131 twin cam timing marks.

[mirafioriman]

Have scanned in this diagram to show the timing marks on a twin cam engine. Don't forget to line up the oil pump pulley wheel!

[Thotos]

The crankshaft pulley needs to be removed to change the belt (although Jason claimed he could do it without removing the pulley  ) There's a timing mark on the crankshaft cogged wheel that needs to be lined up with the mark on the crankcase. The marks can be seen in the photo below:

[mirafioriman]

It is a bit of a squeeze but you do not need to remove the crank pulley. At least not on my engine 

Thanks for posting this up it is to help our Panorama owning member in the Ukraine.

[mirafioriman]

Just checked my Haynes manual. Does not tell you to remove the crank pulley.

[simon131]

I've never had to remove the crank pulley either 

[Thotos]

I really can't see how you can change the belt without removing the crank fanbelt pulley  In all twin cams that I've changed belts, there's not enough room between the pulley and the sump to get the belt through without squeezing, bending  or stressing the belt. Plus there's the metal 'guide' next to the crankshaft cogged pulley as can be seen in the photo above. To get the belt behind the crank fanbelt pulley and onto the cogged pulley, you'll have to feed it in at 90 degrees to the cogged wheel and then bend the belt into place; not a good thing to do to a cambelt  Plus if you don't remove the fanbelt crank pulley, you can't see the crankshaft timing marks; the mark on the fanbelt pulley is for timing the ignition to the marks on the belt cover and the cover must be removed to change the belt.

[simon131]

I think you'll find that we never said that it wasn't better to remove the pulley, just that we don't It often takes longer to get the nut holding the pulley off than it does to change the belt and get the car restarted .

Yes, the belt needs a little manipulation, but I've never had to bend it to the point of thinking that it would cause undue stress to it. Blimey Theo, you know how paranoid I am about timing belts and their replacement

Luckily, I've never had a cam belt strip or snap on a TC engine (although I had one strip on a 128 1300) so when I have removed the belt I've always done it with all of the marks already lined up

[Bohdan]

It is a bit of a squeeze but you do not need to remove the crank pulley. At least not on my engine?

Thanks for posting this up it is to help our Panorama owning member in the Ukraine.

Dear Dave,

Thank you very much for your help and spending time helping me and my Panorama)) Hope the engine will work tomorrow or even today!!!!!

best regards and every sucsses,
Bohdan(131 panorama owner)

[Bohdan]

hello guys,

I noticed that my engine a bit different from yours. anyway some parts are the same))) please chech on pictures that i will download now if i lined up the marks properly.... is everything is ok or i should change smth???

Best regards

[Bohdan]

did the marks line up correctly?

[simon131]

Hi Bohdan,

Looks like you engine is the 'simpler' OHV (Over Head Valve) style of engine, as used in the likes of the series 1 cars and Series 2 L's and CL's

It looks to me as though the marks are in the correct place I hope it all works well.

Simon

[Thotos]

Yes that's an OHV engine and the timing marks seem aligned correctly.   

[theredx19]

Theo was scanning through some of my old workshop manuals for the 131's and you auxillary pulley is 1 tooth advanced as I checked it with the Fiat tool on another engine to make sure

[Thotos]

I think I see what you mean  In the photo of my engine the mark on the pulley's face looks at a different position than in the photo of Bohdan's OVH engine. But I am sure I would have lined up the marks when I did it. In any case, the auxiliary shaft 'timing' is not at all important in the twin cam engine. The Haynes manual says "make sure the hole in the pulley is pointing towards the tensioner spring bolt" (or words to that effect). If the auxiliary shaft, which is actually a camshaft from an OHV engine complete with lobes, is 180 degrees out then the lobes will hit the conrods but being slightly or even quite a long way out won't make much difference.

[theredx19]

Be wary of the "haynes book" the drilling on the aux pulley should be under to the right hand side of the m8*1.25 bolt on the tensioner as the fuel pump timing being incorrect can destroy the block on a twincam, this is one of there only weak spots known to man