by "4muddyfeet - bare knuckle with an EZ30" (4muddyfeet)
Published 08/07/2017 at 05:17
by "4muddyfeet - bare knuckle with an EZ30" (4muddyfeet)
Published 08/07/2017 at 05:17
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Here’s some diagnosis fun for Oppo this morning. The Defender has developed a rev dependant (and quite loud) chirp coming from somewhere inside the engine bay. It starts and maintains itself from low to mid revs, and completely disappears from mid to high revs. The aux belt and all pulleys are in good condition, but there is slight play in the tensioner pulley, maybe 2mm play front to back. As this thing ex-MoD, the timing belt is on an unknown schedule and completely unknown mileage. As it happens in all gears, I’m negating anything after the clutch, so must be between clutch and engine, or engine and belts. Any thoughts?
"BvdV - The Dutch Engineer" (dutchengineer)
08/07/2017 at 05:27, STARS: 0
Sounds similar to a chirp I’ve got going on in the Twingo, mine is not very loud though. Sadly can’t help with a diagnosis, as I don’t know certainly what it is in my case. It’s not always present, which makes it hard to diagnose, but the shop thinks it might be a tensioner on the accessory belt. I hope it will be gone when they take all of that off to reach the timing belt later this year.
"pip bip - choose Corrour" (hhgttg69)
08/07/2017 at 06:01, STARS: 0
belts / tensioner area
"RamblinRover Luxury-Yacht" (ramblininexile)
08/07/2017 at 09:36, STARS: 0
Outside my expertise, sorry mate. I thought yours was a 2.5 and would thus have a timing chain, but I might be mistaken - certainly wouldn’t be a chain chirping, I would think.
Your local shops have a mechanic’s stethoscope?
Second thought - if’s it’s a belt chirping away, puffing a little corn starch/baby powder on the belt will make it quiet up for a bit if it’s that.
"4muddyfeet - bare knuckle with an EZ30" (4muddyfeet)
08/07/2017 at 09:37, STARS: 0
That was my first thought, but I gave any and all visible spindles a shot with WD40 to no avail. I’m hoping it’s just the tensioner. I didn’t replace it on the last belt change.
"4muddyfeet - bare knuckle with an EZ30" (4muddyfeet)
08/07/2017 at 09:39, STARS: 0
300tdi so Belty Beltsville, TN. Most likely, they’re a reasonably well kitted-out outfit. Considering its unknown service history, I may just get the belt done as a matter of course.
"RamblinRover Luxury-Yacht" (ramblininexile)
08/07/2017 at 09:50, STARS: 0
Wise, I’d think. Diesels requiring more force from the timing kit than petrol by some margin, and being in for more catastrophic hurt in a failure by some margin even than a “normal” interference engine...
"way2blu does a rev update" (way2blu)
08/07/2017 at 10:14, STARS: 0
Between 2,000-3,000 RPM in my MR2, the heat shield resonates with the engine and makes a loud buzzing sound. I’m not sure your’re experiencing the same kind of issue (mine’s more of a buzz than a chirp) but it might still be worth checking other items in the engine bay that might be resonating at low revs. Probably the belt though, as others have suggested.
"4muddyfeet - bare knuckle with an EZ30" (4muddyfeet)
08/23/2017 at 11:48, STARS: 1
Because you’re interested in such things; When I was investigating the chirp I had the 110 up and gave it a general check over. I noticed that the front UJ was shot in the front prop shaft, so much so that the pin had started to oval. Anyway, I don’t fuck about with UJ’s because I hate circlips with a passion, so I replaced the whole prop this afternoon. No more chirp... It’s funny how noise translates, I would’ve sworn that the noise was front of engine and rev-dependant. The fact that it actually came from the drivetrain has me really surprised. I’m suspecting that it was a torque/stress-based chirp only because it happened in all gears within the same rev band...(?)
"4muddyfeet - bare knuckle with an EZ30" (4muddyfeet)
08/23/2017 at 11:49, STARS: 0
Oh. And the rear diff took a litre. A litre. My bad.
"RamblinRover Luxury-Yacht" (ramblininexile)
08/23/2017 at 12:25, STARS: 1
I got into the rear diff on the Galaxie months back - same time as I did a pair of very dry and crusty U-joints myself, and as it’s not the sort with a drain plug, the contents were dark brown and tarry. Probably hadn’t been changed since the ‘70s at latest. Drew it out with a gear oil syringe, refilled, and as it’s the famously sturdy Ford 9", it ought to be right as rain for another 90,000 miles.