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by fp55scca
Thu Sep 19, 2019 10:13 am
Forum: Tech Questions and Advice
Topic: Crankshaft Part Numbers 124 Spider
Replies: 12
Views: 159

Re: Crankshaft Part Numbers 124 Spider

The division was not in 1974/75, but in the middle of the 1977 model year. That is when the nose of the crank, crank timing belt gear and crank pulley all changed. -------------------------------------------- --Csaba, right you are...my mistake. But what about crankshaft flywheel bolts? Didn't Fiat...
by fp55scca
Wed Sep 18, 2019 11:15 am
Forum: Tech Questions and Advice
Topic: Crankshaft Part Numbers 124 Spider
Replies: 12
Views: 159

Re: Crankshaft Part Numbers 124 Spider

--Brad, good stuff. Our numbers don't seem to match, particularly for 1608, and 1756cc cranks. I think we should sort this out, and then generate a listing of all known crankshafts, much as we did for head numbers years ago. --When a crankshaft was in an original motor, it was a relatively safe bet ...
by fp55scca
Wed Sep 18, 2019 11:01 am
Forum: Tech Questions and Advice
Topic: 1/2 tooth off timing belt options
Replies: 6
Views: 141

Re: 1/2 tooth off timing belt options

--Some have suggested I need to time the stock cams/crank if I'm using the adjustable wheels. You would seem to disagree. --rotating the intake cam counter-clockwise makes the intake valve open later which might tend to reduce power but improve fuel economy and reduce unburned HC. -----------------...
by fp55scca
Tue Sep 17, 2019 3:45 pm
Forum: Tech Questions and Advice
Topic: Crankshaft Part Numbers 124 Spider
Replies: 12
Views: 159

Re: Crankshaft Part Numbers 124 Spider

--This update includes a 2L (1995cc) casting #. Still need any 1438 #'s if available. --Good response here. I suspect Csaba's observation that part numbers may differ from casting numbers is probably correct. I'll try to verify some of this today. Here's what I have so far from the responses: ? - 1...
by fp55scca
Tue Sep 17, 2019 12:20 pm
Forum: Tech Questions and Advice
Topic: 1/2 tooth off timing belt options
Replies: 6
Views: 141

Re: 1/2 tooth off timing belt options

—Right Mike, that would be as viewed from the front. —I see the head gasket issue. Typically, a 2L head will serve to reduce compression a bit as well. —Just for clarity, there is no “setup” needed for adjustable cam wheels. Maybe you’re thinking of “timing the cams” which is another matter. With ad...
by fp55scca
Tue Sep 17, 2019 11:16 am
Forum: Tech Questions and Advice
Topic: Crankshaft Part Numbers 124 Spider
Replies: 12
Views: 159

Re: Crankshaft Part Numbers 124 Spider

--This update includes a 2L (1995cc) casting #. --Good response here. I suspect Csaba's observation that part numbers may differ from casting numbers is probably correct. I'll try to verify some of this today. Here's what I have so far from the responses: 4235063 - 1971-1973 - 1608cc 4238530 - 1973 ...
by fp55scca
Tue Sep 17, 2019 12:46 am
Forum: Tech Questions and Advice
Topic: Crankshaft Part Numbers 124 Spider
Replies: 12
Views: 159

Re: Crankshaft Part Numbers 124 Spider

—Thanks guys. Maybe we could post these numbers in the library for future reference?
by fp55scca
Tue Sep 17, 2019 12:24 am
Forum: Tech Questions and Advice
Topic: 1/2 tooth off timing belt options
Replies: 6
Views: 141

Re: 1/2 tooth off timing belt options

—Mike, advance the intake cam 1/2 tooth (counterclockwise) for now. Then order some adjustable pulleys. —You can actually remedy the situation with one adjustable cam pulley, so you could split a set with someone if you like. You don’t really need two. —Curious why you needed a thicker head gasket?
by fp55scca
Mon Sep 16, 2019 6:07 pm
Forum: Tech Questions and Advice
Topic: Timing Belt Tensioner Pivot Bolt-snapped
Replies: 10
Views: 134

Re: Timing Belt Tensioner Pivot Bolt-snapped

I looked in the Fiat Service manual and it states Tensioner nut. I think they are talking about the # 10 stud that the tensioner bearing is held in place with. I also think the threaded portion of the bolt you had break is #8. Other bolts this size would be torqued to 14 ft lbs in the Fiat Manual. ...
by fp55scca
Mon Sep 16, 2019 10:27 am
Forum: Tech Questions and Advice
Topic: Crankshaft Part Numbers 124 Spider
Replies: 12
Views: 159

Crankshaft Part Numbers 124 Spider

--Gentlemen, do we have a listing for crankshaft part numbers for the 124 Spider? I found this for 2L crankshafts: Year Part No. 1979-1982 5880944 1983-1985 5882102 --What about the others, 1438, 1608, 1592, and 1756? I believe the '73 1592 crankshaft also may be the same as the early 1756cc shafts ...