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Old Apr 30th, 2019, 14:58   #1
reise
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Last Online: Oct 25th, 2021 10:41
Join Date: Nov 2013
Location: Magna Grecia
Default Unknown hole in head of B5254T on Volvo C70 2.5T

Hello.

Under the engine spark plug cover, there is a large hole with two small threaded holes close to it.
When I bought my C70 the hole was empty and dry.
I show this hole in the next photo.
The photo dates back to 2012.



In 2014 the water cooler started to have a small liquid leak. I should have immediately replaced the radiator, but I used it for another year and a half. Then the water loss from the radiator was increased.
So I bought a new radiator and with the occasion I had the head gasket, distribution kit, other work replaced. However from that moment engine oil started to come out of that hole that was once dry.
I show this hole in the next photo.
The photo dates back to 2016.





The mechanic did not want to take responsibility for the damage.
And instead he "solved" the problem by plugging this hole, to my great disappointment. I haven't had engine oil leaks since then, and the car works great, but I don't know if this was the right solution.
What is this hole for?
I show this hole in the next photo.
The photo dates back to 2017.



Attached Images
File Type: jpg Hole B5254T Head.jpg (170.0 KB, 110 views)
File Type: jpg DSC_0033.jpg (155.4 KB, 108 views)
File Type: jpg DSC_0035.jpg (180.0 KB, 109 views)
File Type: jpg DSC_0053.jpg (226.2 KB, 107 views)
File Type: jpg DSC_0054.jpg (215.5 KB, 109 views)
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Volvo C70 2.5T Coupè 1998 AW50-42 Garnet Red Metallic
Mercedes-Benz CL 500 2002 Brilliant Silver
Honda CBX 550 F Candy Red and Clamshell White Pearl
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