V70 - Dodgy engine noises
Discussion
Hello,
Driving home this evening I noticed a crater in our otherwise perfectly surfaced roads (/sarcasm), but was too late too avoid dropping the left wheels into it. Much wincing, banging and shuddering occured, plus some gentle swearing. Immediately afterwards the engine pulsed in a very unhappy way before settling down. My gearbox isn't too happy at the moment, so I initially thought the bump had unsettled it.
However, I then realised that when putting any pressure on the accelerator, there was a definite extra noise that hadn't been there before. It's a kind of hissing or rushing-of-air noise. Then, when you release the accelerator pressure, there's a weird 'chirrup' noise. Each time you accelerate and release, the same noises happen. I wasn't far from home, so I gently coaxed it back. I found it difficult to tell, but I think it seemed lower on power - it seemed to have trouble climbing a particular hill as the gearbox kept shuffling to try and find something it liked. Back on the drive, I put it in Park and gradually increased the RPM. Once you wind it up to 2,000, releasing the throttle then results in a sort of chuff-chuff-chuff noise and associated vibration as the engine returns unhappily to idle.
I've looked under the bonnet and can't see anything really obvious, but I don't really know where to look on this one.
Any ideas?
The car is a Ph3 ('58) V70 D5 Geartronic.
Driving home this evening I noticed a crater in our otherwise perfectly surfaced roads (/sarcasm), but was too late too avoid dropping the left wheels into it. Much wincing, banging and shuddering occured, plus some gentle swearing. Immediately afterwards the engine pulsed in a very unhappy way before settling down. My gearbox isn't too happy at the moment, so I initially thought the bump had unsettled it.
However, I then realised that when putting any pressure on the accelerator, there was a definite extra noise that hadn't been there before. It's a kind of hissing or rushing-of-air noise. Then, when you release the accelerator pressure, there's a weird 'chirrup' noise. Each time you accelerate and release, the same noises happen. I wasn't far from home, so I gently coaxed it back. I found it difficult to tell, but I think it seemed lower on power - it seemed to have trouble climbing a particular hill as the gearbox kept shuffling to try and find something it liked. Back on the drive, I put it in Park and gradually increased the RPM. Once you wind it up to 2,000, releasing the throttle then results in a sort of chuff-chuff-chuff noise and associated vibration as the engine returns unhappily to idle.
I've looked under the bonnet and can't see anything really obvious, but I don't really know where to look on this one.
Any ideas?
The car is a Ph3 ('58) V70 D5 Geartronic.
Prawo Jazdy said:
Hello,
Driving home this evening I noticed a crater in our otherwise perfectly surfaced roads (/sarcasm), but was too late too avoid dropping the left wheels into it. Much wincing, banging and shuddering occured, plus some gentle swearing. Immediately afterwards the engine pulsed in a very unhappy way before settling down. My gearbox isn't too happy at the moment, so I initially thought the bump had unsettled it.
However, I then realised that when putting any pressure on the accelerator, there was a definite extra noise that hadn't been there before. It's a kind of hissing or rushing-of-air noise. Then, when you release the accelerator pressure, there's a weird 'chirrup' noise. Each time you accelerate and release, the same noises happen. I wasn't far from home, so I gently coaxed it back. I found it difficult to tell, but I think it seemed lower on power - it seemed to have trouble climbing a particular hill as the gearbox kept shuffling to try and find something it liked. Back on the drive, I put it in Park and gradually increased the RPM. Once you wind it up to 2,000, releasing the throttle then results in a sort of chuff-chuff-chuff noise and associated vibration as the engine returns unhappily to idle.
I've looked under the bonnet and can't see anything really obvious, but I don't really know where to look on this one.
Any ideas?
The car is a Ph3 ('58) V70 D5 Geartronic.
How deep was this pothole?Driving home this evening I noticed a crater in our otherwise perfectly surfaced roads (/sarcasm), but was too late too avoid dropping the left wheels into it. Much wincing, banging and shuddering occured, plus some gentle swearing. Immediately afterwards the engine pulsed in a very unhappy way before settling down. My gearbox isn't too happy at the moment, so I initially thought the bump had unsettled it.
However, I then realised that when putting any pressure on the accelerator, there was a definite extra noise that hadn't been there before. It's a kind of hissing or rushing-of-air noise. Then, when you release the accelerator pressure, there's a weird 'chirrup' noise. Each time you accelerate and release, the same noises happen. I wasn't far from home, so I gently coaxed it back. I found it difficult to tell, but I think it seemed lower on power - it seemed to have trouble climbing a particular hill as the gearbox kept shuffling to try and find something it liked. Back on the drive, I put it in Park and gradually increased the RPM. Once you wind it up to 2,000, releasing the throttle then results in a sort of chuff-chuff-chuff noise and associated vibration as the engine returns unhappily to idle.
I've looked under the bonnet and can't see anything really obvious, but I don't really know where to look on this one.
Any ideas?
The car is a Ph3 ('58) V70 D5 Geartronic.
Sounds to me that the exhaust may have been crushed restricting the flow of exhaust gas.
Difficult to say. Probably 15cm, but that might be a ridiculous over-guess. It was a sunken drain cover, so it was more the abruptness of the edges that made the impact felt. I'd say probably not deep enough to hit the exhuast, but I'll have a more thorough look (already had a quick peek).
However, it seems to have gone back to normal now anyway! I left it for an hour or so while I had a cup of tea, and then started it again. No noises revving it in N, so I took it for a drive for ten minutes, and the noises were gone. I'm puzzled as it really did sound quite serious before!
However, it seems to have gone back to normal now anyway! I left it for an hour or so while I had a cup of tea, and then started it again. No noises revving it in N, so I took it for a drive for ten minutes, and the noises were gone. I'm puzzled as it really did sound quite serious before!
A hiss and chirp after hitting a big pothole in any turbocharged car is often a good sign that a pipe has been dislodged somewhere.
I worked on a C70 T5 a while ago that idled fine and ran fine with no lights or warnings. It was totally gutless and when you changed gear, it sneezed! Turned out the jubilee clip on the bottom intercooler hose had had enough and wandered off somewhere and the pipe was just making enough contact to run the car but not hold any boost.
I worked on a C70 T5 a while ago that idled fine and ran fine with no lights or warnings. It was totally gutless and when you changed gear, it sneezed! Turned out the jubilee clip on the bottom intercooler hose had had enough and wandered off somewhere and the pipe was just making enough contact to run the car but not hold any boost.
Well, the diagnosis at a local specialist was:
a) Swirl valve mechanism broken and engine clogged with crap as a result,
b) Injectors all playing up in one way or another causing a misfire,
c) Radiator leaking.
Adding on the brakes and tyres that it also needs, it's going to cost more than £2000. I've become a PH cautionary tale! The 'bump' was just coincidence, or dislodged a lump of clag probably.
a) Swirl valve mechanism broken and engine clogged with crap as a result,
b) Injectors all playing up in one way or another causing a misfire,
c) Radiator leaking.
Adding on the brakes and tyres that it also needs, it's going to cost more than £2000. I've become a PH cautionary tale! The 'bump' was just coincidence, or dislodged a lump of clag probably.
Oh dear.
I picked my car up yesterday, which was all clean and shiny, sporting all season tyres and new brake pads, along with a new radiator and a washer system that works once again. So far so good. However, despite exercising my bank account to the tune of almost £3k (more than half of which was spent on the 'engine issue'), the engine problem reoccurred on the journey home. It's intermittent, and didn't happen when I used the car again this morning. It's therefore plausible that the car behaved normally when the garage test drove it.
The specialist has had another look this afternoon, drove the car and recreated the noise. He had suspicions about the cause and ran the car through the iron brain. This showed up a turbo malfunction, which was an 'amber' issue when it was first tested weeks ago, but has now moved to a 'red' issue since the other red issues have been fixed and allowed the turbo to discover how f
ked it really is.
I was geared up to have a go at the garage for wasting my money on fixing things that weren't related to the actual problem, but having seen what information they were working with, I can understand how this has happened. Given that the car has a jerky automatic and has done 130k, I feel like it's time to cut losses, but that's quite difficult after a very large spend. At this rate though, I'll have to keep it for the rest of my life in order to feel that I've got my moneys worth out of it.
It's fair to say I'm regretting this purchase.
(And, I've just noticed, happy PH 'century' to me
)
I picked my car up yesterday, which was all clean and shiny, sporting all season tyres and new brake pads, along with a new radiator and a washer system that works once again. So far so good. However, despite exercising my bank account to the tune of almost £3k (more than half of which was spent on the 'engine issue'), the engine problem reoccurred on the journey home. It's intermittent, and didn't happen when I used the car again this morning. It's therefore plausible that the car behaved normally when the garage test drove it.
The specialist has had another look this afternoon, drove the car and recreated the noise. He had suspicions about the cause and ran the car through the iron brain. This showed up a turbo malfunction, which was an 'amber' issue when it was first tested weeks ago, but has now moved to a 'red' issue since the other red issues have been fixed and allowed the turbo to discover how f
ked it really is.I was geared up to have a go at the garage for wasting my money on fixing things that weren't related to the actual problem, but having seen what information they were working with, I can understand how this has happened. Given that the car has a jerky automatic and has done 130k, I feel like it's time to cut losses, but that's quite difficult after a very large spend. At this rate though, I'll have to keep it for the rest of my life in order to feel that I've got my moneys worth out of it.
It's fair to say I'm regretting this purchase.
(And, I've just noticed, happy PH 'century' to me
)Edited by Prawo Jazdy on Thursday 2nd October 19:44
Prawo Jazdy said:
Well, the diagnosis at a local specialist was:
a) Swirl valve mechanism broken and engine clogged with crap as a result,
That's a design fault and will happen again in time.a) Swirl valve mechanism broken and engine clogged with crap as a result,
A stepper motor pushes a plastic rod to open the valve. The rod clips onto a plastic ball at the valve end. This plastic ball eventually wears and the plastic rod falls off.
It's possible to bodge a repair, but access is tight.
Volvo dealer wanted £700 to do this three years ago, with the threat of a further £2000 if the injectors were stuck (ha ha, oh, my aching ribs).
I've just had mine done by an independent Volvo specialist for £350.
Or you could try reading what I actually wrote. I had other work done and the total was £2700. I haven't done the maths, but roughly £1500 was spent replacing the swirl assembly and having the injectors changed.
You're assuming that this business has screwed me over just because your mate had a problem and in his case it was a loose hose. The problem I have isn't that simple. If it was, I suspect the garage would have fixed a loose hose for me instead.
I notice you're in a similar part of the country to me. Do you use an independent for your Volvo?
You're assuming that this business has screwed me over just because your mate had a problem and in his case it was a loose hose. The problem I have isn't that simple. If it was, I suspect the garage would have fixed a loose hose for me instead.
I notice you're in a similar part of the country to me. Do you use an independent for your Volvo?
Edited by Prawo Jazdy on Saturday 4th October 11:12
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