after performing a compression check .... lots of pics links to gallery ...

[CharliePalmHarbor]

after performing a compression check. The engine did overheated and you now do i have a head gasket leak ?

(which may allow water into the combustion chamber.)

its a new impeller and pump on a 86 30HP johnson..
water pumps out steady stream for first cpl minutes then goes to a broken up stream to eventualy just puffs of smoke ...

can this be my problem ... ??

and how would u repair a head gasket leak .??

thank you .....

 

[StratosRob]

Re: after performing a compression check ....

Re: after performing a compression check ....

If all compression is good ( no more than 10% difft) what do your plugs look like ? If the water is getting in the head your plugs will look new. As for repair of the head gasket ( buy a manual ) replace gasket.

 

[clint]

Performing a compression check ....

Performing a compression check ....

Replace head gasket and do a compression check after. Water is definitely entering cylinder and building up steam and extra heat. Relace plugs also if they are old. Good Luck!
Clint 8)

 

[CharliePalmHarbor]

Re: after performing a compression check ....

Re: after performing a compression check ....

gallery> http://pg.photos.yahoo.com/ph/solrac1222/detail?.dir=6ba7&.dnm=9c8bre2.jpg&.src=ph

hello after doing a compression check the top cycynder was at 90 and the bottom at 60psi ....

i took the head gasket off u can see in the gallery .. does this look like a bad gasket ???

see more atthe gallery link above ,,,

cylinder walls feel smooth ....

have build up on the pistons but it is an 1986 model ...

 

[tashasdaddy]

Re: after performing a compression check ....

Re: after performing a compression check ....

charlie, don't like what i see in headgasket 005, 006.,009, 011. what is the silver showing up a piece of ring> , 011 also may be a cracked piston. really can't tell. let's get some other opinions. edit your heading and add (pics) to it. will get more attention.

 

[Walker]

Re: after performing a compression check ....

Re: after performing a compression check ....

That silver that you see, tashasdaddy, is the edge of the intake port.

 

[CharliePalmHarbor]

Re: after performing a compression check ....

Re: after performing a compression check ....

i saw no rings the cylindrr walls are smooth .......

heres a pic of a new head gasket ...

i cant see a diffrence between the 2 ... old and new ...

the guy atthe shop said it would prob fail in the cneter .. BLOW OUT he referd to it ..

gonna put new gasket on and recheck compression ....

 

[Walker]

Re: after performing a compression check .... lots of pics links to gallery ...

Take a "good" straight edge and check the head and the cylinder deck for flatness before you install the new gasket.

 

[iwombat]

Re: after performing a compression check .... lots of pics links to gallery ...

That first headgasket picture sure looks like a blowout in the middle to me. That discoloring would indicate the gasket lifted up off the gasket surface.

 

[wilde1j]

Re: after performing a compression check .... lots of pics links to gallery ...

Make sure to use a torque wrench for re-installing the heads and follow the shop manual tightening sequence.

 

[ezeke]

Re: after performing a compression check .... lots of pics links to gallery ...

Decarb is in order. I lightened your photos and thought things looked good.

Consider thoroughly cleaning the bolt holes before returning the bolts. They tend to collect junk over the years to the point that the bolt bottoms before it should, giving you a false torque reading.

 

[mikesea]

Re: after performing a compression check .... lots of pics links to gallery ...

I don't know quite what your asking.But,if your telltale ,squirter that shows your pumping begins to blow steam,your circulation is got a problem.Your passages around the head SEEM ok.Is your thermostat OK?or the passages behind the exhust plate on the port side might be plugged up.It could also mean your impeller is sucking air, have you only run the engine on a hose,or in water,if it is sucking air,that problem often goes away if the engine is run in water

 

[CharliePalmHarbor]

Re: after performing a compression check .... lots of pics links to gallery ...

thanks all .....

installed new head gasket ...

water pumps wokrs just fine now ...

and she runs like a champ she does .....

thanks shes back in the water .......

so after she over heated ....

i had to replace the impeler the housiong all the gromets and the power head gasket and now shes working like she did when she was born ...

starts in one try ......

thanks again .... i just got a '79 100HP johnson so u might now see Q about her .....

incase u wanted to see how bad theover heating was here pics to the water pump ...

>>http://pg.photos.yahoo.com/ph/solrac1222/detail?.dir=6ba7&.dnm=e052re2.jpg&.src=ph

there are 6 pics of the pump ..

realy burnt up ......

 

[clint]

Re: after performing a compression check .... lots of pics links to gallery ...

Great Job! I am glad you found out the problem!
Clint8)

 

[Solittle]

Re: after performing a compression check .... lots of pics links to gallery ...

How did the water pump housing burn? It looks like someone took a blow tourch to it.

 

[CharliePalmHarbor]

Re: after performing a compression check .... lots of pics links to gallery ...

How did the water pump housing burn? It looks like someone took a blow tourch to it.

well impller blew out 5 nm out in to the gulf ....

had to run motor to get back to shore, u ever try to row 5nm in the gulf of mexico.... :NOT: and tow services were $200 an hour