I am sick to my back teeth of my CAV filter, I can only imagine changing it in a seaway being a flipping nightmare, so I want to swap for a spin on. Additionally, the bleed screw on my fine filter housing was stripped, so I tried to repair the thread, however, it now slightly leaks (as I cut the thread slightly pissed ::)), even with a doubty washer, so I want to replace the two. The set up is pictured below:
(https://i.imgur.com/s5Gfcnql.png)
(https://i.imgur.com/G2C6p60l.png)
(https://i.imgur.com/SrDONjGl.png)
The master plan is this:
- Replace the CAV with a spin on Cav with a primer like this one: https://www.ssldieselparts.co.uk/primer-with-small-screw-filter-p-275.html
- Replace the Fine Filter housing with this one: https://www.parts4engines.com/volvo-penta-d2-55-fuel-filter-head-assembly/
(https://i.imgur.com/PNc4QYP.png)
- I presume the pipes and fittings on the fuel pipes (currently banjos) would need to be changed? To what though!
Are the ports on the old CAV 14mm like the new one will be? Have I missed any critical step out?
I note they are banjo fittings on the old fine filter housing - what would I use on the new housing?
I do not changed anything. I have your solution in Cruiser 40.
Simple add a transparent filter on line between tank and fuel cock. It is simple to watch if there is dirty, and simple and quick change it before dirt go to other filters
Here's what I did when my CAV housing pissed me off: http://bavariayacht.org/forum/index.php?topic=1560.0
That'll work.
When I did my re-power, I swapped the CAV for a Chinese fake Racor unit (was about £30 complete). Makes life a lot easier and cleaner.
I also added an outboard bulb primer in the feed pipe between the tank and the primary filter, which makes bleeding it a doddle.
Quote from: IslandAlchemy on December 08 2021, 09:35
That'll work.
When I did my re-power, I swapped the CAV for a Chinese fake Racor unit (was about £30 complete). Makes life a lot easier and cleaner.
I also added an outboard bulb primer in the feed pipe between the tank and the primary filter, which makes bleeding it a doddle.
Likewise...I fitted a Chinese 'Racor' and an outboard bulb....
We also fitted a 'sight glass' with a screen filter just before the fuel cock...........
Makes life so simple.
(Only issue was the large size of the Racor style filter in comparison to the CAV, so a relocation was necessary)
https://www.racornews.com/single-post/2016-1-25-mythbusters-fuel-filters?fbclid=IwAR08PWK07T-OaYfx9A1lx8cHrmTMQ9pt18xsrWzmWpCN1RyM64YiJj45Aa4
Racor is the way to go along with an outboard bulb between it and the fuel tank.
If you take the fine filter to a machine shop they should be able to mill a flat on the filter head square to the thread to line it up. Far cheaper than a replacement.
I changed my primary filter for a 'Racor type' from Amazon [/url]https://www.amazon.co.uk/Racor-Diesel-Water-Seperator-FG500/dp/B00L90437G/ref=sr_1_7?keywords=racor+filter&qid=1639043996&sr=8-7. The unit is well made and easy replacement for the old Cav filter. If you have crimped connectors on the old filter just cut through the old pipe as close to the crimp as you can and reattach to the new fittings with double hose clamps. Replacing the filter now a doddle.
Thank you all! Really useful stuff - I might just use a copper washer or a crush washer for now on the leaky bleed screw whilst I figure out if I have enough boat credits left over after Christmas spend is done...