Lake test, Not fun...

[J JACKSON]

Re: Lake test, Not fun...

i have had a problem with the self locking nuts backing off before if you used a impact wrench to remove them it makes them get hot and lose there locking effect. i always remove them with a ratchet. because it can also mess up the stud but i usually replace the nuts anyway.

 

[trumanlake]

Re: Lake test, Not fun...

Sea Raider, sent you a PM. Maybe it will help.

 

[chiefalen]

Re: Lake test, Not fun...

Truman you pm a link that may explain this issue ? And a fix ??

What no one ELSE is supposed to gain knowledge here ??

Have been following this thread as i'm sure others have !

Ok knocking USUALLY indicates a rod, mechanics don't change maybe different ways to get the same result . To turn a shaft , in a internal combustion engine.

Questions, i read your original post, rebuilt heads, mean new parts ??

How was a mismatched set of locking nuts find it's way onto your motor??

Used ones ??

 

[MikDee]

Re: Lake test, Not fun...

This is why on the Chevy engines, I always do my valve adjustment when the engine is warmed up, & running, it's more accurate, plus there's no room for error.

 

[chiefalen]

Re: Lake test, Not fun...

MikDee old school and the right way. So whats a little oil in your hair, maybe hide the grey a little. Hah.

 

[Sea Raider I]

Re: Lake test, Not fun...

Might as well air it out!!! The PM was an opinion from a Chevy guy, he pm'd cause I guess that could be a hot button...

Anyway, his advice was basically to change the nuts out on Chevy engines due them possibly having a history of spinning off. Mainly due to previous wrenchers using the air ratchet which could potentially heat them up and cause them to go bad.

The heads were rebuilt due to 0 compression in #8 cyl, valve seat came loose. The guy I used is highly recommended in town and I am sure he went through the springs, valves and guides and made sure everything was tits..

The knocking/ticking sound was confirmed to be the rockers while on the water, had to adjust them twice before we limped back to dock. BTW - I couldnt believe how many boats sped by us while I was working on the engine not even slowing to ask if there was a problem. I would have done so...

I could go and get rocker stoppers and adjust with engine running, but for now I think she will be ok- will find out this weekend!!

Thanks to all.

 

[trumanlake]

Re: Lake test, Not fun...

Here ya go Chief,
Just thought I'd give him a little knowledge that we learned on the streets with Chevy engines. Everyone was heading into the bowels of that engine, but I try to use the old saying "KISS", just some things you just can't get away from USN.

Here's what I sent.......

Hey SeaRaider,

Just thought I'd send you message off the regular post. Anyone that has run Chevy motors on the street, knows that you have to use new lock nuts on the rockers anytime you take them off. They use to sell, (I believe the name is correct) SureLoc rocker locks. They have an allen lock that screws into the end of the nut. This was a must on big blocks for sure. You can also double nut the rocker nut which a few of us also did. Didn't want to start anything on the regular post, just wanted to pass along past experience from street rodding hi hp chevy's!

 

[chiefalen]

Re: Lake test, Not fun...

Truman good tip, and now everyone has it.

Share and share alike.

Thank you for it.

Ok run it see what happens, but what would a new set of locking nuts cost anyway??

Good luck !

 

[QSS]

Re: Lake test, Not fun...

Ok knocking USUALLY indicates a rod, mechanics don't change maybe different ways to get the same result . To turn a shaft , in a internal combustion engine.

Questions, i read your original post, rebuilt heads, mean new parts ??

How was a mismatched set of locking nuts find it's way onto your motor??

Used ones ??

cheif alen...what the!!!! he just explained that the knocking noise was the loose rocker not anything else in the engine as he explains that the noise went away after tightening..

some people have budgets and put things together from old stuff they have lying around or from friends. thats how mismatched parts gets put in.. so long as the thread is the same on the stud what would it matter.

 

[Don S]

Re: Lake test, Not fun...

some people have budgets and put things together from old stuff they have lying around or from friends. thats how mismatched parts gets put in..

If you have budgets and you can't use new parts, of have to use some old used parts, ,,,,,,,,,,,,, well, expect things to fail.
Nobody ever said that boating will fit a tight budget. If you can't afford it, expect setbacks. Those old used junk parts that friends and ebay people are selling may be cheap, but they are probably less than usable.

so long as the thread is the same on the stud what would it matter

It makes a big difference. The proper nuts are designed for the job and are self locking. NOT Nylock nuts.

 

[QSS]

Re: Lake test, Not fun...

ok fair enough you guys are just covering your backs.. from where i come from if you can,t afford it you find something to use. wreckers,second hand etc. so long as you are experienced and know what your looking for your usually wright. I assemble drag car engines all day long and have put lots together using second hand parts for people who can,t afford new and have had no drama,s to date yet. so long as you like what you do and are passionate about it you can usually make things work...

 

[Don S]

Re: Lake test, Not fun...

I assemble drag car engines all day long and have put lots together using second hand parts for people who can,t afford new and have had no drama,s to date yet. so long as you like what you do and are passionate about it you can usually make things work...

In the cases you are stateing, you are doing the work and looking at and inspecting those used parts.
We can't do that here. These are drag race cars, they are boat that people take their families out on in small ponds to the ocean and everything in between. We can tell people the PROPER way to fix something so they can be safe. Normally there are very few here that put a few bucks above their families safety, when they try, people comment on it.

I would sure hate to be the one that says "Here, use this cheap part used, other persons junk part, it may not be the right part, but it should work" only to find out they did, it didn't work and the boat got ran over, sank, blew up, or whatever and all died because they thought it was ok.

 

[chiefalen]

Re: Lake test, Not fun...

Qss i sense anger in your post. Calm down, take it easy i might get the feeling your attacking me in some way.

Lets examine what i did post, " usually " means in my book 8 out of 10 times.

One may think your wishing it to be something more then just a adjustment of the rocker or rockers.

There was bent pushrods that were replaced.

What kinda force could have done that??

Could have the pistons over traveled??

What would cause pistons to over travel ?

Hmmm let me see, could have the connecting rods break, wrist pins give?

We don't know, what we do know is the stud got got pulled out.

I hope this fixes the problem.

But me thinks there is more to come.

Good luck And keep us posted.

 

[J JACKSON]

Re: Lake test, Not fun...

on the bent push rods were they on the cylinder that dropped the valve seat? if so thats why they bent when the valves were held open by the loose seat and the piston hit the vale bending the push rod

 

[KJSmitty]

Re: Lake test, Not fun...

"what we do know is the stud got pulled out."

We do??

Actually,,, what we "have been told" is the studs are sound, yet the rocker retaining/adjustment nuts were mismatched, loose and backing off - IE coming loose.

Replacing the nuts along with a good adjustment process could very well have cured this gentleman's issues.

I wish him and his boat well.

 

[Sea Raider I]

Re: Lake test, Not fun...

Wow, guys,,,

Never thought this post would get this far. LOL

When I say bent rods, imagine them rolling on a piece of glass. I could see and hear the slight difference and barely see the bend. These were not bent badly in any way- just slightly. Enough to convince me to change them out @ $2.49 each.

Im sure the two rods on the #8 cyl were in that group. As far as the nuts go, brand new stock chevy lock nuts were .69 each. Well more than worth buying all new.

Like I posted, She ran at 2500 rpm straight for 40 minutes at perfect temp, oil pressure, amps etc with no glitches. My last worry is if she will hold togheter under load.

 

[QSS]

Re: Lake test, Not fun...

In the cases you are stateing, you are doing the work and looking at and inspecting those used parts.
We can't do that here. These are drag race cars, they are boat that people take their families out on in small ponds to the ocean and everything in between. We can tell people the PROPER way to fix something so they can be safe. Normally there are very few here that put a few bucks above their families safety, when they try, people comment on it.

I would sure hate to be the one that says "Here, use this cheap part used, other persons junk part, it may not be the right part, but it should work" only to find out they did, it didn't work and the boat got ran over, sank, blew up, or whatever and all died because they thought it was ok.

Gee Don your not insinuating that i do things the incorrect way are you ?? i hope not you don,t even know me.. The work i do is mainly Drag race engines but we still build all kinds of automotive and MARINE engines.. whats to say you can,t rebuild and have a reliable engine using some older parts. i,m sure some people will agree with me in saving a few bucks and still have a RELIABLE,SAFE AND CHEAPER engine to power there boats. there are still some nice people in this world that offer some experienced advise and aren,t out to rip you off.

 

[chiefalen]

Re: Lake test, Not fun...

Don might have to give back all the millions he's making giving advice here.

Hah !

 

[Sea Raider I]

Re: Lake test, Not fun...

Test went flawlessly, no issues at all. Kept her on plane at 3800 rpm for 25 minutes with no unusual noises.

Experimented with a trolling sock, idled around for about 3 hours, and reeled in 4 nice trout.

Not bad for a lake test.... Now on to the Ocean!!!

 

[chiefalen]

Re: Lake test, Not fun...

Trout nice taste good. Ok glad it worked out for you but stay close to shore for the first day out on the ocean, it's a unforgiving place.

Good luck !