2017 GLS550 148k Service
Posted: Mon Jul 07, 2025 9:30 pm
Standard oil change, filter.
Noted a significant oil leak formed above the drivers side down pipe flange. At first I thought the turbo seal had blown and oil was leaking out of the exhaust, but on closer inspection I think its leaking from somewhere around the top of the drivers side cylinder head/valve cover area. Couldn't see well. I wonder what are common leak points there I should go after. Hopefully it doesn't get significantly worse before my next oil change. Wasn't dripping onto or off of the underbelly cover, so i guess it isn't that bad yet.
- Both cover hold down tabs on the engine compartment fuse cover broke off the fuse box base. Zip tied around to keep the cover on and dirt out, but that kinda sucks.
- Need to order a couple of steel spring clips for the center plastic cover on the engine - there are so few I should've left it off already. Not sure how to find the PN.
- Some belt accessory noise starting. Need to order the top center idler pulley and maybe the upper left one. Others felt OK.
Help me out with part numbers for at least the last two when you have a chance.
Noted a significant oil leak formed above the drivers side down pipe flange. At first I thought the turbo seal had blown and oil was leaking out of the exhaust, but on closer inspection I think its leaking from somewhere around the top of the drivers side cylinder head/valve cover area. Couldn't see well. I wonder what are common leak points there I should go after. Hopefully it doesn't get significantly worse before my next oil change. Wasn't dripping onto or off of the underbelly cover, so i guess it isn't that bad yet.
- Both cover hold down tabs on the engine compartment fuse cover broke off the fuse box base. Zip tied around to keep the cover on and dirt out, but that kinda sucks.
- Need to order a couple of steel spring clips for the center plastic cover on the engine - there are so few I should've left it off already. Not sure how to find the PN.
- Some belt accessory noise starting. Need to order the top center idler pulley and maybe the upper left one. Others felt OK.
Help me out with part numbers for at least the last two when you have a chance.