Powerhouse Machine Shop in Ocala, FL messed up.
07-19-2014, 12:53 PM
#1
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Powerhouse Machine Shop in Ocala, FL messed up. So I take my LQ4 block to Powerhouse Machine Shop in Ocala, FL and told them to bore it .060 over. I get it back, measure it; and the results are as follows.
Bank 1
Cyl 1. - .068 over
Cyl 3. - .072 over
Cyl 5. - .064 over
Cyl 7. - .072 over
Bank 2
Cyl 2. - .060 over (got one right, good job)
Cyl 4. - .0695 over
Cyl 6. - .059 over
Cyl 8. - .070 over
Was this my fault or should I have specified to bore ALL cylinders .060 over?
Anyways what's done is done. I just need a GOOD machine shop to fix this. I'll have to go .070 obviously if possible (never really heard of it). Any helpful and insightful thoughts would be greatly appreciated. I'm willing to take my block to Orlando, Tampa, or Gainesville if possible.
Bank 1
Cyl 1. - .068 over
Cyl 3. - .072 over
Cyl 5. - .064 over
Cyl 7. - .072 over
Bank 2
Cyl 2. - .060 over (got one right, good job)
Cyl 4. - .0695 over
Cyl 6. - .059 over
Cyl 8. - .070 over
Was this my fault or should I have specified to bore ALL cylinders .060 over?
Anyways what's done is done. I just need a GOOD machine shop to fix this. I'll have to go .070 obviously if possible (never really heard of it). Any helpful and insightful thoughts would be greatly appreciated. I'm willing to take my block to Orlando, Tampa, or Gainesville if possible.
07-19-2014, 01:19 PM
#3
I would expect most to be off a little... maybe .061 .060 .058 type of numbers but not off .012 or so. You may be able to get a matched piston set that could work. Most pistons are not exactly xx over either, which is why it's generally a good idea to have the pistons available for the machine shop to size the bores to the pistons.
You may be able to size the pistons to the bores, but it may carry a custom charge which would be about the same as just having it machined correctly.
You may be able to size the pistons to the bores, but it may carry a custom charge which would be about the same as just having it machined correctly.
07-20-2014, 08:01 AM
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I would expect most to be off a little... maybe .061 .060 .058 type of numbers but not off .012 or so. You may be able to get a matched piston set that could work. Most pistons are not exactly xx over either, which is why it's generally a good idea to have the pistons available for the machine shop to size the bores to the pistons.
You may be able to size the pistons to the bores, but it may carry a custom charge which would be about the same as just having it machined correctly.
You may be able to size the pistons to the bores, but it may carry a custom charge which would be about the same as just having it machined correctly.
I'll do some research on what you're talking about with custom pistons but that sounds too expensive for me momentarily. I just hate not using these pistons on this build.
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07-20-2014, 11:08 AM
#8
Have you talked to them about their work yet? I will bet they will be surprised that someone actually checked what they did. I have no idea what the tolerances are for boring a block but I highly doubt it's .012
IMO you shouldn't have to source another block and pay to have the work done again. I think it would be hard for them to dispute they messed up. The numbers are there.
This is different than someone assembling the engine themselves and then has problems. In that situation the machine shop has a way out saying they didn't assemble the engine and can place the blame somewhere else.
If anyone should source you a different block it's the machine shop.
Kuddo's to you for checking their work.
IMO you shouldn't have to source another block and pay to have the work done again. I think it would be hard for them to dispute they messed up. The numbers are there.
This is different than someone assembling the engine themselves and then has problems. In that situation the machine shop has a way out saying they didn't assemble the engine and can place the blame somewhere else.
If anyone should source you a different block it's the machine shop.
Kuddo's to you for checking their work.
07-20-2014, 12:40 PM
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Have you talked to them about their work yet? I will bet they will be surprised that someone actually checked what they did. I have no idea what the tolerances are for boring a block but I highly doubt it's .012
IMO you shouldn't have to source another block and pay to have the work done again. I think it would be hard for them to dispute they messed up. The numbers are there.
This is different than someone assembling the engine themselves and then has problems. In that situation the machine shop has a way out saying they didn't assemble the engine and can place the blame somewhere else.
If anyone should source you a different block it's the machine shop.
Kuddo's to you for checking their work.
IMO you shouldn't have to source another block and pay to have the work done again. I think it would be hard for them to dispute they messed up. The numbers are there.
This is different than someone assembling the engine themselves and then has problems. In that situation the machine shop has a way out saying they didn't assemble the engine and can place the blame somewhere else.
If anyone should source you a different block it's the machine shop.
Kuddo's to you for checking their work.
07-20-2014, 12:49 PM
#10
My $.02...... I'm in communications (via facebook) with them now. I gave them the numbers. They said they'll handle this professionally and they don't know how this happened. Told them the only way to professionally handle this is with another block. They said to call on Monday... we'll see what happens.
07-20-2014, 01:39 PM
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If your looking for reputable shop go to Koury Racing Engines in Deland. I've been around and know most of the shops in your area and Byron Koury is by far the best and only one I'd trust with my stuff!
07-20-2014, 03:42 PM
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I'm definitely going to watch them. I worked in a machine shop (CNC) myself for two years. While the parts are different, the measuring technique isn't. I kind of hope I am measuring wrong (I seriously doubt it though). At least I won't have to go through the headache of correcting this entire issue.
07-20-2014, 03:44 PM
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I really appreciate the tip; Thanks... I'm definitely going to check them out.
07-20-2014, 07:57 PM
#14
I'm definitely going to watch them. I worked in a machine shop (CNC) myself for two years. While the parts are different, the measuring technique isn't. I kind of hope I am measuring wrong (I seriously doubt it though). At least I won't have to go through the headache of correcting this entire issue.