Alright I have a blown head gasket that's for sure. From the back of the machine it was blown in the first piston. However the second push rod is bent. Had a lot of build up on it and bent. Does anyone know what that could be from? The blown gasket goes into the push rod that's bent.
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Cat 257B blow by! Please help
- Thread starter Mjeagan24
- Start date
Glad to hear you're getting to the bottom of it.
I'd guess the push rod got a little hot from the exhaust and bent. That's a pretty wild guess though.
Obviously check that valve for sticking or bending, and check that piston for any marks from foreign object.
I'd guess the push rod got a little hot from the exhaust and bent. That's a pretty wild guess though.
Obviously check that valve for sticking or bending, and check that piston for any marks from foreign object.
Nige
Senior Member
Ask them the Part Number that they are selling for that price. My system shows a 154-1248 pushrod retailing at $7.06 each. Even replacing all 8 push rods would still be only around $60.
Have you checked the condition of the ball end on the adjusting screw of the rocker where you found the bent pushrod..? You may find you need to replace that screw also. The Part Number is shown as 153-5587 priced at $.7.65.
Note: I'm doing all this without a machine Serial Number. I THINK these numbers are correct but would not guarantee them 100% without a S/N.
It seems to be a common spot for those older type gaskets to blow, at no 1 piston on exhaust push rod side. It seems odd that push rod is bent,if the exhaust valve isn't carbon' d up and sticking, i think Delmer 's guess of getting hot at the breach point is possible . Also i agree $100 is a bit rich, if you can't find used try asv or perkins they might be more reasonable? Depending how long the gaskets been blown you could have carbon particle in the oil filter or pick up, giving oil pressure problems,a good quality 15w/40 and a new oil filter might help.
Nige
Senior Member
In that case the Part Numbers above are correct. Your local dealer prices may differ by a little bit to what I quoted above, but not by $7 versus $100 ........