Leyland P76 Owners 2003

Technical Question and Answers for YOU!!

Boxer motor / Terrier motor

How do I tell?

From :- Chris Ryan

Subject: Boxer motor
Date: Tue, 12 Aug 2003
G'day
I swapped a set of old Holden Mag wheels for a V8 motor that was supposed to have been in a Leyland Boxer truck. As far as I know the truck block is a different casting. Does anybody know how to tell the difference?

Reply Greg Black

Date: Wed, 13 Aug 2003
The only difference I was aware of was the forged crankshaft and if it had been in a truck it may have had a separate oil pump. my boxer looks just like my normal block.

Reply Stuart Brown

Sent: Wednesday, 13 August 2003 8:59 PM
Hi all,
I guess you actually meant terrier engine.
The distributor advance is different and some had lower compression, otherwise identical!.

Reply Alex

Wed, 13 Aug 2003
Terrier name of engine, fitted to trucks called boxer.
I believe the engines were also painted red, with a zenith rather than stromberg carby.
As well as a water temp sensor fitted to the front of the cylinder head rather than the inlet manifold.

Reply Dave Waters
Wednesday, August 13, 2003
Same carby but if its like a bedford it has a lock out on full throttle unless heavy load [vacumm operated], air cleaner is a large drum type thing on the end of a pipe.
Water temp is in the back of the head as it lower more constant indication.
Radiator fan bolts on to the crank pulley air compressor bolts to the same position as a/c compressor on a leyland.
Fly wheel is different to accept the 6 bolt clutch cover.
4417 engine number prefix.
Conrods may be different but the pistons definatly different to lower compresson.
No vac advance [variable dwell] on distributor.

Reply Garth

Wed, 13 Aug 2003
The terrior motor has a different cam shaft. More low down torque and designed to reach maximum Hp at 3300 rpm The piston are 8.00:1 compression, dished type.
The skirt walls on the piston are almost 1/8 inch thick. , very strong.
Yes the temp sender is in the head as well.

Changing a P76 4.4 ltr to a Terrier motor

Question

From: "Phil"
Date: Sun, 25 Jan 2004 Hi
I would like to know what Leyland did to the P76 4.4 ltr motor to make it into the Terrier motor (truck & Bus)?
i.e. what did they change?
Regards Phil

Reply

Date: Tue, 27 Jan 2004
Hi,
the Terrier motor runs 8 to 1 compression ratio which was achieved by using dished pistons they didnt have a vacum advance unit and a few ran a sinlge barrel zenith carburettor depending on what type of vehicle it was fitted to.
I believe the hp output to be around 130 BHP but I may be wrong.
Also the sump was deeper and of higher capacity and the oil pump pick up was modified accordingly
Andrew
Last updated
Dec, 2005
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