boxer engine identification marks - Alfa Romeo Forum
You are currently unregistered, register for more features.    
 
Thread Tools
(Post Link) post #1 of 17 Old 16-07-01 Thread Starter
Status: -
 
Join Date: Jun 2001
Posts: 17
boxer engine identification marks

I have been offered a spare 8valve engine for my 33. It is said to be a 1.7 unit. How do I verify this?
dbhol is offline  
Sponsored Links
Advertisement
 
Status: -
AO Silver Member
 
Greek's Avatar
 
Join Date: Jul 2006
Location: Greece
County: -
Posts: 2,986
Re: boxer engine identification marks

A very simple sign is that the covers of the heads dont say Alfaromeo and the carbs are 40s....
Greek is offline  
Status: -
AO Member
 
Join Date: Feb 2007
Posts: 355
Re: boxer engine identification marks

the 100% way of confirming this is to look at the engine block, there is a number 87 cast into the block on the right hand side, almost central between the bores (right hand side when facing the front of the car, so passenger side for UK cars)

The 1500 block has 84 cast into it.

If the block is corroded, you will need to look hard, but it is there.

Some early 1700 engines in Sprints came with 36mm carbs.
veesix75 is offline  
Status: -
AO Platinum Member
 
David C's Avatar
 
Join Date: Aug 2003
Location: London, England
Posts: 29,975
Re: boxer engine identification marks

Quote:
Originally Posted by veesix75 View Post
Some early 1700 engines in Sprints came with 36mm carbs.
And some 1500 apparently came with 40mm carbs!

But yes the 87 or 84 marking is the safest.
David C is offline  
Status: -
AO Member
 
Join Date: Jun 2006
Posts: 108
Re: boxer engine identification marks

Not sure about this, but I think only the 1.7 engines had hydraulic tappets so do not have removable cam covers.

Al
alchemicalover is offline  
Status: -
AO Silver Member
 
Ben_NZ's Avatar
 
Join Date: Feb 2005
Location: Auckland, New Zealand
Posts: 1,468
Re: boxer engine identification marks

Quote:
Originally Posted by Greek View Post
A very simple sign is that the covers of the heads dont say Alfaromeo and the carbs are 40s....
The 1700 motors with hydraulic tappets still say Alfa Romeo on the cam covers, but the writing is much smaller.

Quote:
Originally Posted by David C View Post
And some 1500 apparently came with 40mm carbs!
Some 1700s (mine) came with 36mm carb-to-airbox elbows. Maybe I should check for that '87' marking...
Ben_NZ is offline  
Status: -
AO Silver Member
 
Join Date: Dec 2006
Location: Kidderminster
Posts: 1,465
Re: boxer engine identification marks

I think I found a section on the AlfaBB site that listed engine no's and the size and what it was fitted to it. try looking under Boxer engined Alfa Romeo's.
rsfruitbat
RSFruitbat is offline  
Status: -
AO Member
 
Join Date: Feb 2007
Posts: 355
Re: boxer engine identification marks

the 84 or 87 casting mark is guaranteed in confirming the engine size, there's no need to look up engine numbers
veesix75 is offline  
Status: -
AO Silver Member
 
Join Date: Dec 2006
Location: Kidderminster
Posts: 1,465
Re: boxer engine identification marks

So do 1350 engines have 80 cast in the top? Is it possible to tell a bare 16V block from an 8V one?
rsfruitbat
RSFruitbat is offline  
Status: -
AO Silver Member
 
Join Date: Dec 2006
Location: Kidderminster
Posts: 1,465
Re: boxer engine identification marks

In case anyone is interested I found this list which I thought was useful
Engine Number Identification-.
301.02 - Single carb Sud 1.2 63hp
301.04 - Sud 1.2 ti 68hp
301.02/S - Sud 1.2 60hp
301.84 - Sud 1.3 74hp
301.60 - Sud Super 1.35 70hp
301.64 - Sud 1.35 75hp
301.68 - Sud 1.35/Sprint 63hp
301.24 - Sud 1.5 ti/Sprint 83hp
301.28 - Sud 1.5 ti/Sprint 95hp
301.46 - Sud 1.5 ti/Sprint/33 105hp
310.00/305.00 - Arna 1.2 60hp
310.10/301.68 - Arna 1350 Gti 85hp
310.16/305.20 - Arna 1500 Gti 95hp
305.00 - 33 1.2 68hp
305.02 - 33 1.3 75hp
305.04 33 1.5 ti 84hp
305.20 33 1.5 ti 90hp
305.50 33/Sprint 1.7 114hp
305.58A - 33 1.7 ie Kat 105hp
307.43 33 1.2 78hp
307.32 33 1.3 86hp
307.34 33 1.5 105hp
307.50 33 1.5ie 96hp
307.51 33 1.5ie Kat 95hp
307.46 33 1.7 16v 137hp
307.36 33 1.7 ie 110hp
307.37 33 1.7 ie Kat 110hp
307.47 33 1.7 16v Kat 132hp
307.55 - 33 1.3/1.4 IE specific to Greece and runs the Bosch L-Jetronic 3.2
335.01 145/146 1.3i Kat 90hp
332.01 145/146 1.6i Kat 103hp
334.01 145/146 1.7i 16v Kat 129hp

rsfruitbat
RSFruitbat is offline  
Status: -
AO Platinum Member
 
David C's Avatar
 
Join Date: Aug 2003
Location: London, England
Posts: 29,975
Re: boxer engine identification marks

another one:
307.46 - 33 1.7 16v 137bhp
David C is offline  
kevjtd
Status: - Update
Guest
 
Posts: n/a
Re: boxer engine identification marks

Quote:
Originally Posted by RSFruitbat View Post
In case anyone is interested I found this list which I thought was useful
Engine Number Identification-.
301.02 - Single carb Sud 1.2 63hp
301.04 - Sud 1.2 ti 68hp
301.02/S - Sud 1.2 60hp
301.84 - Sud 1.3 74hp
301.60 - Sud Super 1.35 70hp
301.64 - Sud 1.35 75hp
301.68 - Sud 1.35/Sprint 63hp
301.24 - Sud 1.5 ti/Sprint 83hp
301.28 - Sud 1.5 ti/Sprint 95hp
301.46 - Sud 1.5 ti/Sprint/33 105hp
310.00/305.00 - Arna 1.2 60hp
310.10/301.68 - Arna 1350 Gti 85hp
310.16/305.20 - Arna 1500 Gti 95hp
305.00 - 33 1.2 68hp
305.02 - 33 1.3 75hp
305.04 – 33 1.5 ti 84hp
305.20 – 33 1.5 ti 90hp
305.50 – 33/Sprint 1.7 114hp
305.58A - 33 1.7 ie Kat 105hp
307.43 – 33 1.2 78hp
307.32 – 33 1.3 86hp
307.34 – 33 1.5 105hp
307.50 – 33 1.5ie 96hp
307.51 – 33 1.5ie Kat 95hp
307.46 – 33 1.7 16v 137hp
307.36 – 33 1.7 ie 110hp
307.37 – 33 1.7 ie Kat 110hp
307.47 – 33 1.7 16v Kat 132hp
307.55 - 33 1.3/1.4 IE specific to Greece and runs the Bosch L-Jetronic 3.2
335.01 – 145/146 1.3i Kat 90hp
332.01 – 145/146 1.6i Kat 103hp
334.01 – 145/146 1.7i 16v Kat 129hp

rsfruitbat
where do you find these numbers on the car or are they stamped on the engine or maybe part of the chassis number
 
Status: -
AO Silver Member
 
Join Date: Dec 2006
Location: Kidderminster
Posts: 1,465
Re: boxer engine identification marks

On oil filter side of engine, by the back face on the top you will see a raised metal "lug that has been machined flat. its about an inch by 3/4. Use a stanley knife blade to remove the 3mm depth of oil residue and the numbers should be there. Top row ties up with numbers listed earlier. Bottom row is your specific engine No.
Hope this helps

rsfruitbat
RSFruitbat is offline  
Status: -
AO Silver Member
 
Join Date: Dec 2006
Location: Kidderminster
Posts: 1,465
Re: boxer engine identification marks

Hi David C.
Sorry but didnt catch the drift of your reply? 307.46 is in the list.

On another note what made you convert to the "darkside".

Saw a few photo's of you rallying on BLS's website. Any hope of tempting you back.

rsfruitbat
RSFruitbat is offline  
Status: -
AO Platinum Member
 
David C's Avatar
 
Join Date: Aug 2003
Location: London, England
Posts: 29,975
Re: boxer engine identification marks

Quote:
Originally Posted by RSFruitbat View Post
Hi David C.
Sorry but didn't catch the drift of your reply? 307.46 is in the list.
Sorry I read the list several times and didn't see the .46 engine.
I can see it now though


Quote:
Originally Posted by RSFruitbat View Post
On another note what made you convert to the "darkside".

Saw a few photo's of you rallying on BLS's website. Any hope of tempting you back.
Darkside ?
I built the Sud to race in the Alfa championship but in 1991 the MSA changed the race licence requirements which meant that anyone that needed glasses to pass the eye test had to be able to read most of the eye test without glasses... (a strange requirement that nobody could understand) so I did a few tarmac rallies instead.
I'd had a chat with someone quite high up in the MSA during 1991 and for 1992 that strange without glasses eye test level was removed so I moved to the Alfa race championship. The two-wheeled pic was during my first Alfa Owners Club race in July 1992.

Finances at the moment mean that a racing return is unlikely, but I still help out with BLS at the Alfa races and also the EERC 24-hour, but I still get twitchy before the start of a race so if a huge bundle of cash suddenly arrived, I probably would race again.

David C

Audi TT 3.2v6 DSG
2012 Renault Twingo 1.2
xAlfa 156 Selespeed sp3 + Brembo conversion
Fiat Cinquecento 899cc
David C is offline  
Status: -
AO Silver Member
 
Join Date: Dec 2006
Location: Kidderminster
Posts: 1,465
Re: boxer engine identification marks

By "darkside" I meant racing. Pity the rally bug didnt catch you. How did it compare, Rallying and racing ?

rsfruitbat
RSFruitbat is offline  
Status: -
AO Member
 
dave33's Avatar
 
Join Date: Jan 2008
Location: Auckland, New Zealand
Posts: 62
Re: boxer engine identification marks

I have a spare 1.5 engine in the garage from a circa 87 33 Ti that appears to be a 305.88, not listed there, It came with 40mm Dellortos on it, apparently as standard.

Anyone know if this was a common configuration, or just the normal vagaries of life in the Alfa assembly plant ?
dave33 is offline  
Reply

Go Back   Alfa Romeo Forum > Supported Alfa Romeo Models > Technical & Vehicle Assistance > Engines (TS, JTS, JTD & V6)

Tags
boxer , engine , identification , marks

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
OBD II Codes Smaky Alfa 145 & 146 62 14-08-19 13:36

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

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