khatib

Hi all,
I'm referring to the VTEC motor number, there is a one digit number under the serial number.
Does anyone know what is this number refers?
https://www.civicforums.com/forums/m...1-motor-no.gif

xRiCeBoYx

iTrader: (22)

Moved to the correct location

*not my picture, taken from google images*


are you talking about the top number or the bottom number?

mac25

-The D is the style of block
-17 is the engine displacement 1.7L
-and the letter or letter number combo is the head type

so all D17 engines should have basically the same block (maybe different internals)

but with a different head option
the head options are

A, A1, A2, A5, A6, A7, A8 and A9 (I did not find any info on an A3 or A4)



The D17a
Is the JDM 01-05 base civic, VTEC headed D17 block



***The fallowing info is from an app and should be cross referenced before used!!!***

D17A
Displacement: 1668 cc
bore: 75mm
stroke: 94.4mm
strock bore ratio: 1.25
deck height: 212mm
valvetrain: SOHC 16 Valve VTEC
camgear: 38 teeth
power: 127-130 hp
torque: 114 lb-ft

sdaidoji

iTrader: (1)

https://www.civicforums.com/forums/2...ine-codes.html

https://www.civicforums.com/forums/2...fications.html

xRiCeBoYx

iTrader: (22)

-a1 vs -a2 is more than just head options, granted, it's the biggest difference. Remember the -a1 engine has a lower CR in comparison to its -a2 counterpart

mac25

Well ya I was just trying to give an example of what the engine number meant, not every difference... then we'd be here all night talking about each engine, the power differences the compression, the stock bolt-ons (exhaust mani vs header, o2 sensors...)

but good point on the cr. =D

xRiCeBoYx

iTrader: (22)

Eh, o2 sensors are the same from a1 to a2. The difference happened in 04 for that. lol

mac25

the position is different, but never mind we're flying off on a tangent.

khatib

Thanks for useful information, I'm talking about the number as explained in the following picture;

https://www.civicforums.com/forums/m...1-motor-no.gif

xRiCeBoYx

iTrader: (22)

Not gonna lie. I've never noticed that number before

ezone

EDIT: Wrong thread. Oops.


I think the 2 below the serial number stamping is not relevant to the engine type.

khatib

i think it's related to the origin/region . Does anyone can confirm?

sdaidoji

iTrader: (1)

mold number used to cast engine?
in other words, why do you think it matters?

rallyeredem0

surprisingly informative thread, thanks guys