ticking & whooshing noise under acceleration
Discussion
I've already done a bit of googling and there's a few possible suggestions, some are more worrying than others. I just wondered what PHers with more mechanical knowledge than I have think.
2002 Celica 140, 82k miles
Background: Last Friday I had the central section of the exhaust / cat replaced and the independent garage admitted they had to make some ‘adjustments’ to make it fit the back box section, which they themselves had fitted two months or so ago. I only mention this as one of the suggestions I read online was an exhaust leak, or an ill fitting exhaust joint causing increased back pressure.
Problem: I’ve noticed a whooshing sound coming from the front end as I pull away from stationary and when accelerating at speed. If I gently depress the pedal and build up speed gradually it’s not really noticeable. I’m also hearing a ticking noise under moderate / hard acceleration that stops when cruising at a constant speed or under more gentler acceleration. Both noises seem to be coming from the engine compartment. I've only really noticed it since the exhaust was repaired and it's possible it could have been obscured by the louder noise from the exhaust (it was blown), or it could be new, I dunno.
It’s not doing it when idling or if revved in neutral
The clutch isn’t slipping as I’ve floored it at 45mph in 2nd, 3rd and 4th and the revs increase just as they should.
Some online suggestions include an exhaust problem, either at the manifold or further back. The head gasket
, knocking, or valve problems.
Any ideas?
2002 Celica 140, 82k miles
Background: Last Friday I had the central section of the exhaust / cat replaced and the independent garage admitted they had to make some ‘adjustments’ to make it fit the back box section, which they themselves had fitted two months or so ago. I only mention this as one of the suggestions I read online was an exhaust leak, or an ill fitting exhaust joint causing increased back pressure.
Problem: I’ve noticed a whooshing sound coming from the front end as I pull away from stationary and when accelerating at speed. If I gently depress the pedal and build up speed gradually it’s not really noticeable. I’m also hearing a ticking noise under moderate / hard acceleration that stops when cruising at a constant speed or under more gentler acceleration. Both noises seem to be coming from the engine compartment. I've only really noticed it since the exhaust was repaired and it's possible it could have been obscured by the louder noise from the exhaust (it was blown), or it could be new, I dunno.
It’s not doing it when idling or if revved in neutral
The clutch isn’t slipping as I’ve floored it at 45mph in 2nd, 3rd and 4th and the revs increase just as they should.
Some online suggestions include an exhaust problem, either at the manifold or further back. The head gasket
, knocking, or valve problems.Any ideas?
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