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Ticking noise while starting, and short hum after turning over.

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
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abscate  
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Re: Ticking noise while starting, and short hum after turning over.

Post by abscate »

The sun is up, the birds are singing, and the MVS Ban Hammer is swinging….
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volvolugnut
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Post by volvolugnut »

The MVS Thor Hammer swings again!

Now back to the previously scheduled program. What about the tick and hum?

The P2 Electronic Throttle Module will hum for a few seconds after initial key turn. Not sure if you have this on yours.

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Post by scot850 »

It's a 98 so no ETM hum. It is usually just a few seconds before start up for the throttle plate to adapt for start.

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
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Post by scot850 »

Just checked back on the posts on this. Another one has disappeared. I suggested removing the serpentine belt and seeing if it is a bearing on the alternator/ PS pump/AC compressor or tensioner. Also using a stethoscope or long screwdriver with the serp belt of (for safety) check the area of the timing belt on start up for noise.

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

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misha
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Post by misha »

The sound is not from starter or bendix.

Something else is making that sound.
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Post by scot850 »

Something else that makes a noise like that is the engine oil cooler thermostat when they get older. Looking at your engine it looks like a non-turbo so they don't usually have those fitted. As some markets can vary, are there any pipes going into the RH (from drivers seat) back of the radiator, on the opposite side from the auto-trans oil cooler lines?

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

Camaro737
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Post by Camaro737 »

I could check by pulling off the belt, I won't be able to get to that for a few weeks though. The strange part is the fact that those noises never happen after starting. This whole situation is weird, 2 mechanics checked it and said nothings wrong but the noises happen and I feel like I'm going crazy. But I like the idea alot I will do that sooner than later. If I can't figure out the noise soon I'm just going to get the timing belt replaced and have the real volvo mechanics figure it out. But I'm not giving up hope

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