RJ Performance in Calgary
Registered User
Joined: Aug 2005
Posts: 7,780
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From: Airdrie, Alberta
$5k for a short block. Thats lots tons of money. I was thinking a complete fresh engine is worth about that much.
Clayh, curious how did you pay for a 03 SO piston? I priced out 6.7L piston for my 10 truck, cummins locally wanted $240 for a piston/sleeve/pin/rings. Was thinking about trying a VP SO piston for my 03 engine as the injector nozzles for both engines look very similar, the bowl is only slightly different. I can get a VP piston/pin/rings for $140.
Clayh, curious how did you pay for a 03 SO piston? I priced out 6.7L piston for my 10 truck, cummins locally wanted $240 for a piston/sleeve/pin/rings. Was thinking about trying a VP SO piston for my 03 engine as the injector nozzles for both engines look very similar, the bowl is only slightly different. I can get a VP piston/pin/rings for $140.
The Guru
Joined: Jan 2004
Posts: 6,589
Likes: 0
From: Airdrie Canada
The piston bowl is night/day different between a 24VP SO truck vs HO 305 CR. Most of the stuff that done to the piston bowl is for noise suppression. The injector is in the same position and I bet that the spray angle is similar. Just VP engines seem to take the abuse better than a CR engine. I have nothing to lose. I do have a few spare 305 engines. Been curious on seeing the difference.
Thread Starter
Registered User
Joined: Oct 2006
Posts: 249
Likes: 0
From: Southern Alberta
Can you guys answer a couple quick questions about this engine swap?
1. Does the CP3 need to be timed? I don't see any marks on the gear.
2. I found torque specs for the intake and exhaust manifolds, but I can't seem to find injector torque.
Any other surprises when changing out the long block? I am a HD mechanic, but this is the first Duramax I ever wrenched on.
1. Does the CP3 need to be timed? I don't see any marks on the gear.
2. I found torque specs for the intake and exhaust manifolds, but I can't seem to find injector torque.
Any other surprises when changing out the long block? I am a HD mechanic, but this is the first Duramax I ever wrenched on.
Registered User
Joined: Aug 2003
Posts: 2,021
Likes: 7
From: Cochrane Alberta
$5k for a short block. Thats lots tons of money. I was thinking a complete fresh engine is worth about that much.
Clayh, curious how did you pay for a 03 SO piston? I priced out 6.7L piston for my 10 truck, cummins locally wanted $240 for a piston/sleeve/pin/rings. Was thinking about trying a VP SO piston for my 03 engine as the injector nozzles for both engines look very similar, the bowl is only slightly different. I can get a VP piston/pin/rings for $140.
Clayh, curious how did you pay for a 03 SO piston? I priced out 6.7L piston for my 10 truck, cummins locally wanted $240 for a piston/sleeve/pin/rings. Was thinking about trying a VP SO piston for my 03 engine as the injector nozzles for both engines look very similar, the bowl is only slightly different. I can get a VP piston/pin/rings for $140.
$240 sounds about right. I spent $650 in total for a top end gasket kit(head gasket, exhaust, valve covers, etc), oil pan gasket, and loaded piston(piston with rings only). Oh yeah and a Cummins ball cap.
As far as I can tell a CR SO piston and injectors are the same as CR HO. Don't know about the differences on a VP/CR.
I think the only reason the CRs don't stand up as well is due to the stupid valve seats that keep dropping out when you get them hot.
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