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Holden 304 5ltr engine number

Tristan383

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Hi im new to the forum and I have a 304 5ltr I'm trying to see what car my engine has come from the id on the block starts with N5U
 

Sandman

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Is there maybe a faint V in front of the N. All 304's start with a V apart from the designated spare parts blocks which started with SVU. Another thing to look at is the casting date on the top of the block near the timing cover. Should be a little sundial and a few digits.
 

Tristan383

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No problem, there isn't a V unless it wasn't stamped, I will look at the digits on front of engine thanks
 

Smitty

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Hi im new to the forum and I have a 304 5ltr I'm trying to see what car my engine has come from the id on the block starts with N5U


all service/replacement blocks from GMH start with 'N'
 

Bigfella237

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I have "N5U" listed as a GMP&A replacement block for a 308 blue motor, not a 304.

I thought the "N5" prefix spare parts blocks were replaced by "S" prefixes for VN through to VT?

~ apart from the designated spare parts blocks which started with SVU. ~
"SVU" & "CVU" prefixes came from VQ-onward V8 Statesmen and Caprices respectively.

I believe you may be talking about the "SU" prefix which was a GMP&A replacement 304 block around the VR / VS era?
 

Fachoo

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I have "N5U" listed as a GMP&A replacement block for a 308 blue motor, not a 304.

I thought the "N5" prefix spare parts blocks were replaced by "S" prefixes for VN through to VT?


"SVU" & "CVU" prefixes came from VQ-onward V8 Statesmen and Caprices respectively.

I believe you may be talking about the "SU" prefix which was a GMP&A replacement 304 block around the VR / VS era?
Adding to your info
Yep N5??? number blocks were 308 short motor replacements up to WB including VB - VH
However other N5 ?? numbers were used in the VK/VL as 304 short motor replacement blocks in the changeover from 308.

SV was for VN – VR 304 replacement blocks. SU was for VR – VS 304 blocks were a roller block with no 304 cast on side of block. Statesmen were SVU numbers except for HSV models. All other VN – VS standard 304’s were VU

The OP might have a 308 block ?????, the casting date sundial pointer for 308 block was in the 9oclock position and the 304 is in the 1oclock position.
 
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