water in exhaust port
 

pulled header and water was in port, pressurerized the header it wont leak:mad:. so im thinking head gasket comp is low on both cyl. amigoingin the right direction.

need more details on the motor ect ....you say header? Or stock exahust? Is it just one cylinder?

Sometimes headers only leak when heated. Do a search as this topic has been discussed numerous times.

Might not be a leak. Could be gasket, head, reversion or many other issues.

Do a leak down on the cylinder in question.

I Pressured Up The Block And Can Hear Air Coming Out The Exhaust Port And Comp Is Low On That Cyl And The One Next To It.

Just the facts?
 

You might need to give us some more details here for us to help. Leaking out the exhaust valves on those two cylinders could be caused by water damage or could be contributing to the water damage, what engine,, with particulars and engine hours, what cam and specs., what exhaust type, captains call, silent choice? etc.? Real facts get Real Help!

Best Regards,
Ray @ Raylar

You clearly have an exhaust valve issue. Maybe you can pull the valve cover and get lucky and find something repairable like a broken valve spring, but odds are high the head needs to come off. Probably a bent/tuliped valve or a seat issue.

im going to pressure ck it again and do a leak down, im thinking its a headgasket:mad:

it sounds like a head gasget,can you give more info,like what engine and how many hours,feshwater or salt?:evilb:

When an exhaust valve doesn't seat because it is bent or some other reason, it will cause serious amounts of water to be inhaled through the exhaust.

I'm not sure how you guys are thinking head gasket when air is coming out the exhaust when the cylinder is pressurized?? The gasket would have to be completely gone and you would have hydlolocked. What were the symptoms before shutdown last time?

If you have a cast iron head, I have seen leaking on the exhaust port from a hole, and if the compression is down it may be from the water being in the cylinders over a period of time. Try some soap in a spray bottle while it's under pressure and look for bubbles.

the reason i say head the head gasket is we are putting 15 pounds of air pressure to the water ports not the cyl. the air is coming from the sparkplug hole. the weird thing is it ran fine the last time out, im doing a engine swap and pulled the header and noticed alot of water in the #6 hole. i was hopeing the header was leaking. but after a comp ck of both #4 and #6 cyl theres a bigger problem . the motors are 557ci,merlin heads,871s,superchillers,lightning headers never over heated, less than 50 hours on motors all the other cyl are fine

almost always,when you have low compression on 2 cylinders next to eachother,it is a head gasget,you may have also tourched the block between the 2 cylinders,and damaged the head.OUCH.:evilb:

JOHNNYBOATMAN,keep us posted on what you find ,i hope it is not to serious,but expect the worst.:party-smiley-004:

With those furthur details of pressurizing the raw side and having water come out the spark plug hole sunds just like a head gasket gone and with two down it sounds like the gasket is gone between them. Sounds like its time for a tear down, sorry to hear about your problem, but the fix could be relativly minor and you still have plenty of time for a fix before the season really gets going. Good Luck, let us know what you found.

Best Regards,
Ray @ Raylar

ok here is what i found, the comp is 140 on both engines. the hiss sound i heard was , i for got to tighten the drain plug completely never felt it coming from the cyl or plug hole just sounded that way, pressuerd block again found the crossover leaking also. so now i have it pressured and its holding still wonder where the water came from.

Exhaust valve not seating. Do a valve job.

The Cyl Were Dry We Oiled Them, Then Comp Jumped To 150# The First Time The Gage Was Messing Up Now It Has Good Comp All The Way Around. The Block Holds Air Pressure 15#s For Over 30minutes So I Think The Head Gasket Is Fine,but I Cant Figure Out Where The Water Came From. Reversion, Leaking Header?

Again, whats the specs on the cam if we are going to talk reversion and yes, pressure test the header for leaks.

Regards,
Ray @ Raylar

???
 

Again, whats the specs on the cam if we are going to talk reversion and yes, pressure test the header for leaks.

Regards,
Ray @ Raylar