VWDiesel.net The IDI, TDI, and mTDI source.
Engine Specific Info and Questions => IDI Engine => Topic started by: SR Heer on October 24, 2008, 07:40:44 am
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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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This has been discussed already do a quick search.
The walls are too thin for that.
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Hey Burn,
This should be in the FAQ
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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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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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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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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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Man that would be a fun engine I'll bet...
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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? :D
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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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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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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1,9td has 2mm larger piston pin and ~4mm taller piston than 1,6.
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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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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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1,6 136mm and 1,9 144mm. 1,9 block is also taller.
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1,9td has 2mm larger piston pin and ~4mm taller piston than 1,6.
I doubt 'caveman' will really want to crack the oil pan to take some pics and have a look see but either the 1.7 comparatively speaking has specially made 1.9 TD pistons that accommodate the differences to match up with the 1.6TD rods or specially made rods to accommodate the differences in matching up with 1.9TD pistons. Then rods may be totally different too - like slightly different in length, but I am thinking crank would most likely would be the same as 1.6.
Stephen
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Thanks Andrew!!
I appreciate the pics and info!
I see that you are not Joe the plumber but rather Andrew the pumper!
I'll keep that in mind when I need a rebuild for one!
Thanks again!
Stephen