Loud noise behind valve covers


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BigJim2000SE
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Loud noise behind valve covers

Post by BigJim2000SE » Sat Feb 09, 2019 12:31 pm



Several months back I had an issue with my 2000 GL 1500 SE I was losing clutch fluid it appeared it was leaking through the slave cylinder into the block according to what I was told on the Forum I replaced everything got it up and running everything's nice and correct however when I started it yesterday I'm getting very loud noise rattling on both sides behind the valve covers I did change the oil before I started it again after the repair and then I change the oil one more time after that does anyone have any suggestions it did get some what quieter as it warmed up but it never did go completely away I'm afraid maybe the brake fluid deteriorated the oil pump or something thereabouts and it's not circulating oil to the valves as it should does anyone have any suggestions or ideas of what to do



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Erdeniz Umman
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Re: Loud noise behind valve covers

Post by Erdeniz Umman » Sat Feb 09, 2019 3:48 pm

Have you checked the timing belt tensions? Or have you done something in there?
Here is the video that I have recorded about a similar issue. You can find the details in the link given under the video.



https://www.goldwingfacts.com/forum/2-g ... ost4814049
Last edited by Erdeniz Umman on Sat Feb 09, 2019 3:54 pm, edited 1 time in total.

BigJim2000SE
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Re: Loud noise behind valve covers

Post by BigJim2000SE » Sat Feb 09, 2019 3:53 pm

I have not,, the only thing I've done was replace the clutch cable from the handlebar Reservoir down to the slave cylinder, removed and rebuilt slave cylinder reinstalled , reinstalled alternator then fluids

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Erdeniz Umman
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Re: Loud noise behind valve covers

Post by Erdeniz Umman » Sat Feb 09, 2019 3:56 pm

Also the alternator can make noise if the rubber dampers inside are bad.

BigJim2000SE
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Re: Loud noise behind valve covers

Post by BigJim2000SE » Sat Feb 09, 2019 3:57 pm

My biggest concern was maybe the brake fluid be mixed with the oil they have deteriorated any rubber Parts on the oil pump that there may be causing it to not pump enough oil to keep the valves lubricated and also if the timing belt is rubber maybe it damaged it as well? And I know that brake fluid damn sure plays hell on body parts !!!!!! so it may as well just shoot a rubber up to I'm sure

BigJim2000SE
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Re: Loud noise behind valve covers

Post by BigJim2000SE » Sat Feb 09, 2019 4:09 pm

Okay I'll give it a look however mine is doing it at cold start up and gets a little quieter actually when it gets warm and I have not done anything with the timing belts so could this still be a possibility?

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tfdeputydawg
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Re: Loud noise behind valve covers

Post by tfdeputydawg » Sat Feb 09, 2019 8:01 pm

How would brake fluid get mixed with the oil???

BigJim2000SE
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Re: Loud noise behind valve covers

Post by BigJim2000SE » Sat Feb 09, 2019 8:09 pm

I was told it leaked through the Piston seal that goes into the back of the case

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offcenter
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Re: Loud noise behind valve covers

Post by offcenter » Sun Feb 10, 2019 2:59 pm

My first thought is that the noise could be from a hydraulic valve lifter that is sticking.
I have had this happen occasionally at start-up, but once the oil pressure builds, the
lifter pumps up and the noise goes away.
George in Jersey.
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WingAdmin
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Re: Loud noise behind valve covers

Post by WingAdmin » Tue Feb 12, 2019 9:14 pm

BigJim2000SE wrote:
Sat Feb 09, 2019 8:09 pm
I was told it leaked through the Piston seal that goes into the back of the case
Yes...if the clutch fluid was "going away" and there was no visible leak, then it was leaking into the crankcase.

This is EXTREMELY BAD.

How long was this going on, do you know? Did you refill the reservoir a few times?

The problem is...hydraulic fluid when mixed with engine oil will destroy the lubricity of the smooth bearings (crank journal bearings). If you run the engine for any amount of time like this the bearings and the crank will be damaged beyond repair. The solution for that is a new engine, because fixing it costs more than a replacement engine.

If you've had hydraulic clutch fluid in your oil for any amount of time, and your engine is now making loud noises that aren't going away, I'm afraid you may need to start shopping for a new engine.



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