A 2QM20 actually has 3 locations for zincs. The rear plate on mine is tapped for a zinc, the stud of the Zinc does not go thru the plate. The plate is held on with 4 bolts. It does need a thin paper gasket around the inside edge. The one in the front of the engine in this video is also fitted into a plate & uses a paper gasket. If the square, screw in fitting is stuck, you can unbolt the plate and use a vise to loosen the Zinc fitting or just unscrew the zinc from the back of the plate & replace it. Both of these zincs use a rubber washer between the Zincs & the plates. I use some permatex gasket cement on the gaskets to prevent leaks. There is a third zinc in the 3 way raw water fitting that is also on the front of the engine, 3 zincs total. I've been changing mine regularly for 38 years.
2QM20H comes out with 2 anodes in the head as standard, , did you consider the fact that not if but when the anode melts it's going to errrr leave a hole for pressurised water to come squirting out of?
That will not work as the gasket will act as a insulator. The zinc has good electrical connection, but the plate is not directly contacting the engine block. (Atleast not well, only through the bolts which may or may not be a good idea. Check your zinc and if it hasn't disappeared, then you know it didn't work.
A 2QM20 actually has 3 locations for zincs. The rear plate on mine is tapped for a zinc, the stud of the Zinc does not go thru the plate. The plate is held on with 4 bolts. It does need a thin paper gasket around the inside edge. The one in the front of the engine in this video is also fitted into a plate & uses a paper gasket. If the square, screw in fitting is stuck, you can unbolt the plate and use a vise to loosen the Zinc fitting or just unscrew the zinc from the back of the plate & replace it. Both of these zincs use a rubber washer between the Zincs & the plates. I use some permatex gasket cement on the gaskets to prevent leaks. There is a third zinc in the 3 way raw water fitting that is also on the front of the engine, 3 zincs total. I've been changing mine regularly for 38 years.
Is that an Endeavour 32? That engine access looks very familiar.
James Levens Yep! Sure is!
Looks just like my E32 engine room. I am in the middle of putting in a new diesel tank. Love my 1978 E32.
SV All Aboard Best of luck to you! I love my E32 as well!
Local rigger is almost done putting the new rigging on her. I am so looking forward to getting her back onto the water.
2QM20H comes out with 2 anodes in the head as standard, , did you consider the fact that not if but when the anode melts it's going to errrr leave a hole for pressurised water to come squirting out of?
The anode has a steel core with threads.
3 zincs is standard for these engines. To in the front and one in the back.
That will not work as the gasket will act as a insulator. The zinc has good electrical connection, but the plate is not directly contacting the engine block. (Atleast not well, only through the bolts which may or may not be a good idea. Check your zinc and if it hasn't disappeared, then you know it didn't work.
The bolts are metal....
the engine is supposed to have two anodes
3 anodes.
Trash. Dont follow this explanation. The motor needs two zincs
3 zincs.