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1690 engine substitute

Posted: Fri Jun 14, 2019 6:40 am
by motoOzarks
Was wondering

will any other engine from a David Brown tractor fit in place of the 6 cylinder on a 1690

1490?

Re: 1690 engine substitute

Posted: Fri Jun 14, 2019 8:38 am
by ollek
Everything in front of the clutch housing is different. All steering pipes and hydraulic pipes are different, as are the electrical leads that fits to the engine side. I would not even think about swapping a 6-cylinder engine for a 4-cylinder.

Re: 1690 engine substitute

Posted: Fri Jun 14, 2019 9:03 am
by Scooby
motoOzarks wrote:
Fri Jun 14, 2019 6:40 am
Was wondering

will any other engine from a David Brown tractor fit in place of the 6 cylinder on a 1690

1490?
1594 ?

Re: 1690 engine substitute

Posted: Fri Jun 14, 2019 5:56 pm
by motoOzarks
more specifically
would a 4 cylinder DB bolt up to the trans housing and with the clutch fit the shaft?
Or is a 1490 not the same animal

Re: 1690 engine substitute

Posted: Tue Jul 02, 2019 7:38 am
by karenwillson
Everything before the grasp lodging is extraordinary. All guiding channels and water powered funnels are extraordinary, just like the electrical leads that fits to the motor side. I would not consider swapping a 6-chamber motor for a 4-chamber.

Re: 1690 engine substitute

Posted: Wed Jul 17, 2019 11:28 pm
by motoOzarks
thanks for the first post

A fellow from Netherlands claims to have seen a swap the other way, from 4 to 6.

with a change of the shafts

Re: 1690 engine substitute

Posted: Thu Jul 18, 2019 6:40 am
by cobbadog
Ive seen 4 cylinder tractors with a V8 in them, so almost anything is possible but how are your engineering skills to do so?

Re: 1690 engine substitute

Posted: Thu Jul 18, 2019 7:19 am
by motoOzarks
not enough for a v8

Re: 1690 engine substitute

Posted: Thu Jul 18, 2019 12:48 pm
by cobbadog
Just one of the tractors was a TEA20 grey fergusson with a 302 Ford V8, a Ford 9N with a sidevalve V8 and some strange model with an alloy Rover V8. All had major surgery to make them fit but as mentioned how much engineering and cost do you take it to. Is it for the challenge to show it can be done or trying to save money and use something available. If it is the second option to save money, believe me you wont save money it will go way over budget.