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Boring out a 1.6TD to accommodate 1.9TD pistons?
by
SR Heer
on 24 Oct, 2008 07:40
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When overhauling 1.6TDs - can one bore the 1.6 cylinder out to accommodate the 1.9TD standard turbo pistons without thinning the cylinder walls too much?
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#1
by
zukgod1
on 24 Oct, 2008 07:49
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This has been discussed already do a quick search.
The walls are too thin for that.
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#2
by
saurkraut
on 24 Oct, 2008 08:19
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Hey Burn,
This should be in the FAQ
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#3
by
the caveman
on 24 Oct, 2008 11:22
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Strange. I thought a 1.7 was just a 1.6 with oilers and bored out to shove in the larger pistons. I guess it's an actual specific block for that application.
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#4
by
theman53
on 24 Oct, 2008 11:52
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what I have wondered and don't know if it would work or has been asked even is could you bore out the block and put in different liners. Bore out the 1.6 liter block big enough to accept a 1.9L sleeve? I know the pistons would fit then, but would the block be able to handle that is the question.
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#5
by
zukgod1
on 24 Oct, 2008 12:22
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Strange. I thought a 1.7 was just a 1.6 with oilers and bored out to shove in the larger pistons. I guess it's an actual specific block for that application.
It may be bored for larger pistons not to sure but the OP was asking about 1.9 pistons.
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#6
by
SR Heer
on 24 Oct, 2008 12:42
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Yeah 'caveman' - just take it to the house and have your cat
CTScan it! That should do the trick anyway!
I had thought of the relining of 1.6 blocks with 1.9 sleeves - possible?
Marc - how does the 1.6 crank with 1.9 displacement engines (1.7s) compare to 1.6 and 1.9 as far as redlining and HP - I would say it acts more like the rev-ier 1.6 yet with more midrange torque - might not be a half bad combination? But you said your 1.7 was a industrial engine and they usually are all about low end torque! ? !
Stephen
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#7
by
zukgod1
on 24 Oct, 2008 12:48
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Man that would be a fun engine I'll bet...
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#8
by
zukgod1
on 24 Oct, 2008 12:51
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The 1.7 uses the bore of the 1.9 and the stroke of the 1.6. I do not know how/if the casting varies from the 1.6.
Hey Caveman, how about getting your 1.7 sonic wall tested to compare with the figures posted previously? 
Andrew
Wow I wasn't aware of that. Learn something new every day.
I'll bet it's different from the 1.6 block but I don't know for sure.
Would be cool to know though.
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#9
by
SR Heer
on 24 Oct, 2008 12:57
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Wow is right! - now we are talking!
Look guys a 1.6TD block with 1.9 sleeves with 1.9TDI pistons and TDI head with M-TDI pump - I bet it would get better MPG than even the 1Z,AUH,or ALH engines and might stay with 'crotchrockets' - might have to call it the 'dieselrocket'!!!
Stephen
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#10
by
theman53
on 24 Oct, 2008 13:37
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Wow is right! - now we are talking!
Look guys a 1.6TD block with 1.9 sleeves with 1.9TDI pistons and TDI head with M-TDI pump - I bet it would get better MPG than even the 1Z,AUH,or ALH engines and might stay with 'crotchrockets' - might have to call it the 'dieselrocket'!!!
Stephen
could you do the same thing with just the 1.9TD pistons...for those of us that don't want the TDI route...as the regular TD would probably be expensive enough.
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#11
by
MJF
on 24 Oct, 2008 13:59
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1,9td has 2mm larger piston pin and ~4mm taller piston than 1,6.
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#12
by
SR Heer
on 24 Oct, 2008 14:55
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A 1.6TD block sleeved and bored to use 1.9TD pistons and using the 1.9 head would result in a 1.7 with lower compression than the 1.6 or 1.9 but higher than the 1.6 with the 1.9 head.
Andrew
Apparently the 1.9TD pistons are a bit taller than the 1.6TD pistons - otherwise how come the compression is higher than just 1.6 with a 1.9 head and lower than 1.6 or 1.9 respectively?!? Does anyone know if that is so?
Stephen
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#13
by
SR Heer
on 24 Oct, 2008 16:02
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1,9td has 2mm larger piston pin and ~4mm taller piston than 1,6.
Ok what about the 1.6 to 1.9 rod's lengths - how do they compare - probably inconceivable of putting 1.9 rod to accommodate the 1.9 pistons onto a 1.6 crank?
Stephen
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#14
by
MJF
on 24 Oct, 2008 16:30
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1,6 136mm and 1,9 144mm. 1,9 block is also taller.