|
I’d
like to service the oil cooler on my 1992 model 740 Volvo Penta stern
drive engine. There is no problem getting the unit off, but before I tinker
with it, I would like to know if there is a recommended method for taking
it apart, cleaning it, and putting it back together. J.H., via
e-mail
Although
this is a relatively straightforward procedure (refer to the exploded
illustration above for guidance), I highly recommend getting the engine
manual for this model before you begin.
First
drain the engine oil and remove the oil filter. Disconnect the inlet and
outlet lines from the oil cooler, and discard the sealing rings so that
when it comes time to put everything back together, you won’t forget
to install new ones. Secure the cooler in a vise after you have padded
its jaws to prevent damage. Don’t overtighten the vise, as you may
damage the cooler housing.
Now
loosen and remove the through-bolt and discard the O-ring. Remove the
front and rear covers, and discard these O-rings as well. Remove the cooler
element from the housing, and examine it for deposits. Soaking the element
in muriatic acid for about two hours will loosen up any such residue so
you can easily remove it. Muriatic acid, available at any swimming pool
supply outlet, is caustic, so wear gloves and protective eyewear. (Safe-React
(404) 341-5313, www.safe-react.com,
manufactures a product called Formula E that it claims is a safer alternative.)
After
soaking it, rinse the element with fresh water. If you notice solid deposits
still present, especially on the inside, gently scrape them off with a
half-inch-diameter dowel or similar soft tool. If there’s excessive
buildup, soak the element for an additional hour and rinse it; you can
blow it dry with compressed or canned air. Insert the element into the
cooler housing, and install the front and rear covers with new O-rings.
Install the through-bolt and new O-ring and tighten securely. Reconnect
the inlet and outlet oil lines and new sealing rings, fill the crankcase
with clean oil, and install a fresh filter. Start your engine, and check
for leaks.
Next page
> Diesel Fuel Cleaning, and more > Page
1, 2
|