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Post by MY CAR » Tue Mar 31, 2020 3:05 pm

Hi ,Help needed please,Just started car after short lay up and found there is a noisy tapping from the rocker cover area .It was not there before,any ideas please.The only thing different is that I replaced gasket when I had the rocker cover repainted.
Thanks
Alan



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Post by manny » Tue Mar 31, 2020 3:20 pm

Good day Allan,

did you allow the car to idle for a 15-20 seconds before switching it off....also the oil level correct, i think the hydraulic tappets do take a few seconds to pressurise, also recheck any bolts on\around the cover...been there before...

Ta

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Post by Dcrosby13 » Tue Mar 31, 2020 4:00 pm

Which engine does it have Alan?


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Post by manny » Tue Mar 31, 2020 4:03 pm

Dcrosby13 wrote:
Tue Mar 31, 2020 4:00 pm
Which engine does it have Alan?
ah.. learned folk....



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Post by philhoward » Tue Mar 31, 2020 4:07 pm

Hi Alan,

It's a 1600, I believe? If so, assuming the oil level is correct, the tappets can take a while to refill if they're past the first flush of youth and not been run for a while. It might take until the engine has warmed a little before they quieten down (when the oil starts to thin).


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Post by Alan SS1 » Tue Mar 31, 2020 5:54 pm

philhoward wrote:
Tue Mar 31, 2020 4:07 pm
Hi Alan,

It's a 1600, I believe? If so, assuming the oil level is correct, the tappets can take a while to refill if they're past the first flush of youth and not been run for a while. It might take until the engine has warmed a little before they quieten down (when the oil starts to thin).
concur, and it might take what seems an eternity!!! maybe five minutes then turn off and try a wee while later, maybe the heat soaks into help free off I don't know. it has only happened once since got the car and it has been laid up every year for the last 15 for each winter


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Post by efi_sprintgte » Tue Mar 31, 2020 5:59 pm

What viscosity oil is being used?


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Post by MY CAR » Thu Apr 02, 2020 10:50 am

Thanks for your help .Left it running for some time but still no joy.It is a 1600 ,using Dynomat 20/60 oil.Have not tried the cover bolts but can I run the engine with cover off to see if it makes a difference.
Thanks
Alan



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Post by philhoward » Thu Apr 02, 2020 11:18 am

20/60 is too thick for the oil - 10W40 would be my choice.


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Post by MY CAR » Thu Apr 02, 2020 3:28 pm

Ok thanks can I start engine with rocker cover off to see any difference
Alan



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Post by philhoward » Thu Apr 02, 2020 3:36 pm

I've never tried it - there may well be oil distributed everywhere..


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Post by MY CAR » Thu Apr 02, 2020 4:30 pm

Just undid all new rocker bolts lifted cover up slightly and noise stopped so it's catching on tappets somewhere.If I pull cover over and with it in position noise not there ,are there different thickness of gasket ,or I could try and put some larger washers on maybe but with your help seems to be getting somewhere thanks
Alan



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Post by philhoward » Thu Apr 02, 2020 4:35 pm

Genuine (cork) gaskets have small metal pins so you can't (should be able to) over-tighten them. Did you use a new gasket? Check the mounting face of your cover is totally flat too - a metal rule across the edges will show any high/low spots.

I suspect there's likely to be a small witness mark on the underside of the rocker cover where it's been catching, It might be on one of the plates on the underside that form the vapour trap? If so, a gentle tap with a hammer might fix it if a new gasket doesn't.


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Post by MY CAR » Fri Apr 03, 2020 5:55 pm

Just to say thanks for all your help on rocker cover problem I am relieved to say all sorted now when I removed cover found the cause (not saying anything)Phill said I was using oil to thick found out most people use 10/40 semi synsthetic I s that ok what make would you use is Dynomat a good make thanks again
Alan



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Post by philhoward » Fri Apr 03, 2020 6:13 pm

Do you mean Dynolite oil? I see Moss sell it as a replacement for the old 30W monograde in 20/60 weight which is far too heavy for something with hydraulic tappers like the CVH.


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