problems with start up

[mario-jnr]

hi all have been rebuilding a 1300 gt junior long story short paint done brakes done converted a 116 2ltr to adapt a 105 all good untill i just tried to start it got a mechanical noise on cranking looked under the car and saw a bunch of metal fillings,damm looks like the flywheel is grinding the bellhousing now when i built the engine i used a flywheel i got from the states it was from a late model fuel injection motor question are these flywheels larger slightly or is my gearbox bellhousing at fault thanks any opinions 

[Jekyll and Hyde]

Did you use the 1300 starter motor on the 2 litre?  Some starters have 8 teeth, some have 9 (IIRC).  From memory, the 9 tooth version is more common, found on later 1750s (I think), and most 2 litres (including alfetta etc).  The starter should match the flywheel, otherwise it won't mesh correctly.  Given that you have to stick with the flywheel you've got, you'd need a 2 litre starter motor if this is where you've gone wrong.

[Neil Choi]

Just to add (from recent personal experience) if it is a mismatched starter/flywheel.

J&H is correct and match flywheel to starter, also in regards to the 9 teeth starter motor, beware 2L are 9 teeth but as is 1.8L or 1750 are also 9 teeth, but 2L vs 1.8L/1750 are different pitch.

So despite 9 teeth, you will definitely want a 2L and don't go with 1.8L (which I think are 105 ones I think) or 1750 one.

I mistakenly installed a 2L s/m to a 1.8L flywheel and it did not work and broke the starter.

Neil

[mario-jnr]

thanks for your quick responses i have 2 starter motors one that came out of the 116 2ltr and another i picked up from milano spares i carnt remember which one i am using in the car now.
so just to get things straight you all think its a mismatched starter to flywheel that would explain why it would tend to "lock" after cranking for 5 seconds it would feel and sound like it hit a block and then the starter would wind but not crank the engine but from memory both are 2ltr starters is the 116 starter not a match with the 105 ringgear

[Jekyll and Hyde]

is the 116 starter not a match with the 105 ringgear

That I can't remember, whether there is a difference between 116 2 litre starter and 105 2 litre starter....  Easy way to check, pull the starter out and turn the motor over by hand.  If it keeps turning freely, its probablly a starter mismatch.  If it jams, something else is going on.

[Neil Choi]

It seems very likely a mismatch.

Start motor specs listed below:

105 series 1964-74 and some GTV with 9 Tooth x 25mm Pinion

105 series 1964-74 series 2 1750 GTV. 8 Tooth x 27mm Pinion

105 series with 2ltr engine. 8 Tooth x 27mm Pinion

Alfetta 116 series 1972-86. 9 Tooth x 29mm Pinion

So you need to know what the flywheel was off and get the matched start motor.  Different pitch and tooth combinations.

Neil

[mario-jnr]

ok today i pulled the motor out and as i origionaly thought the flywheel was grinding the bellhousing i compared it with a 105 2ltr flywheel and its larger in the ringgear by posibly 2mm.i compared the diameter of the 105 2ltr f/w the unused one to that on my 1300 and dimentions are identical so i will have to change it over now both 2ltr starters are 9 tooth one was supplied from a 105 and the other is from the donner car 116 sorry fot my ignorance but what is a pinion and how do i mesure it to make sure ive got the correct one thanks for all your help