Author Topic: Boring out a 1.6TD to accommodate 1.9TD pistons? (Read 6715 times)

SR Heer · « **on:** October 24, 2008, 07:40:44 am »

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?

zukgod1 · « **Reply #1 on:** October 24, 2008, 07:49:50 am »

This has been discussed already do a quick search.

The walls are too thin for that.

saurkraut · « **Reply #2 on:** October 24, 2008, 08:19:55 am »

Hey Burn,

This should be in the FAQ

the caveman · « **Reply #3 on:** October 24, 2008, 11:22:15 am »

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.

theman53 · « **Reply #4 on:** October 24, 2008, 11:52:11 am »

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.

zukgod1 · « **Reply #5 on:** October 24, 2008, 12:22:57 pm »

Quote from: "the caveman"

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.

SR Heer · « **Reply #6 on:** October 24, 2008, 12:42:28 pm »

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

zukgod1 · « **Reply #7 on:** October 24, 2008, 12:48:01 pm »

Man that would be a fun engine I'll bet...

zukgod1 · « **Reply #8 on:** October 24, 2008, 12:51:21 pm »

Quote from: "libbybapa"

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.

SR Heer · « **Reply #9 on:** October 24, 2008, 12:57:52 pm »

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

theman53 · « **Reply #10 on:** October 24, 2008, 01:37:23 pm »

Quote from: "SR Heer"

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.

MJF · « **Reply #11 on:** October 24, 2008, 01:59:57 pm »

1,9td has 2mm larger piston pin and ~4mm taller piston than 1,6.

SR Heer · « **Reply #12 on:** October 24, 2008, 02:55:37 pm »

Quote from: "libbybapa"

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

SR Heer · « **Reply #13 on:** October 24, 2008, 04:02:48 pm »

Quote from: "MJF"

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

MJF · « **Reply #14 on:** October 24, 2008, 04:30:28 pm »

1,6 136mm and 1,9 144mm. 1,9 block is also taller.