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Old 11-14-2016, 07:54 PM
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Default Think this head is toast?

This is the cylinder head off the Caterpillar D815A
2nd picture is the piston.
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  #2  
Old 11-14-2016, 08:29 PM
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Carnage pics are always great! Thank you.
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Old 11-14-2016, 08:34 PM
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no way if it was toast it would have peanut butter and strawberry jam on it.

Are there plans to rebuild that engine? unless it is cracked or has other issues that head may be salvageable for less than a replacement head.
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Old 11-14-2016, 09:32 PM
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Plan is to replace the piston. Thought there was just a bent valve in the head. If you look close the seat for the intake valve is gone and a chunk of material removed from behind where the seat should be. Also the hamering of the head surface between the valves has me concerned.

A full rebuild was never on the table. At most replace piston, the broken exhaust and intake valve and their matching seats, guides and springs. Maybe rering the other 5 pistons.

Some more pictures. Not the best in the dark though.
The push rods for the affected cylinder are longer then the rest. Not sure why. Parts book only shows one part number for the rods. The lifters look hollowed out compared to the others too. I'll post the pictures and try to get over during daylight and get better pictures.
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Old 11-14-2016, 09:38 PM
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So what was the compression on that cylinder?
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Old 11-14-2016, 11:10 PM
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Quote:
Originally Posted by SmokinDodge View Post
So what was the compression on that cylinder?


The rest of the pictures.....
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Old 11-15-2016, 01:33 AM
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Quote:
Originally Posted by SmokinDodge View Post
So what was the compression on that cylinder?
I know it's just a stab in the dark but Imma go with none...zip...zero and nada...in that order...
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Old 11-15-2016, 01:56 AM
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It'll buff out...
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Old 11-15-2016, 09:29 AM
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A remanufactured head is $1400. Only talked to one place about a head though.

Would it be worth taking to a machine shop to have it looked over? Or not bother?
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Old 11-15-2016, 10:01 AM
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Check to see if somebody is parting out a machine. A machine with the under-carriage worn out is usually parted out because a new under-carriage would be worth more than the machine. Try ACMOC (Antique Caterpillar Machinery Owners Club) you should get some prompt answers.
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