Author Topic: 1.5 Tdi, possible? (Read 3052 times)

greg123 · « **on:** March 05, 2008, 09:02:33 am »

If one wanted to make a 1.9TDi VE motor a 1.5, principally for UK tax reasons (saves nearly £1,000 in 10 years), would that be possible with 1.5 crank/con rods etc or are the engines too different?

I'm not worried about the lower compression ratio or lower power, those can be addressed no problem. I can't see anything else being an issue.

Greg.

jimfoo · « **Reply #1 on:** March 05, 2008, 09:35:53 am »

Never even heard of a 1.5. Even if it were possible, wouldn't they not believe you and just go by your block number for the engine size? Seems it would have to be torn down for them to be able to verify the size.

greg123 · « **Reply #2 on:** March 05, 2008, 10:07:40 am »

They don't bother looking and You could video the block with ruler etc showing the bore and stroke for evidence.

As the tdi is just a different version of the TD IDI, which is a version of the TD IDI 1.6, which is a version of the NA IDI 1.6, which is a version of the NA IDI 1.5... There was my thoughts that the crank may fit etc.

Greg.

Quote from: "jimfoo"

Never even heard of a 1.5. Even if it were possible, wouldn't they not believe you and just go by your block number for the engine size? Seems it would have to be torn down for them to be able to verify the size.

jimfoo · « **Reply #3 on:** March 05, 2008, 10:29:48 am »

Oh, you mean the 1.5 IDI? I thought you meant there was a 1.5 TDI. I believe the bearings are different sizes on the crank, you would have to get cu$$tom con rods made as they would be way too short. I think you'd spend way more than you plan to save.

greg123 · « **Reply #4 on:** March 05, 2008, 10:44:05 am »

Well there is a 1.5tdi but not a vw one

Dammit... I was hoping something would bolt up... Anyone that's played with a 1.5/1.6 confirm anything that would swap? Or is it $$$ for sure...

Quote from: "jimfoo"

Oh, you mean the 1.5 IDI? I thought you meant there was a 1.5 TDI. I believe the bearings are different sizes on the crank, you would have to get cu$$tom con rods made as they would be way too short. I think you'd spend way more than you plan to save.

jimfoo · « **Reply #5 on:** March 05, 2008, 11:14:39 am »

$$$ for sure for con rods if you want an engine that will actually start. With the 1.5 rods, the space above the piston would probably put your compression on the low end for even a gasser. You could probably have the crank built up and reground for the right bearing size, but again more $. Plus you didn't say what engine you have. I don't think it would work at all in an ALH block.

greg123 · « **Reply #6 on:** March 05, 2008, 03:29:09 pm »

I was hoping the block of the 1.5 and 1.9 tdi head together. Not sure what I'd do about pistons though...

I guess thinking about it unless the bore of the 1.5 and the 1.9 was the same and I could swap crank and con's, there is no real easy way to go about it. Down to choice of a 1.4PD then I guess....

Quote from: "jimfoo"

$$$ for sure for con rods if you want an engine that will actually start. With the 1.5 rods, the space above the piston would probably put your compression on the low end for even a gasser. You could probably have the crank built up and reground for the right bearing size, but again more $. Plus you didn't say what engine you have. I don't think it would work at all in an ALH block.

OM617 · « **Reply #7 on:** March 06, 2008, 09:51:58 am »

If you only save £1,000 in 10 years it would take you quite a long time to recoup the cost of all those parts before you start to actually save something.

Author Topic: 1.5 Tdi, possible? (Read 3052 times)

OM617