Ask Dave

Questions for Dave Atherton.

43 item(s) found

Posted 4 months ago

Question: Dave, I own a 2002 455 hp Beaver PT, C12 and recently got an oil sample run at my...

 Ask Dave / 94 views

Posted 4 months ago

Dave worked for Caterpillar as a CAT heavy equipment diesel mechanic. Following retirement from CAT he established Dave's Diesel Diagnostics....

 Ask Dave / 76 views

Posted 4 months ago

Question: What Fuel Transfer Pump is needed to maintain constant fuel flow and pressure on Cat HEUI (Hydraulic/Electronic Unit Injector)...

 Ask Dave / 78 views

Posted 4 months ago

Question: Do all Cat Engines of a given type, e.g C-12, use the same components?   Dave's Answer: Cat builds...

 Ask Dave / 73 views

Posted 4 months ago

Question: I have a 1996 Beaver Patriot Cat 3126. It has a Winn Coleman fuel system. The glass bowl is...

 Ask Dave / 67 views

Posted 5 months ago

Question: We recently purchased a 96 Patriot 33'. As I was going thru the previous owner’s paperwork I noticed he...

 Ask Dave / 85 views

Posted 5 months ago

Question: I have a 2006 Monterey Laguna IV with a Cat C9. I’ve had a few recent events where while...

 Ask Dave / 83 views

Posted 6 months ago

Question: I'm having some overheating issues with my Cat 3126 in a 98 Monterey with 6 speed Allison tranny. We...

 Ask Dave / 91 views

C9 Engine Surge

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Posted 8 months ago

Question: Cat C9 engine, 2007 Beaver Contessa. Our engine causes our RV to shudder whenever even slight upgrades are attempted...

 Ask Dave / 119 views

Posted 8 months ago

Question: 1999 Cat C12: On rare occasions, usually upon hard acceleration the engine will blow heavy black smoke and will...

 Ask Dave / 135 views

Posted 12 months ago

Question: My assumption was the CAC cooler would be able to hold a charge of air pressure for several minutes...

 Ask Dave / 152 views

Muffler Change

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Posted 12 months ago

Question: I have a 525 hp C13. The muffler (CAT part# 261-6861) is shown as a catalytic muffler. What would...

 Ask Dave / 157 views

Engine Selection

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Posted 12 months ago

Question: We are looking to upgrade from our 1997 coach with a 3126 engine. I am considering a CAT C12...

 Ask Dave / 152 views

Posted 12 months ago

Question: We have a 2007 Contessa with a 400hp C9 (ser# 9DG08521) that has 162000 miles on it. During our...

 Ask Dave / 156 views

Posted 12 months ago

Question: I believe I saw a comment from you that one should always change the boost pressure regulator when changing...

 Ask Dave / 167 views

Posted 1 year ago

Question: I have  a 1998 Beaver with a CAT 3126B. Do you had any comments or opinions on the CAT...

 Ask Dave / 255 views

Posted 1 year ago

Question:  Dave, Short of purchasing a Cat data reader which is very expensive how does an owner/operator find out which...

 Ask Dave / 294 views

Posted 1 year ago

Do you have an oil sample analyzed at each oil change? If not, the following may change your mind. An...

 Ask Dave / 260 views

C12 ECM Upgrades

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Posted 2 years ago

Question: I have a 2000 Beaver Marquis with the CAT C12 with 58000 miles. I am wondering would I benefit...

 Ask Dave / 259 views

Posted 2 years ago

Question: Dave, in your forum post, you made mention of alternatives to the hard to get hydraulic fan. Could you...

 Ask Dave / 237 views

Posted 2 years ago

Question: Hi Dave, A week ago my engine began to be harder to start and made a white smoke. I...

 Ask Dave / 273 views

Posted 2 years ago

Question: 1988 Beaver C12 425 hp. I was having low power issues and noticed sediment and cloudy fuel in the...

 Ask Dave / 255 views

Posted 2 years ago

Dave, Should I use starting fluid when my engine doesn’t want to start?   Dave’s Answer: Recently I was contacted...

 Ask Dave / 301 views

Posted 2 years ago

Question: I have been told by a Cat mechanic to change the oil in our C 9 400 hp every...

 Ask Dave / 448 views

C12 Won’t Start

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Posted 2 years ago

Question: The starter cranks my C12 with no problem but it won’t fire. What could cause this?   Dave’s Answer:...

 Ask Dave / 803 views

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