Bad heads
 

Well I know I should have started last fall with this project, but started to take this apart I wanted to see what may have happened to the head and this is what I found a large hole in on top of number 8. Now were would this metal go just in the intake area or thru the whole engine. Believe it or not boat ran fine but I noticed I was burning some oil and I had dark exhaust on that side of the transom.
So do I just buy a new head and get it back together and run it ?[ATTACH=CONFIG]539805[/ATTACH]

Thanks

Mark

Now show us what the cylinder and piston look like without the head on.
Any luck in acquiring the 049 or 781 's yet? Looks like the time has come.
sorry for the luck. gary

http://houston.craigslist.org/pts/4918754749.html
these match your intake manifold.

I believe the hole/holes your talking about and the only 1's I see,are cast into the head for oil drain back.I see nothing wrong in the pic you posted.when I do cylinder heads I usually grind those nice and smooth to the main casting of the head.

Mark I am on my iPhone so it's difficult to see however I can't see anything other than normal head casting. Can u take a pic with a flash. Are you referring to the upper left or to the right side of the intake runner.
Will be home I a bit and look at with iPad otherwise.

I must have been typing when u posted. But ya we were on the same page.

I should have taken a pic of the hole over number 2 looks like a 3/8 inch hole for oil to drain back, but the hole over 8 looks to have blown inward does not look like a machined hole trust me I am no mechanic just want to get back on the water after a crappy winter

Look to the right of the intake runner - It looks to me like a flaw in the casting. might be able to fix that with some JB weld ???

thats the water port and that hole you see is put there from the foundry.foundry uses chisels to knock out those openings so they're a little rough looking.

Looks just like this 427 head.

http://i21.photobucket.com/albums/b2...enname/2_3.jpg

Tink thanks for the suggestion:rolleyes:

F I wish my looked that clean.

I know I should have gotten better pics, but I went inside for a couple of vodkas instead:drink:

Do a leak down or compression test, just so you know where you are at. Like the others said that is a normal looking casting. The hole in the upper left drains oil from the head into the lifter valley. gd luck

Better get a couple more bottles of vodka for the disassembly. Lol. Did u ever do a comp test or leak down. Also curios if u had experienced any performance loss after smoking and burning oil? Also how many hours since last rebuild? Ck your valve stem seals also.

Yes in the fall I did a compression test everything came back with 120- 130 compression, the boat ran fine right up to max rpm. If the weather stays good I can get the intake off I guess that tell me more. The engine was a rebuild from a manufacture in ma. I have about 350 hours on it and not hard hours.
I do appreciate all the help and suggestions that's what makes this site great.

Ayuh,.... Is there a runability issue yer chasin', or did ya just decide to pull a valve cover, 'n saw a hole ya didn't think belonged there,..??..??

He mentioned one side was smoking and also engine burning excessive oil.

I'd be looking at the rocker studs that go bolt into the intake port.sealant may have broken down and letting oil get in.but also do a leak down test to see if the rings are shot.

well his qualifications for actually seeing the problem may be in question.:)

At least he's trying and making an attempt. We'll get him through it. But ya...

then he better take good pics so we can try and help him,,,,any shrink's in the house.:D

To funny. :bananalove: if there is I might need them in September.