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leyland 4.4 howling

Tech Talk for Rover owners.

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Posts: 3385
Joined: Fri Sep 17, 2004 8:26 pm
Location: Melbourne

leyland 4.4 howling

Post by shakes »

my motor is an old p76 4.4 stroked out to 4.7ish and after getting her back in after the rebuild on start up she makes a "howling" sound for 10-15seconds

It's defintly vacuum related take the oil cap out and it stops! (and you nearly lose your hand down into the head)
Different oil cap didnt stop the sound, removing rocker cover breathers doesnt stop the sound, new rocker cover gaskets didnt stop it. ohh and its only while the motor is cold

what could be making the noise and how could i stop it?

Simon
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Posts: 243
Joined: Mon Sep 26, 2005 10:19 pm
Location: Nhill vic

Post by Rangie Thing »

Hi i had the same thing happen when i changed my carby on my p76 engine and i fix it by moving the rocker cover breather on the drivers side to above the carby.
Also check your one way valve breather mine sits on the pass side.
hope this helps
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POD
Posts: 5
Joined: Fri May 05, 2006 12:00 pm
Location: Drouin, Vic

Post by POD »

Yeah sounds like you have your crankcase breather connected to manifold vacuum- it should connect in between the carby and the air filter somewhere i.e. above the butterfly not below it.
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