Waterpump Paper Gasket

[Yara]

Common question. Raw Water Pump Gasket | Sailing Forums, page 1
Summary, thickness is 0.15mm, same thickness as my chart, but the genuine article was cheap and easy to obtain.
BTW 0.005 inch is ~0.13mm.

 

[lw395]

Permatex® Ultra Black® Maximum Oil Resistance RTV Silicone Gasket...

On one of my boats, the previous owner had used RTV for the rocker cover gasket.
It did the job, but I found lots of bits of it in the sump.
Any excess can be squeezed into a bead which may break off inside the engine.
It has its uses, but any sign of 'gorilla snot' on an engine is usually a clue that the bodgers have been in town.

 

[Spirit (of Glenans)]

A bit of brown paper, and a pair of scissors. PBO.

In the days when I used to tinker with motorbikes we would make a paper gasket by holding the paper in place with one hand while tapping all the way round the edge of the item with a spanner, thus scoring the paper accurately before cutting out.

 

[Spirit (of Glenans)]

Did you ever have old British bikes Vic

Triumph Tiger Cub, then a T90. Refillable mobile oil wells!!

 

[[159032]]

On one of my boats, the previous owner had used RTV for the rocker cover gasket.
It did the job, but I found lots of bits of it in the sump.
Any excess can be squeezed into a bead which may break off inside the engine.
It has its uses, but any sign of 'gorilla snot' on an engine is usually a clue that the bodgers have been in town.

Anyone can make a pig's ear of using it.
Most vehicles use RTV for everything. If you don't feel confident in makings a good seal without use agasket. Many manufacturers specify itfor joints. Over 20 years ago I was surprised that Renault specified their own-brand RTV for a sump joint.