So I recently had my belts snap on me when I was driving on the highway and got my car home to get all the parts and everything, replaced the belts and replaced my water pump as well as a plastic hose that is connected to the cooling system so after I took my car to bavarian auto jays in my town to replace my thermostat and thermostat housing gasket, after I got the car back everything runs fine but now my thermostat sits a millimeter or two from the halfway point which is the normal temperature, it doesn't ever get close to the 3/4ths mark, and when I accelerate and shift around 3500 to 5000 RPM's I notice the faint hissing/whistling noise rise and fall with the Rpms. I check mostly all my hoses, the ones I could get to, and I noticed my coolant was low after driving it home from bavarian autohaus. Anyone have any idea please?
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M42 hissing/whistling???
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First, use more punctuation and paragraphs, as it makes your issue easier to read.
Hissing could be a hose with a vacuum leak, but you'd notice that at all RPM and especially not just at 3500-5000. Therefore, you might have a coolant leak, but it's odd that it wouldn't cause overheating.
Whistling is usually a vacuum leak, normally between metal surfaces of the intake manifold or their gaskets, which can get much louder at RPM.
Which hose did you replace anyway since I cannot think of a plastic hose in the system?
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Originally posted by dktmllr View PostThey just fixed my thermostat I replaced the water pipe connector myself as well as the belts but I'm sure they took them off to access the thermostat
Like I said in the last post, a whistling is probably a leak between the manifolds. If it sounds like this https://photos.app.goo.gl/zzKHZZOq7MxPDfrl2 it's probably a metal/metal leak.
The shop probably didn't remove belts to replace the thermostat, so I'd check them, but not suspect them.
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The weird thing is it's not loud like in your video and it doesn't sound like metal more like escaping pressure I I get high in the rpms, I also didn't remove either parts of the manifold cause it sits pretty low under the manifolds on the block so all I had to do was undo the five bolts that hold the wiring harness in the place and kind of took it out of the way when I removed some of the electrical plug-ins seated it in there tightened the coolant pipe down and connected all the hoses back on
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Yeah my idle is normal, it sits around 800-900 RPM's , it rumbles a tiny bit for a second in increments when it's cold but I believe that's just normal with these old cars am I correct? I'm stumped because I tried the cold idle and spraying around the hoses and I take manifold and there was zero change in the idle. That's the only reason I posted in the forum cause I'm stumped honestly
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Originally posted by dktmllr View PostYeah my idle is normal, it sits around 800-900 RPM's , it rumbles a tiny bit for a second in increments when it's cold but I believe that's just normal with these old cars am I correct?
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