got chocolate milk? i seem to

[ziggy]

hi folks,
well, i got me the first sign of trouble. kinda expected it really. went out for abouts 4 hrs yesterday, probably got maybe 7 hours on the engine since i got it. after runnin yesterday i was flushin it out and it didn't want to start. didn't want to turn over, but did, then started. ran well enough. thought about it over night and suspected water intrusion. checked the oil. yep. chocolate milk. didn't see any water on top of pistons after removeing the plugs. didn't blow anything out the sparkplug holes just rollin it over.
changed oil and filter. couple of shots of oil down the plug holes. started it up and broght it to operatein temp. shut down. no water in oil now..
i suspect i will again though. here's my thought,

i'm guessin this manifold and riser are oem. looks like a leak at the bottom of the manifold, and a leak at where the riser bolts to the manifold. i'm thinkin they gots to go. what do ya all think about this?

i probably shouldn't have even run it the suspected 7 hours i ran it. i figured these were bad from sqare one.......hope i didn't damage the engine. ain't done me a compression check since it's been run these 7 hrs either. reckon i ought do that too real soon. see if anything has changed...

 

[Haut Medoc]

Re: got chocolate milk? i seem to

:% Was this a rebuilt engine or just "new to you?".....
There are ways to pressure test the manifolds integrity...
I would just replace them if they are old....
I would suspect the riser/manifold, water seeping past old rings.....
Do the compression test.......
If it turns to milk again quickly, I would suspect a cracked head/block.....JK

 

[FreeBeeTony]

Re: got chocolate milk? i seem to

I wouldn't expect the manifold/riser to add water to the oil while it was running..................

 

[bruceb58]

Re: got chocolate milk? i seem to

Doesn't take much water to make the oil look like chocolate milk.

Manifold/riser issues could definitely be one cause of your problem and you wouldn't see a significant rise in the oil level.

How is the manifold leaking at the bottom? Is that caused by a crack? Maybe the engine wasn't winterized properly. If that is cracked, you may have cracks in other places too.

 

[FreeBeeTony]

Re: got chocolate milk? i seem to

I think there is a drain plug in that area at the bottom of the manifold.

 

[xtraham]

Re: got chocolate milk? i seem to

probably manifolds/ manifold and riser, the hard start was more than likley water on top of the pistons from the man/riser if the hard start was turn/grunt/turn/grunt

 

[ziggy]

Re: got chocolate milk? i seem to

the numbers
110-115-135-128-125-115
3 squirts of oil into 1 and 2. same numbers, 110-115. throttle plates and choke open.;

the numbers i had prior to ownership, no pun intended, was

125-119-130-138-125-124, these were by the merc. mech in rapid city prior to buyin it..

i'm thinkin this is a 31 year old manifold and riser. the end cap still has a oem merc sticker on it made of metel. the rust is at the bottom of the manifold. the drain is at the rear. i've seen cracked il6 manifolds. my old one off my 72 trisonic. it was freeze cracked in the back between the block and the manifold, not easy to see if still mounted, this is on the outside. i just can't help but think them babys have rusted thru from the inside out. at least that's my notion right now. might change later of corse. tenitively i'm agreein with xtraham, a bit of water on top of the piston wasn't letin me turn over. 1 revolution, and it fired up. hope i didn't blow the head gasket. 1 is down a bit from inital readings, bummer, i'm more than 10% and more than 20psi different, which is how the oem service manual specifies it...

oh, hm, this is a new to me thing, i don't think this engines been touched. still has black paint everywhere. like even on the liftin rings to pull the engine.

engine SN 41641413
drive SN 4191106

 

[f_inscreenname]

Re: got chocolate milk? i seem to

Sounds like the manifolds to me. Take them off and hook them up to a hose and see if water runs out of the exhaust runners.
Careful or you could end up like this.

 

[ziggy]

Re: got chocolate milk? i seem to

this is a look into the t-stat housing.

this is the front of the manifold where it comes from the t-stat housing.

these don't look like real inspireing pictures to me...

 

[f_inscreenname]

Re: got chocolate milk? i seem to

They are toast. If not they will be soon.

 

[bruceb58]

Re: got chocolate milk? i seem to

That doesn't look too bad considering its a 30 year old boat.

I would be way more interested in seeing what your risers look like though!

 

[ziggy]

Re: got chocolate milk? i seem to

well, i'm a little disappointed in what i found. here's the manifold

here's the riser

i figured i'd see rust thru. i don't. i hope it's is my cause but at this point i guess i'm not ruleing out other options. should i go give it a go and see what happens? like take it for a ride or should i be taking more apart. like the head. i don't want to do that really. as i may have hind sight then. i put it back together and assumed i'd be hosed on the riser manifold.

oh, i did find i was missin my flappers though. got em now. guessin i can infer from that, that it's overheated at least once.....


maybe i had a wave wash in from the back. but i don't think so. usally slow down slowly.......

 

[bruceb58]

Re: got chocolate milk? i seem to

That little bit of rust that you see at the very bottom of the inside of the exhaust manifolds indicates that you may have had a leak in your manifold riser gasket. I would clean off the old gasket, check for flatness and button them back up. The cooling walls at the joint look pretty good.

Change your oil a couple times to get back to clear oil and see if the chocolate milk comes back.

 

[ziggy]

Re: got chocolate milk? i seem to

heres some more pics. i wish i could think that it was a manifold gasket. but i don't see any signs of leaks. i don't know. but suspect this gasket is auto in origin. it don't look like my mercruiser gaskets. no paint and is much stiffer.
the crack is at the bottom of the manifold. this is the close up.

now have an aftermaket manifold and riser ontoit. along with a mercruiser gasket.....

 

[bruceb58]

Re: got chocolate milk? i seem to

There is no water passage at the manifold gasket so I wouldn't expect anything there anyway.

If there is a crack on the outside, there could be a crack on the inside.

Might be worthwhile pressure testing the old one just to see if there are any internal leaks.

 

[f_inscreenname]

Re: got chocolate milk? i seem to

How old is it????

Just replace it. Why take a chance?

 

[ziggy]

Re: got chocolate milk? i seem to

thanks f_inscreenname. i did just replace them. had it together two nights ago. started it up yesterday and ran just fine on the hose, like it did. used the almost new (5-10hrs) manifold and riser off my 72 il6...mighty sportin to have some spare parts on hand and would have gone to waste had i not got another il6. anyways. i also was a little bummed that i didn't see the riser gone as stated above. was concerend that perhaps i was on the wrong track. check this out.

thought i'd go fer yer idea off fillin up the old manifold with some water and see what happened. that's what happened. i fell muucch better seein a defect. at least i know it wasn't a waste of time. i suppose i could still have headgasket or other issues. but this looks like it was one of the issues......thanks again man.......
now i just need it to quit monsoonin in ne. so i can get out and do me a little wot to get the last moister out of it from the chocolat milk and run me one more oil and filter change......
i hope.

 

[f_inscreenname]

Re: got chocolate milk? i seem to

If you really want to clean it out in a single oil change.
Change the oil and replace a qt of oil with "engine clean out" (find it at the local parts store or you could use a qt of diesel fuel, its the same thing). Run the motor for a few min's only at idle speed and then change the oil again. It will be as clean as can be inside and it will not hurt the motor.

 

[ziggy]

Re: got chocolate milk? i seem to

i guess i'm not as concerened about a clean as a whistle engine inside right now as i am with being sure the water is out of it. does the engine clean out or diesel remove moisture? right now i have two in driveway runs on the hose. both up to operatin temp. after an oil and filter change. one run was on the old manifold and riser. i suppose reintroduceing water back into it. and one on the new manifold and riser. the oil don't look contaminated right now.

 

[f_inscreenname]

Re: got chocolate milk? i seem to

If its clean now I guess you will be OK but i would still do the clean out and yes it will get the moisture and the oil/sludge that is stuck to the inside of the motor.