[DeTomaso] Where to buy a single Keith Black KB148 piston

[Rolf Poulsen]

Hi Barry 

 

I still have the engine in the car - my mechanic is pretty sure he can change it without taking the engine out of the car. 

I have read about the large ring gap. I do not think that this is the problem. The engine have driven 14.000 miles according to previous owner. And if the ring gab was incorrect it would probably have happent earlier. 

 

from the kb website:
"Excessive spark advance, lean fuel mixture or too much compression for the fuel and cam used will make heat sufficient to butt piston rings with as much as .060" ring end gap. The entire top land can expand enough to contact the cylinder walls, when close to melt down temperatures are reached"

 

I think this was the problem as the previous owner had changed the timing just before shipping the car. And because I didnt hear any pinging I thought that it wouldn't be a problem to take the car for a spin. But I guess I was wrong :(

 

Rolf. 
 
> From: oldwheel at mts.net
> To: detomaso at realbig.com; rolf_poulsen at hotmail.com
> Subject: [DeTomaso] Where to buy a single Keith Black KB148 piston
> Date: Mon, 20 Apr 2009 14:23:26 -0500
> 
> Rolf
> I just bought a set of eight of these KB148 pistons for $207 from Summit.
> You may want to have a look at the rest of yours before you go paying a
> premium and shipping for just one piston. If the engine is out of the car,
> it looks like a set of new rings for all eight may be a good idea while it's
> easy? Make sure the top ring gaps are at least 0.026 inch in every cylinder,
> regardless of whether you use old rings or new ones. The damage in your
> photo is typical of a top ring gap that's too small. These KB pistons MUST
> have a larger gap than old style pistons. Their instructions are very clear
> about that. 0.026 inch gap is absolute MINIMUM for a 4 inch bore KB piston.
> 
> Barry
> 
> ----------------------------------------------------------------------------
> ----
> 
> 
> Rolf Poulsen rolf_poulsen at hotmail.com
> Mon Apr 20 13:45:43 CDT 2009
> 
> 
> 
> I have had a little trouble with my engine (see picture)
> http://i178.photobucket.com/albums/w241/royaldo/pantera%20stempel/IMG_1277.j
> pg
> 
> I'm from Denmark and there aren't many auto shops with part for an old
> cleveland.
> Anyone who knows if it is possible to buy one piston and not a set of 8. The
> engine is 0.40 over.
> 
> pawengineparts.com do not have any in stock and do not order less than 8.
> 
> http://www.sdparts.com do not have any in stock and will have to check if he
> can order one at a time.
> 
> 
> Any help would be much appreciated
> 
> Rolf.
> 

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