Perkins 4-107 Overhaul - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
 Not a Member? 

Diesel This is a new forum dedicated to diesel engines and their applicable accessories.


Like Tree3Likes
  • 1 Post By eherlihy
  • 2 Post By Mechsmith
Reply
 
LinkBack Thread Tools
  #1  
Old 03-24-2014
Irwin 32.5 Ketch
 
Join Date: Mar 2014
Location: New Britain
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
richace9 is on a distinguished road
Perkins 4-107 Overhaul

Ever hear of a Perkins 4-108? Sure you have, but how about his older, annoying self-entitled brother, the Perkins 4-107? It's like getting stuck with Payton Manning on your fantasy team, because you lost Eli in the first round. There are advantages to both, but I always thought age was the number one factor when it comes to performance... most of the time.

We'll that's what I got stuck with in my tub, the 4-107, so I'm going to try to make the most of it. I've learned a lot about this little guy. He actually has an attitude, so i'm going to try to make him happy this season with some upgrades that will take that pit out of my stomach every time I leave the dock.

This is a record of my winter project, working on the engine.
Attached Thumbnails
Perkins 4-107 Overhaul-photo.jpg  
Reply With Quote Share with Facebook
  #2  
Old 03-24-2014
Irwin 32.5 Ketch
 
Join Date: Mar 2014
Location: New Britain
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
richace9 is on a distinguished road
Re: Perkins 4-107 Overhaul

WTF am I Doing Here?

Itís winter 2014 in Connecticut and Iím on my 1972 Irwin 32.5 Ketch. Itís cold, but I only have a few months to get ready for my third season with the boat.

Letís start with the issues Iím having:

Rear Oil Seal:

Since day 1 Iíve had a slow oil leak near the rear of the engine. Easy enough, just drop a pan or bilge pad under it and change it out every few weeks. The leak started to get worse over time and then it became an actual issue. Motoring for just a few hours would dump at least a quart in the bildge. I got tired of shop vacuuming and scrubbing every time I came back from a trip.

Leaky Exhaust:

You know that burning in your nose and eyes every time you run into the galley for another drink? Well I realized thatís not normal and the 40 year exhaust system needs some changes. Mostly hoses, so weíll save that for last.

RUST:

Like a fungus, this stuff continues to spread. It didnít even look that bad three years ago, now itís EVERYWHERE! So as Iím removing parts, Iíll be inspecting cleaning and repainting as needed.

PARTS:

As most of you may already have noticedÖ the engine is over 40 years ago and from what I hear, they stopped making parts for the 107 back in the 80ís (not actual fact). So Iíve spent most of my time online and have identified a few places that have 4-107 parts.

Fuel System:

Nothing better than leaving the marina and having your engine die right as youíre navigating the mooring field. Air in the system, fuel cut off, whatever has been a problem for a while. Iím hoping itís the lift pump, which I actually did find a replacement for. If not itís the fuel pump and Iím not going to touch it until last, if needed.

Leaks:

And there are a number of random leaks around the engine that Iím hoping will be addressed when I replace the gaskets.

OBJECTIVES:

Iím going to address all of these issue in the next few months. Basically do an in boat overhaul without touching anything inside the block so I donít mess up the engine timing.
Reply With Quote Share with Facebook
  #3  
Old 03-24-2014
eherlihy's Avatar
Learning the HARD way...
 
Join Date: Jan 2007
Location: Boston Area
Posts: 3,384
Thanks: 95
Thanked 51 Times in 50 Posts
Rep Power: 8
eherlihy will become famous soon enough
Re: Perkins 4-107 Overhaul

Similar projects were started in another thread; Perkins 4.108M DIY Rebuild -- A Narrative

Sadly, the author fell into a black hole shortly after the project was completed. He never posted a final update, and we never found out if he was able to restart the beast.
richace9 likes this.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

USCG Licensed OUPV Captain, ASA 101/103/104/105 Certified Instructor - Also certified in Recreational Marine Electrical Systems


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Getting back onto the water after undergoing knee surgery.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #4  
Old 03-24-2014
Mechsmith
 
Join Date: Jun 2009
Location: Almost Heaven West Virginia
Posts: 197
Thanks: 1
Thanked 13 Times in 12 Posts
Rep Power: 6
Mechsmith is on a distinguished road
Re: Perkins 4-107 Overhaul

I feel like talkin. Hope you feel like readin.

First when you have an older motor lets see what you have as far as the hard parts are concerned.

Get the thing warmed up and take her out some. Then pull the oil filler cap and watch it. Bring it up to full load. There should be very little smoke and vapor coming out of there. If there is a lot coming out of there you have just determined that all the gaskets and seals won't help. That is good to know. There are cheap PCV testers at auto parts stores to give you a further clue. Any pressure from the combustion chamber that gets into the crancase is not good. Actually it's bad. A stuck or broken ring will let the fire down past the piston. There are a whole bunch of scenarios from there on. (none good) IF OK then---->

See if your compression is even. Take a piece of chalk (motor still warm) and mark your crankshaft pulley where the marks from the factory probably are. Then chalk 180degrees from that. Turn your motor over (with a ratchet wrench if necessary). Don't break the bolt off. As you turn the motor over as each mark approaches they should feel the same. Turn the motor at least twice on each mark. If you run into one that turns past the mark much more easily than the other ones you have a compression problem. If you have a compression problem don't bother with new gaskets etc!

If for some reason the main bearings are a bit loose the rear main seal will soon leak again. You can check this by putting the crankshaft 90deg off one of the marks and then moving the flywheel up and down. A dial indicater is nice to have and if you have one you can figure out how to use it. The flywheel should not move vertically more than .0025" That is 2 and1/2 thousands. The bearing wear in that type motor is mostly vertical. If you can see any difference pushing the flywheel from side to side as opposed to up and down you have a hard problem.

You can use an electric lift pump. About $40. If you need some more talk let me know.
You can fool around a long time with gaskets and seals without fixing very much if a hard part is worn out. (Rings,pistons,bearings,valves, sleeves etc.)
eherlihy and richace9 like this.
__________________
Seafarer 29 KCB
Reply With Quote Share with Facebook
The Following User Says Thank You to Mechsmith For This Useful Post:
eherlihy (03-25-2014)
  #5  
Old 03-25-2014
eherlihy's Avatar
Learning the HARD way...
 
Join Date: Jan 2007
Location: Boston Area
Posts: 3,384
Thanks: 95
Thanked 51 Times in 50 Posts
Rep Power: 8
eherlihy will become famous soon enough
Re: Perkins 4-107 Overhaul

Quote:
Originally Posted by Mechsmith View Post
I feel like talkin. Hope you feel like readin.

First when you have an older motor lets see what you have as far as the hard parts are concerned.
Great post - that earned you a rep point. That and $3 buys you a coffee at Starbucks.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

USCG Licensed OUPV Captain, ASA 101/103/104/105 Certified Instructor - Also certified in Recreational Marine Electrical Systems


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Getting back onto the water after undergoing knee surgery.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
The Following User Says Thank You to eherlihy For This Useful Post:
Mechsmith (03-25-2014)
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Where Can Get Perkins 4-107 Parts? CAPITAINMEMO Diesel 6 03-07-2011 11:54 AM
Perkins 4-107 trecksail Gear & Maintenance 9 02-02-2009 07:35 PM
Perkins 107 starter removal bsfree Gear & Maintenance 4 07-07-2007 05:04 PM
Perkins 4-107 Zincs Alden68 Gear & Maintenance 0 05-19-2007 07:40 PM
Perkins 4-107 tjkassen Gear & Maintenance 2 11-02-2004 01:38 PM


All times are GMT -4. The time now is 11:04 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.