Hydro locked?

[Maclin]

Re: Hydro locked?

I may have missed something along the way here, but, why are you needing to pull the drive for the compression test?

 

[1979 Quartermasters]

Re: Hydro locked?

Do I not need to spin the engine and will that not spin the impellor? It would be nice if I didn't have to take it off again, but won't spinning the engine with the starter turn the impellor enought to damage it?

Ken

 

[nola mike]

Re: Hydro locked?

Do I not need to spin the engine and will that not spin the impellor? It would be nice if I didn't have to take it off again, but won't spinning the engine with the starter turn the impellor enought to damage it?

Ken

Nah, you,re fine. Engine isn't actually running, and not spinning very fast for very long

 

[Maclin]

Re: Hydro locked?

Do I not need to spin the engine and will that not spin the impellor? It would be nice if I didn't have to take it off again, but won't spinning the engine with the starter turn the impellor enought to damage it?

Ken

I was thinking heck just put some water to it, but I forgot you have the risers and exhaust all apart, probably would not want to hook up the water then... :redface:

 

[1979 Quartermasters]

Re: Hydro locked?

I guess a couple of you guys didn't have your fingers crossed. Put it back together fired it up and it ran beautifully.

Its back together, Mac, whats your Idea? I could hook a hose to it, but I don't want to fill it with water

Ken

 

[1979 Quartermasters]

Re: Hydro locked?

I'm Back.

I had to take the exhaust off to get the compression tester in the holes.
Well here are the results, first number being dry, second wet.

#2 170/175

#4 160/165

#6 165/170

#8 165/170

Does this rule out head gasket or head or block damage? I guess what confusing me is that there is water only in #4.

Ken.

 

[nola mike]

Re: Hydro locked?

Does this rule out head gasket or head or block damage? I guess what confusing me is that there is water only in #4.

Ken.

No, it doesn't. You need to pressurize your cooling system and find out where you're leaking.

 

[Restoration man]

Re: Hydro locked?

I'm Back.

I had to take the exhaust off to get the compression tester in the holes.
Well here are the results, first number being dry, second wet.

#2 170/175

#4 160/165

#6 165/170

#8 165/170

Does this rule out head gasket or head or block damage? I guess what confusing me is that there is water only in #4.

Ken.

I would not think It would be block damage as it is only affecting once cylinder , It sill could be the head if there is a hole behind the valve you would still get good compression , just a thought can't rember if you can do this but could you swap the manifolds over left to right you would have to turn the riser round As they would be pointing the wrong way round, if you then get water in the other side you would know it was the manifold ? Just a thought !

 

[1979 Quartermasters]

Re: Hydro locked?

Well I did the preasure test and sure enough its leaking out the #4 spark plug. I put the piston to top dead centre, closing the valves and it held air. What does this mean, if anything.

I figure this means a head issue, so I started taking it apart. Got the intake off and have to go to work.

Tomorrow I will take the head off and get it tested.

Any coments or advice accepted.....

Ken

 

[NHGuy]

Re: Hydro locked?

What did you pressurize, just the engine?

 

[NHGuy]

Re: Hydro locked?

If you blocked off the lines so it isolated the motor pull off the intake manifold and check for a crack in it.

 

[shifter nut]

Re: Hydro locked?

forgot what i was gonna say....lol....

 

[1979 Quartermasters]

Re: Hydro locked?

I think I found the problem. The head gasket was pooched. I took the head in to have it checked and they said it was fine, but thought it should be refaced. The spot where the leak was, was a little low. I have all the gaskets and am going to pick up the head today. Should have it back together by Saturday. Here is a couple of pictures



Ken

 

[TilliamWe]

Re: Hydro locked?

Not the usual place for them to go. But it would cause your problems. And it must have been big enough for the water to get pushed out into the water jacket when you were trying to start it.

 

[NHGuy]

Re: Hydro locked?

Glad you got some evidence.

 

[1979 Quartermasters]

Re: Hydro locked?

Whats better to use on head bolt threads, Perfect Seal or Permatex thread sealer. I have both.

 

[1979 Quartermasters]

Re: Hydro locked?

Used perfect seal as stated in manual.

When adjusting the valves. the manual says to remove lash from prescribed valve on compression stroke. After I follow that proccedure, thats it?

Ken

 

[Fishermark]

Re: Hydro locked?

When adjusting the valves. the manual says to remove lash from prescribed valve on compression stroke. After I follow that proccedure, thats it?

What manual are you using? Typically you will then turn the adjustment an additional 1/2 to 3/4 of a turn. It can be tricky finding "zero lash" or "removing all the lash." It takes a certain amount of "feel" to keep from overtightening.

 

[1979 Quartermasters]

Re: Hydro locked?

Its the Merc Manual 17. I'll look again, but I didn't see any mention of aditional turns in non runnung. If someone could give me a definite answer in regards to this that would be great as I would like to fire it soon.


Thanks....

Ken

 

[Fishermark]

Re: Hydro locked?

Look at page 3A-28 in the manual: