Register Login
FIAT Auto Specialist Team
Reply
 
Thread Tools Search this Thread
Old 06-05-2020   #1
Join Date: May 2020
Posts: 2
Thanks: 0
Trader Rating: 0
USA 
Question Fiat 850 Spider 1972 Piston Rod torque?

Hello, I'm new on this forum, I'm looking for help, I need to replace the piston rings on my Fiat 850 1972 engine type 100GBC 903cc and can't find the Torque specification for the rod piston bearing conector, really need your help thanks!
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

SQB10 is offline Reply With Quote Quote 
Old 07-05-2020   #2
Join Date: Jan 2020
Posts: 22
Thanks: 0
Trader Rating: 0
Ireland 
Re: Fiat 850 Spider 1972 Piston Rod torque?

Workshop manual looks to say 25.3 ft/lbs
Attached Thumbnails
Click image for larger version

Name:	Screenshot_20200507-171306_Drive.jpg
Views:	20
Size:	1.30 MB
ID:	208851  
Likes SQB10 liked this post
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

FR85 is offline Reply With Quote Quote 
Old 07-05-2020   #3
Join Date: May 2020
Posts: 2
Thanks: 0
Trader Rating: 0
USA 
Re: Fiat 850 Spider 1972 Piston Rod torque?

Really appreciate your help!! finally will finish this car , Thanks!
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

SQB10 is offline Reply With Quote Quote 
Old 07-05-2020   #4
Join Date: Jan 2020
Posts: 22
Thanks: 0
Trader Rating: 0
Ireland 
Re: Fiat 850 Spider 1972 Piston Rod torque?

It's for the Berlina/Sedan but I would assume they are the same.

Perhaps hold off until someone else confirms.....

Gav
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

FR85 is offline Reply With Quote Quote 
Old 10-05-2020   #5
Join Date: Jan 2014
Posts: 1,134
Thanks: 176
Trader Rating: 0
Ireland 
Re: Fiat 850 Spider 1972 Piston Rod torque?

I think 25 lb-ft is correct for the 843cc models but the 903cc engine (similar to what is used in the 127) needs 29 lb-ft of torque applied to the con rod (what you call a piston rod) bearing cap.

Also the flywheel torque (just in case you've removed it) is 33-36 lb-ft on the 903cc engine (28 lb-ft on the 843cc engine).

I don't have an 850 'shop manual to hand, I obtained these figures from a car service data manual, maybe someone who has a manual could check?

Al.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

F123C is offline Reply With Quote Quote 
Old 31-05-2020   #6
Join Date: Jan 2005
Location: Minneapolis, MN
Posts: 20
Thanks: 0
Trader Rating: 0
USA 
Re: Fiat 850 Spider 1972 Piston Rod torque?

The Haynes shop manual confrms that 25.3 ft. lbs of torque is correct for the 903cc 100GBC series engine connecting rod bearing caps.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

850 Dave is offline Reply With Quote Quote 
Reply
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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

Forum Jump
Similar Threads
Thread Thread Starter Forum Replies Last Post
(T) Piston connecting rod nut torque nm VitaPepe Punto (Mk1) 7 07-06-2017 20:33
(T) Wiring diagram 1972 Fiat 850 Sport a1969mach1man 500 (Classic) 0 25-05-2011 17:54