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CATEGORY LISTINGS > CATERPILLAR > 3412E 1000 hp [ REFRESH ]
Thread Title:

3412E 1000 hp


Created On Thursday June 17, 2010 18:33 Diesel Talk
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danielcaseydanielcasey
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Joined: Jun 2010

Note Thursday June 17, 2010 18:33 View thread in raw text format
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my engine had new rings pistons head rod and main bearings done about 4000 hr ago today found out I have a bad valve and small pises came off the top of 1 of my pistons. 2 things 1- what could of happen to have this happen so soon 2- can I change just 1 piston and sleve and not all of them?

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 my engine had new rings pistons head rod and main bearings done about 4000 hr ago today found out I have a bad valve and small pises came off the top of 1 of my pistons. 2 things 1- what could of happen to have this happen so soon 2- can I change just 1 piston and sleve and not all of them?
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catmech
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Note Thursday June 17, 2010 21:36 View thread in raw text format
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yes, you can replace just one hole. but while you have the head off, check your inlet area for peaces of valve that may have been pushed into the inlet area. if the peaces went the other way, you have to check the exhaust piping and the turbo for peaces of valve that may be lodged in them. what serial number is your engine? they made steel pistons for e style engines, but the spray tubes also had to be re-placed when done. how long ago were the valves adjusted? in equipment it's every year or 2000 hours which ever comes first.
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danielcaseydanielcasey
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Note Friday June 18, 2010 06:17 View thread in raw text format
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thank you for your help. My s/n is BDT00266 it was bult in the yr 2000 I didn't know about the valves I will adj them now. What is the spray valves your talking about?

-------------------------
 my engine had new rings pistons head rod and main bearings done about 4000 hr ago today found out I have a bad valve and small pises came off the top of 1 of my pistons. 2 things 1- what could of happen to have this happen so soon 2- can I change just 1 piston and sleve and not all of them?
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danielcaseydanielcasey
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Posts: 7
Joined: Jun 2010

Note Friday June 18, 2010 07:01 View thread in raw text format
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thank you for your help. My s/n is BDT00266 it was bult in the yr 2000 I didn't know about the valves I will adj them now. What is the spray valves your talking about?

-------------------------
 my engine had new rings pistons head rod and main bearings done about 4000 hr ago today found out I have a bad valve and small pises came off the top of 1 of my pistons. 2 things 1- what could of happen to have this happen so soon 2- can I change just 1 piston and sleve and not all of them?
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catmech
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Note Friday June 18, 2010 22:20 View thread in raw text format
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THE SPRAY TUBES I WAS REFERRING TO SPRAY OIL TO THE BOTTOM OF THE PISTON. LOOKING AT YOUR SERIAL NO. YOU SHOULD HAVE A TWO PEACE PISTON AND SKIRT DESIGN. THAT IS NOT THE ONE I WAS TALKING ABOUT, SO YOU SHOULD BE OK. THE CROWN (TOP) PISTON, IS STEEL, SO YOUR VALVE OR VALVE SEAT PROBABLY WAS THE PROBLEM. CHECK TO MAKE SURE YOUR BRIDGES ARE NOT HITTING THE TOP OF THE ROTATORS, OR THE VALVES ARE NOT RECESSED BELLOW THE HEAD FAR ENOUGH WHEN VALVES WERE INSTALLED, AND THEY HIT THE TOP OF THE PISTON. THAT ARE SOME POSSIBILITIES. I HAVE ALSO SEEN PEOPLE PUT THE WRONG VALVES IN THE WRONG HOLE, INLET IN EXHAUST AND EXHAUST IN INLET. SOMETHING TO LOOK AT.
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CATEGORY LISTINGS > CATERPILLAR [ REFRESH ]
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