Re-sealing valve covers without engine removal?
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Joined: Mar 2024
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2021 Mercedes-AMG C63 Coupe
Re-sealing valve covers without engine removal?
My 2021 C63 coupe (M177) has oil in 2 spark plug holes, one per bank.
I want to re-seal them but I don't have a lift.
I've done the oil separators (removed front bumper, AC/radiator package to do it), and I know that's a prerequisite to removing the front covers from the valve covers/cylinder heads.
I'm just not sure there's clearance to pull the valve covers off.
Has anyone removed and re-sealed their valve covers without removing the engine from the car?
I want to re-seal them but I don't have a lift.
I've done the oil separators (removed front bumper, AC/radiator package to do it), and I know that's a prerequisite to removing the front covers from the valve covers/cylinder heads.
I'm just not sure there's clearance to pull the valve covers off.
Has anyone removed and re-sealed their valve covers without removing the engine from the car?
Last edited by sreit; Yesterday at 09:49 AM.
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Joined: Dec 2025
Posts: 443
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From: Keep it simple - keep it OEM
AMG C63s Coupe
Thread Starter
Newbie
Joined: Mar 2024
Posts: 6
Likes: 1
2021 Mercedes-AMG C63 Coupe
There's very little space in the engine bay.
And I'm wondering if there's some component in the way that I'm not aware of and that can't be removed without removing the engine, e.g. the intake manifolds.
So I'm wondering if anyone's actually done the job.
Have you done the job without removing the engine?
And I'm wondering if there's some component in the way that I'm not aware of and that can't be removed without removing the engine, e.g. the intake manifolds.
So I'm wondering if anyone's actually done the job.
Have you done the job without removing the engine?
Senior Member
Joined: Dec 2025
Posts: 443
Likes: 39
From: Keep it simple - keep it OEM
AMG C63s Coupe
No. But it sounds unusual to put engine out for this.
I am wondering that your 2021 er Sealings are bad!
Do you use syntetic oil ?
Are you sure that the sealings are bad ?
Look in WIS ? … there should documented how it goes to replace this sealings.
How much miles have your car ?
maybe someone uploading this pdf for you.
I am wondering that your 2021 er Sealings are bad!
Do you use syntetic oil ?
Are you sure that the sealings are bad ?
Look in WIS ? … there should documented how it goes to replace this sealings.
How much miles have your car ?
maybe someone uploading this pdf for you.
Last edited by C63s_Jack; Yesterday at 11:58 AM.
