Annual Engine Service

Having taken Patience out for the last significant cruise of the season and with the autumn evenings drawing in, it is time to give her engine its annual service, including this year, replacing the antifreeze.

The first task was to drain the cooling system, with the engine cold, and refill with a 50/50 mix of blue ethylene glycol antifreeze and water, see earlier blog for more details. This year I was able to buy a single container of 20 litres of Triple QX Blue Antifreeze from Euro Car Parts in Cambridge for a lower price than three separate 5 litre containers. That not only saved us money, but allowed us to get the mixture right up to 50% and also keep two or three litres spare for topping up.

Then, with the engine warmed up, I changed the oil and oil filter. The sump pump on the BMC 1.8 litre engine makes this a relatively quick and easy task compared to changing the anti-freeze.

I then replaced the fuel filter, which should also be done with the engine warmed up, as it makes for easier starting after the swap. This is rather a messy job, as it is impossible to avoid all the fuel in the old filter going down into the engine sump. The old filter looked to be nice and clean, which suggests that the fuel is also in good condition. After reassembling the bowl with the new filter and sealing rings, I was very careful to make sure I bled the fuel filter of any air before trying to start the engine. Air in the system has caused headaches on previous occasions, see earlier blog.

As the tappet clearances had been checked earlier in the year, I left these for another time, but I did check the drive belt tension, which was fine.

Finally, it only remained to take the old oil and antifreeze solution down to the local recycling centre, who seem increasingly reluctant to take antifreeze solution, especially when you are trying to offload about 32 litres of it!

Outlets and gutters

Water water everywhere - which is hardly surprising in a canal environment, but we do find that more water than we'd like ends up in the engine compartment. For a while we added a little tub that caught drips through the engine hatch, but recently the situation seems to have become worse. Where was it coming from?
John tightened gaskets, jubilee clips and checked hoses, but there was no clear culprit. Until now.
A gutter surrounds the engine compartment and should collect surface water towards the stern and into two outlets, directing the water out into the canal. However on close inspection the outlets, hidden in the hull, have small holes and also are low in profile. This means that surface water decays leaves which clog the gutters and water flows over the low edge or through the small holes and ends up in the engine compartment bilges.

It's not so bad that it activates the bilge pump but it's not too good to have water in the bilges.
So John scrubbed the gutters, cleaning them of leaves and scraping away loose material and rust. Then with coats of anti-rust, red oxide, grey undercoat and two coats of gloss, he firmed up the gutters. The rear gutter was more difficult as this acts as a hinge for our hatch - hence in this picture it remains red, though it will be painted again next time.
The outlets, under the rear corners of the gutters, were cleared as far as possible, then a layer of fibreglass added to build them up. Now after several weeks buckets under each outlet remain empty even after rain, so John's treatment seems to have worked.
Next we are to take Patience up to North Kilworth for bottom blacking and for a new hatch, as the present one not only lets in the water but is slippery on the surface and crumbling at the edges. Patience has been cleaned and polished in preparation for her grooming session at Kilworth and is excited about spending a week there!