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any difference in pre-cross flow engines. 

 

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 Post subject: any difference in pre-cross flow engines.
Posted: Sun Oct 04, 2009 11:31 am 
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i have a 1968 zb fairlane, it is a 6 cyl pre cross, with column manual. i have fitted a 200ci pre-cross and b/w 35 from an xw, i used the engine mounts and base plates form the original zb motor, now i find the engine sits too high, and too far forward its touching the sway bar, but the trans sits too far back and the tranny x-member is about an inch and 1/2 from lining up with the holes! does anyone have any ideas why, is it the mounts i used as i thought all pre-x mount holes on the block are the same, i do know the block height is taller than the original motor, but still why is it not fitting.

 

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 Post subject: Re: any difference in pre-cross flow engines.
Posted: Sun Oct 04, 2009 12:37 pm 
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Are you sure it's the earlier 200 that you have fitted and not the later XY - XB 200 or 250?
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 Post subject: Re: any difference in pre-cross flow engines.
Posted: Sun Oct 04, 2009 12:42 pm 
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the guy i got the engine from said it was xw, whats the diff between the later xy-xb 200, and why would my tranny sit so far back when the engine is too far forward??

 

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 Post subject: Re: any difference in pre-cross flow engines.
Posted: Sun Oct 04, 2009 12:55 pm 
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The XY - XB 200 & 250 is a lot longer & taller than the earlier engines

XK - XW 144, 170, 188, 200 & 221 are all the same length - The 221 is a bit taller than the others due to the longer crank stroke.

The XY - XB 200's & 250's have the same block - You can interchange the crank & rods to make a 200 into a 250

Does your engine have a PCV in the rear of the tappet cover?
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 Post subject: Re: any difference in pre-cross flow engines.
Posted: Sun Oct 04, 2009 4:05 pm 
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 Post subject: Re: any difference in pre-cross flow engines.
Posted: Sun Oct 04, 2009 8:05 pm 
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Early 200's have a different bolt pattern ( for the engine mounts ) than the later ones, if I remember.......much like the 170's.......only 3 bolts per side????...instead of 4.?????......and mounted further forward.....????.....instaed of being near the centre of the block.

 

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 Post subject: Re: any difference in pre-cross flow engines.
Posted: Sun Oct 04, 2009 10:08 pm 
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ok, i fixed the trans mount by grafting two mounts together to get the extra length i need, any ideas to get the engine to sit lower as the air cleaner hits the bonnet, remember i'm using the original zb mounts, i know the block height is taller but i checked the xy mounts and it makes no difference in the height of the motor.

 

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