4.107 or 4.108? Which do I have? - SailNet Community
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post #1 of 6 Old 07-21-2018 Thread Starter
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Question 4.107 or 4.108? Which do I have?

I cannot for the life of me figure out which Perkins I've got in my 1984 E40 nor can I find what i'm told the serial number looks like. Need to order parts. I definitely have either 4.108 or 4.107. The engine was rebuilt / replaced 6 years ago so it could be either. I have a few receipts from that, which do NOT say much other than things like "Rebuilt Engine". lol


These are the ONLY numbers I have found with pictures:

1. Right side (looking from front), between injector pump and oil pan gasket.
37112400
Z 2 L
MC 22260-1 (Partly pictured, right of first pic)


2. Just above bell housing / transmission
67147020-2
SG 7855-S
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post #2 of 6 Old 07-21-2018 Thread Starter
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Re: 4.107 or 4.108? Which do I have?

Well... I THINK I've found it. This helped immensely! https://youtu.be/dxgoP4-fohk

I was looking in the wrong place. Check this pic out. Best I could do at the angle, but it reads 108779 it might read 7108779 - but hard to tell if it's a 7 or a just a cut / damage to the metal. That is on top of the fuel injector pump mount to the block. Which according to video should be the right location.
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Re: 4.107 or 4.108? Which do I have?

Perkins has used 3 different serial number formats. This looks like the earliest (no letters). Page 4 of the shop manual (which you can download as a PDF) explains this.
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Re: 4.107 or 4.108? Which do I have?

Quote:
Originally Posted by kenr74 View Post
Perkins has used 3 different serial number formats. This looks like the earliest (no letters). Page 4 of the shop manual (which you can download as a PDF) explains this.

Funny thing about the shop manual. Look what I found on the boat (picture)! Number matches what's stamped on the engine. I saw this weeks ago and two things made me disregard it initially.


1. I'm on the phone with TAD (Trans Atlantic Diesel) and they swear that number is NOT a Perkins serial number at all.
2. My boat is a 1984. Could have sworn those were all Perkins 4.108s?

PS: yes, page 4 even has an example that looks just like my engine number.


How annoyed should I be that I thought I was buying a boat with 4.108? I'm pretty sure, they were actually the same block. All my parts look like 4.108 stuff from what little I know. Starting to think that when they did the rebuild of my engine 500 hours ago, it was a 4.107 block rebuilt as a 4.108. Sound about right? Would be nice to know for sure so I know what parts to order! Like, Valve Cover gasket, water pump rebuild kit just to name a few on my list.
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Last edited by maplemale; 07-21-2018 at 10:46 PM.
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Re: 4.107 or 4.108? Which do I have?

I am certainly no expert, I just became the owner of a 4.108 last fall. I Googled around, and no one anywhere that I can find has any information on those early serial numbers, not even the Perkins website. Like TAD told you on the phone, it is like they don't exist. Strange.
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post #6 of 6 Old 07-23-2018
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Re: 4.107 or 4.108? Which do I have?

they exist. the numbers are under the f i and stamped into engine. quite difficult to read. my rebuilder found mine with a microscope.


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