Info on oil pan

[tom135]

Hi All:

I got a quick question I hope somebody could answer.

I have a 1989 4.3L Mercruiser and would like to put a quick oil change fitting in place of the oil drain bolt. My question is, what is the size of the drain bolt that is in the oil pan. There are different sizes of kits, and I want to be sure I get the proper one.

Thanks for any help, it's much appreciated.
Cheers
Tom

 

[Bondo]

Re: Info on oil pan

My question is, what is the size of the drain bolt that is in the oil pan.

Ayuh,... It Should be 1/2" fine thread...

 

[tom135]

Re: Info on oil pan

Thanks for the info Bond-O, dose 1/2-20 sound right?

 

[Bondo]

Re: Info on oil pan

Ayuh,...

 

[zbnutcase]

Re: Info on oil pan

Just beware if your engine has been changed to a later vortec by chance, it will have a cast aluminum oil pan and those threads are metric. 'nutcase

 

[tom135]

Re: Info on oil pan

Thanks for the tip nutcase. I looked and it is a steel oil pan. So I think I'll be ok.

Cheers
Tom

 

[rodbolt]

Re: Info on oil pan

why not simply suck it out the dipstick tube as designed ?

 

[cr2k]

Re: Info on oil pan

Unless you change your oil like 7 times a summer those bottom drains aren't very good. All the gunk in the oil will settle there and plug or partially plug the hose and banjo fitting.

Last one I tried to use...I left it draining overnite (summer 80 deg all nite) and still sucked out over 2 qts of oil the next day via the dipstick.

If you do look at one, take a look at the hole sizes in the bolt. You will see what I mean.

 

[tom135]

Re: Info on oil pan

Thanks fo rthe suggestion. My concern withsucking out the oil from the dipstick is that I would not be able to get all the sludge from the bottom. Not sure if this is a valid concern, as I have never changed the oil in a boat engine before. I think I will stick with the regular method.

Cheers
Tom

 

[ziggy]

Re: Info on oil pan

I think I will stick with the regular method.

why not simply suck it out the dipstick tube as designed ?

sounds like that is the regular method...

my boat is old and sucking it out the dipstick tube is not the regular method. though i don't know what is as my drain plug is non removable w/o tilting the engine up. that said. i love my engine oil siphon. aftermarket through the dip stick tube. i use a plastic tube down that goes down the dip stick tube. it reaches the bottom of the pan. after i suck all the oil out. i know i've got all of the oil out as i can tap the bottom of the pan with the plastic tube of the oil siphon. you can hear the ting ting ting of an empty oil pan.... them oil siphons really work good. imho... oh, forgot to mention the lack of mess with using an oil siphon too. very clean way to change oil...

 

[fishinpa]

Re: Info on oil pan

Unless you change your oil like 7 times a summer those bottom drains aren't very good. All the gunk in the oil will settle there and plug or partially plug the hose and banjo fitting.

QUOTE]

well you should not have any Gunk in your Oil.


If you do sounds like your pump isnt doing avery good job when you are changing oil.



fish

 

[dpoff]

Re: Info on oil pan

You might want to look at the angle of your boat if it is on a trailer and crank the trailer up or down to get the oil to drain properly.