Took the air filter off the Stag at the weekend to re-tighten the inlet manifold bolts after the head replacement, job done no problems.
Changed the oil and filter tonight and took the car for a spin around the block, pulled onto the drive and the car struggled to tick over. Lifted the bonnet and I could hear what can only be described as a "swishing" noise from the middle of the engine. First thoughts were its the water pump but why would that effect the tick over? Anyway took the air filter off with engine running blocked of vac pipes where they came off the air filter no change in noise.
Switched off engine removed cam covers to check oil supply all Ok. Re fitted air filter and cam covers started up engine, noise gone:?Tickover still lumpy though, took the car round the block again, Vac gauge not reading correctly, showing "accelerating" all the time, checked vac pipes and found pipe off the air filter box. replaced pipe and tick over has improved however when revving the engine revs droplow momentarily when foot is taken off throttle. Vac gauge is showing idle at tick over but is a little erratic. Question is what was the swishing noise and where was it coming from? It could have been the vac pipe sucking but cant help worrying its something else. Took the car for another run up the local bypass, 70mph and running cool so if anything was gonna go it probably would have gone then, engine now sounds fine on tickover but Im still worrying. Any ideas before I worry myself into an early grave?
Dave
Changed the oil and filter tonight and took the car for a spin around the block, pulled onto the drive and the car struggled to tick over. Lifted the bonnet and I could hear what can only be described as a "swishing" noise from the middle of the engine. First thoughts were its the water pump but why would that effect the tick over? Anyway took the air filter off with engine running blocked of vac pipes where they came off the air filter no change in noise.
Switched off engine removed cam covers to check oil supply all Ok. Re fitted air filter and cam covers started up engine, noise gone:?Tickover still lumpy though, took the car round the block again, Vac gauge not reading correctly, showing "accelerating" all the time, checked vac pipes and found pipe off the air filter box. replaced pipe and tick over has improved however when revving the engine revs droplow momentarily when foot is taken off throttle. Vac gauge is showing idle at tick over but is a little erratic. Question is what was the swishing noise and where was it coming from? It could have been the vac pipe sucking but cant help worrying its something else. Took the car for another run up the local bypass, 70mph and running cool so if anything was gonna go it probably would have gone then, engine now sounds fine on tickover but Im still worrying. Any ideas before I worry myself into an early grave?
Dave
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but if you manage to get over we can compare sounds and annoy the neighbours with the roar of twin V8s
I had a listen to my power steering pump. Its silent at tickover (650-700rpm). But anything over 1000rpm it makes a hissing/swishing noise. The one on my Land Rover - different pump but same principle, does the same. I personally think it is just the noise it makes as the fluid circulates.
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