Side-oiler mystery problem

[Cracker]

Ex - the best "Props" for Gessford is they enough patience to deal with you. That surpases anything they do with a motor.

Scott - Who is doing this work? What is our wife saying, now?


Edited - I'm just kidding Slick!

[Excaliber]

theres some truth in that Cracker!

[olddog]

Originally Posted by Excaliber

If Gessford uses nitrogen, something tells me that is the best way to do it. Consider this: I can't recall a SINGLE thread or post or comment related to a 'problem' with any of Gessfords work, ever. Maybe I've just missed such a comment, if it exists? I mean, surely you can't keep ALL the people happy ALL the time? Or can you...

Sean Hyland also uses Nitrogen to sleeve the aluminum modular blocks. I would have to re-read that section of the book to be sure, but I think he puts the block in an oven and the sleeves in liquid nitrogen. At room temp the sleeves are several thousands larger than the block bore. You could never press fit a sleeve that tight.

[Monster]

In reading your original description of when the bubbles appeared it got me wondering about how you went about performing your leakdown test. Did you use the same amount of air pressure at TDC and BDC? It's possible if the pressure was not the same (higher at BDC) the source of the bubbles may not be a crack but else where such as the head or gasket and just happened to take a higher pressure to show itself. Also just curious how you locked the motor at TDC?

Thanks,
Mike

[HSSS427]

Got a call this afternoon. After honing the cylinder, he saw a slight imperfection in the side of the cylinder / sleeve. Put soapy water on it and pressurized the water jackets, but still hard to tell. So he bolted the torque plate on the block, flipped it upside down, and filled the cylinder with water. He then pressurized the water jacket and found a hand full of pin holes where air bubbles were coming through - he used the term porosity cracks. Felt under heat of a hot engine the flow would certainly increase.

So, going to re-sleeve that cylinder and bolt it back together. So now I'm wondering what's the chicken and what's the egg in terms of my overall problem. Did the head leak and cause the cylinder sleeve to leak, or other way around, or one not related to the other?

However, as Rhett said, "Frankly I don't give a damn"

[Jac Mac]

Dont think there is any relationship between head & sleeve damage in this case. Sleeve may have simply been a ' dud' or subject to what I call cavitation erosion on the water jacket side if exposed to raw coolant flow in the block. Guess you will find out for sure once sleeve is removed unless they total it in the process.

Jac Mac.

[Excaliber]

I agree with Jac Mac.

[jimmymac]

When you were driving? Did the motor over heat ? Use water Or any steam come out the tail pipe. Compressions far outweigh the pressure of the cooling system. So while driving you should have seen or had some signs. Over flow from the radiator? Compression entering the cooling system . Just a thought. Good Luck Jimmymac

[jimmymac]

When you were driving? Did the motor over heat ? Use water Or any steam come out the tail pipe. Compressions far outweigh the pressure of the cooling system. So while driving you should have seen or had some signs. Over flow from the radiator? Compression entering the cooling system . Just a thought. Good Luck Jimmymac

[HSSS427]

I think you called it cavitation.....you can see where coolant rusted the sleeve from the back until it got thin enough to allow pin holes. Holes appear larger here as the sleeve was bored out to remove it, thus opening up the holes


BTW - also found out I had a cracked rocker arm shaft in the process as well, which was close to causing big trouble.