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loud whining noise from engine HELP!

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Old 01-08-2018, 11:10 PM
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loud whining noise from engine HELP!

Ive had my G35 6mt stored away for about 3 months, i had my plenum off because i was polishing it. i put everything back together, all the bolts are tight, put the battery back in, go to start it, it starts but right away it makes a really loud whining noise from the engine and suddenly dies couple seconds later, i need help
Old 01-09-2018, 12:48 PM
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Is a belt squealing? Do you have a video of the sound?

Was the plenum off for the entire 3 months and was the opening adequately protected? You might have a critter in the engine that is squealing?

Old 01-09-2018, 01:10 PM
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Originally Posted by [email protected] View Post
Is a belt squealing? Do you have a video of the sound?

Was the plenum off for the entire 3 months and was the opening adequately protected? You might have a critter in the engine that is squealing?

I do have a video of me inside the car starting it, not sure how iíd post it here though, the plenum was off roughly for 1 month, in an in closed garage. iím not sure if itís a belt because iím unable to go up to the engine bay to hear exactly where itís coming from because it will not idle, it dies if i donít give it a little gas. iím going to have my friend hold rpm so i can hear where itís coming from. it doesnít really sound like a belt, itís very loud, almost need ear plugs.
Old 01-09-2018, 01:36 PM
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Sounds like a belt or a pulley. Funny thing is the exact thing happened to me yesterday. Loud noise while driving and then POP BANG. Idler pulley left me stranded for three hrs on the side of the road. Check your pulleys and belts
Old 01-09-2018, 03:06 PM
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If it won't idle at all I'd doublecheck the manifold gasket, you may have pinched the oil fill neck (very common mistake) and have a massive vacuum leak. Since the belts are easy to remove you can just take them off and spin all the accessory pulleys (and tensioners) by hand, if one has a bearing problem it will be unmistakable when turning it by hand.

Post video's to youtube and put the link here it will embed the video automatically.
Old 01-09-2018, 03:35 PM
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Originally Posted by zachdillon View Post
Ive had my G35 6mt stored away for about 3 months, i had my plenum off because i was polishing it. i put everything back together, all the bolts are tight, put the battery back in, go to start it, it starts but right away it makes a really loud whining noise from the engine and suddenly dies couple seconds later, i need help
well, i found my problem, my plenum was pinching my oil fill rubber neck thing, it was causing a vacuum leak! i took off plenum, got the rubber piece out of it, bolted it back, started and ran like a charm!
Old 01-09-2018, 03:43 PM
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Yep, SUPER common when putting the plenum back together. Glad everything is working now.
Old 01-09-2018, 10:24 PM
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Yep, SUPER common when putting the plenum back together. Glad everything is working now.
thank you !!(:
Old 01-13-2018, 06:18 PM
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So nice when it is something that easy.

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