jonno
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| posted on 4/2/11 at 10:35 PM |
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1700 x-flow big end bearings
Hi, looks like i'm picking up a new car at the weekend that requires new big end bearings fitting to a 1700 xflow... but is it a easy job to
replace the bearing (just sump off ? or head off ?) or should i just look out for a new engine ? (would a 1600 block be ok with the 1700 head etc)
Cheers... never played with a xflow and not sure whats easiest/cheapest option 
having fun on a budget
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steve m
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| posted on 4/2/11 at 11:28 PM |
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Although putting new mains in is pretty easy, imho i would rebilid the engins totaly, as it will have little bits of white metal floating around
inside the engine
Steve
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stevebubs
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| posted on 5/2/11 at 02:19 AM |
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Ditto - those bearings will have gone for a reason...
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britishtrident
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| posted on 5/2/11 at 08:28 AM |
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Big end bearing failure on an xflo is unusual, it would suggest something has been not quite right when the engine was last rebuilt.
As a minimum you need to take the engine out and carefully examine the big end journals, check them for excessive ovality (out of roundness) and
scoring and check the size markings on the shell bearings to see if the crank has already been reground. There are three possible out comes the least
costly is you will get away with just a new set of shell bearings, the next is that you have enough metal left on the crankshaft to get it ground
under size, the worst case is you may have to scrap the crank.
To prevent it happening again you need to check the oil pump, sump suction strainer and pressure relief valve. You must also check the oil ways are
clear.
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rusty nuts
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| posted on 5/2/11 at 10:30 AM |
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Agree with taking the crank out at the very least X flow's are probably one of the easiest engines to work on with no real need for any special
tools apart from torque wrench and a ring compressor. If you want to do a cheap fix it would be possible to undo the big end caps and push the
piston/rod assembly up the bore slightly , remove the timing chain etc take off the main caps and remove the crank. It's worth bearing in mind
(excuse the pun) that some main bearings were oversize on the outer diameter from the factory with the big end using standard width and narrow. Buton
catalogue gives prices but you may be better off using your local engine reconditioners for parts.
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jonno
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| posted on 5/2/11 at 11:28 AM |
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Thanks for the advise.. i'm picking up tomorrow so i'll have a listen to see how bad it is, but might take on my first engine rebuild !!
(shame its not looking standard, so parts might be but of a mission), i'll have a browse on the Burtons website
having fun on a budget
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rusty nuts
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| posted on 5/2/11 at 01:38 PM |
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If it's any help I have a copy of Rebuilding and tuning a Xflow somewhere you can borrow
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