Calibrated Wire???

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spidernut
Posts: 1906
Joined: Wed Jan 25, 2006 12:20 am
Your car is a: 1979 Fiat Spider Automatic
Location: Lincoln, CA

Calibrated Wire???

Post by spidernut »

Does anyone know what "Calibrated Wire" is? I am installing new connecting rod bearings and the Fiat Manual has a reference to something I've never heard of before. It reads as follows:

"Place a length of calibrated wire on crankpin. Install connecting rod cap. Torque cap nuts to 38 ft. lbs. Remove caps. Compare width of wire with scale to determine clearance. Clearance should be .0008 to .0025 in."

There's a photo in the manual that does not help.

Anyone have some insight?
John G.
1979 Spider (Owned since 2000)
1971 124 Sport Spider (Owned since 2017)
1977 Spider (Sold 2017)
1979 Spider (Disposed of in 2017)
1979 Spider (Sold 2015)
1980 Spider (Sold in 2013)
1981 Spider (Sold in 1985)
2017 Spider (Owned since 2019)
djape1977
Posts: 985
Joined: Sat Apr 21, 2012 6:08 pm
Your car is a: 1970 fiat 124bc
Location: Belgrade, Serbia, eastern Europe

Re: Calibrated Wire???

Post by djape1977 »

another name for it is plastigauge
vandor
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Joined: Sat May 23, 2009 1:23 pm
Your car is a: 1971 124 Spider
Location: Texas, USA

Re: Calibrated Wire???

Post by vandor »

Plastigauge is available at most auto parts stores.
Csaba
'71 124 Spider, much modified
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81SPIDERMATT
Posts: 1239
Joined: Mon Oct 11, 2010 5:10 pm
Your car is a: 1981 spider 2000
Location: FORT COLLINS, CO

Re: Calibrated Wire???

Post by 81SPIDERMATT »

if you are like me.... plastigauge means about as much as calibrated wire the first time i heard it..... and just i case you are like me... what it is for is to check the clearance .... you put a little plastic rod in the spot tighten to spec and remove rod cap... the plastic will have squished or compressed ... with the plastigauge that you purchased will be a reference "ruler" for lack of a better word that you will match up to the squished plastic and that will tell your clearance ... sorry if i am over simplifying it ...but for me i had read several post about plastigauge before i found one that dumbed it down enough for me to actually understand
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