V6 Engine and Auto numbers, which model do I have

[NeddyBear]

The engine and transmission is out of a wreck.
The tag number on the auto is 8HFD and 618HFDY20331965.
Engine number is VH or VM 727753 and the number cast on the rear of the block is 24506029 series II.
Was there any noticeable difference between the VT and the VX V6 engines.

 

[Jxfwsf]

So you have some parts from a 1998 VT.

No noticeable difference in the engines except age and km's.
The VX had a better upper and lower intake manifold, redesigned mainly around the PCV valve.

 

[Bigfella237]

The only "VM" prefix I know of is an option "LB9" 5.0L V8 (the 179kw roller motor) from a late VS / early VT, but if you say this is a V6 then I can only suppose the prefix is actually "VH"?

V6's aren't really my forte but VH727753 should be the standard ECOTEC 3.8L V6 most likely from a series 1 VT, I don't have enough data listed to say for sure but I'd guess early '98 build?

Not sure on the auto myself but this thread was the first to come up in a search:

http://forums.justcommodores.com.au/threads/help-will-a-vt-auto-transmission-fit-into-vy.209910/

Hopefully someone else here can be more precise?

Andrew

 

[NeddyBear]

I've dismantled some of the engine and it looks identical to my VX series II, I plan to have the block rebuilt and hopefully fit all my VX stuff.

Recently when rebuilding the intake system I took a look in the engine from the wreck to see if the PCV valve had a Oring which it didn't just like my acclaim and I can't see any difference between this VT engine and the one in our VX acclaim.

 

[Jxfwsf]

It'll look identical because it is identical.
VS ecotec to VY ecotec is the same engine, the intake manifold was changed during the VX run, doesn't suck as much oil and **** back through the engine.... that's it.
They're still a very expensive engine to reco, much cheaper to find a low km newer model and swap it when needed... dumping thousands into a rebuild just to fit it to a vx..... It'd be cheaper to buy an ls1 wreck at the auctions and do a decent transplant.

I have 1 that has done over 400,000 km's and is still going strong.....
How do i know this engine has done this many km's?
Car was factory fitted with LPG and the engine number is stamped on the compliance plate.
Dash cluster has the corresponding serial number to the cars vin number (no signs of tampering, and who in their right mind would add to an odometer).
About to have it's 3rd auto trans changed, the one in it has the wrong date code so it's been changed at least once before... maybe it's the 4th.....

 

[Immortality]

There were some minor changes during the production run, the intake manifold probably been the biggest one but other changes include head castings, and the sump design also changed during the run. I'm sure there are probably others that I've forgotten too.

 

[The1]

Cam is slightly changed after VS because of the extra power needed with the weight added.

0.050 Valve Timing

VS
Inlet Opens - minus 20.9 degrees BTDC (20.9 degrees ATDC)
Inlet Closes - 21.4 degrees ABDC
Exhaust Opens - 26.1 degrees BBDC
Exhaust Closes - minus 16.2 degrees ATDC (16.2 degrees BTDC)
Inlet Valve Duration - 180.5 degrees
Exhaust Valve Duration - 189.9 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4066 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4083 inches
Ramp Rate - 2.27
Valve Overlap Seat to Seat - 24.3 degrees
Valve Overlap at 0.050 inches - minus 37.1 degrees
Inlet Lobe Centreline - 111.1 degrees
Exhaust Lobe Centreline - 111.2 degrees
Lobe Separation Angle - 111.2 degrees

VT-VY
Inlet Opens - minus 24.4 degrees BTDC (24.4 degrees ATDC)
Inlet Closes - 25.8 degrees ABDC
Exhaust Opens - 31.6 degrees BBDC
Exhaust Closes - minus 18.7 degrees ATDC (18.7 degrees BTDC)
Inlet Valve Duration - 181.4 degrees
Exhaust Valve Duration - 192.9 degrees
Inlet Valve Lift with 1.6 to 1 ratio rockers - 0.4099 inches
Exhaust Valve Lift with 1.6 to 1 ratio rockers - 0.4112 inches
Ramp Rate - 2.22
Valve Overlap Seat to Seat - 21.8 degres
Valve Overlap at 0.050 inches - minus 43.1 degrees
Inlet Lobe Centreline - 115.2 degrees
Exhaust Lobe Centreline - 115.1 degrees
Lobe Separation Angle - 115.1 degrees

 

[NeddyBear]

On the block of the VT it has series II so it must be a VT series II from an Executive.
This engine and box has only done 80,000 ks but there no way I'm fitting the engine without knowing its true condition.
Heading down the highway towing the camper with an unknown engine is not on my list of things to do and the fitting is only a job I want to do the once..
I've already had the transmission pulled down and looked at and all was in very good condition, even the oil was bright so no wear at all.
I asked to replace a few things and only because it was apart, here's a good clip if you ever wanted to know what goes into rebuilding a 4L60E transmission.

 

[Jxfwsf]

The engine number you provided would be 1997, one of the first.
I'd say the transmission is the same, iirc 97 vt's had the 8HFD trans.
VH7297XX December 1997.
VH7495XX March 1998.

On the block of the VT it has series II so it must be a VT series II

No, it just means it's an ecotec. It's an american buick engine.
In comparison an early VN 3800 is known as a "Pre-series 1"
Late VN, VP, VR 3800 "series 1"
VS-VY 3.8 "series 2" all these will have the 3800 SERIES II cast into them

 

[NeddyBear]

Has the VT and the VX the same auto trans, in me Max Ellery it states no different and the only difference between the VT and VX block is 5kW at 5200 rpm about 8 horses.