bent pushrods blew head gasket
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Elder User
Joined: Apr 2008
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From: Redmond, Or
bent pushrods blew head gasket
So does anyone have a good write up on Removing and replacing heads? Ive never done it in the truck and am not looking forward to it.. so story goes i bend two pushrods had a pretty good knock, guessing that the exhaust valve got stuck closed and blew the head gasket...
Lead Driver
Joined: Sep 2005
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From: Norco,CA
Bad luck. It shouldn't be hard but they are heavy. Some guys just pull the motor. Did it get hot. What caused the head gasket to blow. Pull the injector, and glow pug and take a look. Bore scope it, if piston is bad to pull the motor. Chet
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From: Damon (South East Texas)
It would be a good idea to upgrade those valve springs if you haven't already. Modding a diesel tends to increase the acceleration response and the rapidly rising rpms will cause valve float. I noticed a big difference on how my engine performed after a "simple" valve spring change. Heavy things weren't meant to move that fast. Valve train and truck included. 
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Elder User
Joined: Apr 2008
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From: Redmond, Or
No, it didnt get hot, but either the pushrod got jammed in the head and cracked it or the exhaust valve got jammed up and not opening and caused the head gasket to blow... the solid white smoke out of the tail pipe and all the coolant pouring out of the degas bottle tells me its a gasket or cracked head.
No I never did upgrade springs or pushrods, but I will be doing this now .
No I never did upgrade springs or pushrods, but I will be doing this now .
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Elder User
Joined: Apr 2008
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From: Redmond, Or
I've removed the heads off my last block when it was on the ground in the shop, I am not looking forward to doing this in the driveway with the engine in the truck, almost tempted to take it in to the shop and have it done... I'm just getting tired of wrenching on this thing.. was hoping someone had a step by step writeup on the r&r of the heads while in the truck
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you can't fix stupid!
Joined: Mar 2008
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if i were you i would yank the engine to do it but thats me. with all the time youll have jockeying things around doing it in the truck and engine pull and replace would be worth it......i about crapped my pants when i lifted the first head off my motor and it was on a stand....didnt anticipate it being that heavy.....either way you choose good luck...
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From: Gary,Indiana
I agree with pulling the engine out to do it. And Bill I hope you are being honest with us about ALMOST pooping your pants???LOL If you did would you tell us?? I am sure I would be pooping myself if I were to try to R&I the head in the truck. And that wouldn't be pretty !!
you can't fix stupid!
Joined: Mar 2008
Posts: 1,906
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I agree with pulling the engine out to do it. And Bill I hope you are being honest with us about ALMOST pooping your pants???LOL If you did would you tell us?? I am sure I would be pooping myself if I were to try to R&I the head in the truck. And that wouldn't be pretty !!
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From: Norco,CA
around and around. Good post!
Chet
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From: Gilbert Az.
Brian, if you've got a hoist and a flat spot you will be so much better just pulling the engine to pop the heads! Trust me on this! I stayed at a Holliday Inn Express last night!...
Seriously I've done it in frame and the akward positioning & extremely heavy heads makes it almost impossible to get a gentle approach onto the head gasket! &that can make for a no bueno seal and early failure if the sealing rings are smacked instead of crushed into place! I also found it's faster (for me at least) to do them out of chassis! It's not like it takes a lot to pull a 7.3, 4 hours tops 1 man. Get a 30 pack make some phone calls, it's a Saturday project out, off, studs, gaskets, 110 springs, on, in, test drive to store for more beer...DONE!
Jim & fat optimistic Monty
ps. If your anywhere near me I'll be there bright and early
Seriously I've done it in frame and the akward positioning & extremely heavy heads makes it almost impossible to get a gentle approach onto the head gasket! &that can make for a no bueno seal and early failure if the sealing rings are smacked instead of crushed into place! I also found it's faster (for me at least) to do them out of chassis! It's not like it takes a lot to pull a 7.3, 4 hours tops 1 man. Get a 30 pack make some phone calls, it's a Saturday project out, off, studs, gaskets, 110 springs, on, in, test drive to store for more beer...DONE!
Jim & fat optimistic Monty
ps. If your anywhere near me I'll be there bright and early
