked 42 Times in 41 Posts
Rep Power: 5
 
Re: Perkins 4.108M DIY Rebuild -- A Narrative

Been following thread with interest.

Question: My Yanmar 3GMD engine is very rusty. Previous owner had a deck leak directly above the engine. Would be best to pull engine and repaint, but no time to do that in the near future. Would like to clean it up as best I can and paint to protect. Mainly just trying to stop or slow any further corrosion.

The block is cast iron and transmission is aluminum (as well as the engine drain pan). Exhaust and intake look to be cast iron. Plan to degrease engine, remove as much corrosion as I can mechanically, then paint from a spray can.

I have bought some Moeller engine paint, along with the Moeller Zinc Chromate Primer (says for aluminum), and Moeller Zinc Primer (says for steel/cast iron). Can I use the Zinc Chromate Primer on steel/cast iron? Moeller says to use the zinc primer for bare steel, but I doubt I can clean the rust off to bare steel.

Regards
casey1999 is offline  
Quote Quick Reply Share with Facebook
post #85 of 268 Old 02-12-2013
Senior Moment Member
 
SloopJonB's Avatar
 
Join Date: Jun 2011
Location: West Vancouver B.C.
Posts: 11,329
Thanks: 59
Thanked 65 Times in 62 Posts
Rep Power: 4
 
Re: Perkins 4.108M DIY Rebuild -- A Narrative

Quote:
Originally Posted by casey1999 View Post
Been following thread with interest.

Question: My Yanmar 3GMD engine is very rusty. Previous owner had a deck leak directly above the engine. Would be best to pull engine and repaint, but no time to do that in the near future. Would like to clean it up as best I can and paint to protect. Mainly just trying to stop or slow any further corrosion.

The block is cast iron and transmission is aluminum (as well as the engine drain pan). Exhaust and intake look to be cast iron. Plan to degrease engine, remove as much corrosion as I can mechanically, then paint from a spray can.

I have bought some Moeller engine paint, along with the Moeller Zinc Chromate Primer (says for aluminum), and Moeller Zinc Primer (says for steel/cast iron). Can I use the Zinc Chromate Primer on steel/cast iron? Moeller says to use the zinc primer for bare steel, but I doubt I can clean the rust off to bare steel.

Regards
Clean all the loose and flaking rust of then hit it with a rust converter before priming.

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
SloopJonB is offline  
Quote Quick Reply Share with Facebook
post #86 of 268 Old 02-12-2013
Senior Member
 
casey1999's Avatar
 
Join Date: Oct 2010
Location: HI
Posts: 3,257
Thanks: 18
Thanked 42 Times in 41 Posts
Rep Power: 5
 
Re: Perkins 4.108M DIY Rebuild -- A Narrative

Quote:
Originally Posted by SloopJonB View Post
Clean all the loose and flaking rust of then hit it with a rust converter before priming.
Good point. I forgot to mention I have some rust converter. Which primer should I use over the rust converter? I plan to use the Moeller engine paint as a top coat. The only primers they sell are the Zinc Chromate and the pure zinc (advertises as cold zinc paint). Is it ok to use the Zinc Chromate over the rust converter?
casey1999 is offline  
Quote Quick Reply Share with Facebook
post #87 of 268 Old 02-12-2013
Senior Moment Member
 
SloopJonB's Avatar
 
Join Date: Jun 2011
Location: West Vancouver B.C.
Posts: 11,329
Thanks: 59
Thanked 65 Times in 62 Posts
Rep Power: 4
 
Re: Perkins 4.108M DIY Rebuild -- A Narrative

Quote:
Originally Posted by casey1999 View Post
Good point. I forgot to mention I have some rust converter. Which primer should I use over the rust converter? I plan to use the Moeller engine paint as a top coat. The only primers they sell are the Zinc Chromate and the pure zinc (advertises as cold zinc paint). Is it ok to use the Zinc Chromate over the rust converter?
Couldn't tell you. I'd talk to a good industrial paint store or call the manufacturer. Personally I'd be surprised if it didn't - Zinc Chromate sticks to aluminium and that's about the fussiest substrate there is as far as bonding goes.
casey1999 likes this.

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
SloopJonB is offline  
Quote Quick Reply Share with Facebook
post #88 of 268 Old 02-16-2013 Thread Starter
Seņor Member
 
PorFin's Avatar
 
Join Date: Sep 2007
Posts: 1,444
Thanks: 8
Thanked 18 Times in 18 Posts
Rep Power: 8
 
Re: Perkins 4.108M DIY Rebuild -- A Narrative

Chapter 11: Getting Back Underway

After a bit of a break, I'm at it again. The time has come to start putting all the puzzle pieces back together.

Here's today's progress...

First, the tappets and cam went back in. All the red goop on the parts is engine assembly lube (you'll see a lot more of this later). The reason is to prevent galling when the engine is initially started, prior to the oil cycling through all the passages. If I were going to be firing Blue up in the next day or two, motor oil would have been fine. However, since she's gonna be sitting for a while yet, assembly lube's viscuous enough to stay in place much better than motor oil.



Next up was the crankshaft.



Now, being somewhat cautious I decided to do one more check before I torqued the main caps down for good. I used a little Plastigage to double check that the running clearances were not excessive (based on my initial measurements I wasn't worried, but you never know; they might have gotten a little heavy-handed when they were polishing the journals.)







All good to go -- time to move on.

Next was assembling the pistons. My camera battery soiled the sheets, so I don't have any shots of attaching the heads to the cranks. I had to break out the heat gun to warm up components so the wrist pins would slide into the piston head and through the small end bearings -- again, I used a healthy coating of assembly lube on the moving parts.

Installed the rings:





And got ready to install the pistons in the block:



Before installing the pistons, I lubed the inside of the cylinders with ATF. Again, oil probably would have been OK, but ATF supposedly has a few advantages: It won't gunk up the ring grooves, the ATF will burn away a little cleaner, and the ATF will burn away faster which will speed up getting the rings seated.

Anyway, nothing fancy about this...







I didn't take any pictures, but I also took Plastigage measurements of the crank bearing running clearances as well -- once again, all is good.

More tomorrow.
jrd22 and Faster like this.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
________
'85 BYB Vagabond 39
PorFin is offline  
Quote Quick Reply Share with Facebook
post #89 of 268 Old 02-16-2013
Closet Powerboater
 
MedSailor's Avatar
 
Join Date: Mar 2008
Location: Anacortes PNW
Posts: 3,466
Thanks: 239
Thanked 107 Times in 97 Posts
Rep Power: 8
 
Re: Perkins 4.108M DIY Rebuild -- A Narrative

A co-worker of mine rebuilt an engine, and being the exacting fellow he was, he aligned all the splits in the rings so they looked nice. He found out the hard way that you're supposed to stagger the ring splits or oil and compression can sneak past. He was pissed when his newly rebuilt engine was burning oil.

MedSailor

I have a sauna on my boat, therefore I win.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MedSailor is offline  
Quote Quick Reply Share with Facebook
post #90 of 268 Old 02-17-2013
Senior Member
 
bljones's Avatar
 
Join Date: Oct 2008
Location: South Coast Ontario
Posts: 8,468
Thanks: 35
Thanked 89 Times in 80 Posts
Rep Power: 8
   
Re: Perkins 4.108M DIY Rebuild -- A Narrative

nice piston alignment, and good pics of the plastigauge in action.

It's 5 o'clock somewhere:


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
bljones is offline  
Quote Quick Reply Share with Facebook
Reply

Tags
diesel , diy , engine , perkins , rebuild

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Perkins 4-108M Switch details pbanderson Introduce Yourself 4 04-05-2013 03:03 PM
Perkins 4108 Rebuild Ilenart Diesel 4 02-13-2010 11:32 PM
rebuild perkins 4-108 gavinandrebecca Gear & Maintenance 12 12-14-2007 11:41 AM
Perkins 4-108M 50HP overheating. CharlieCobra Gear & Maintenance 19 10-12-2007 12:43 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome