Blown the head gasket (94 3.0 V6 4x4 auto) already had the campaign done in 98, S**T!!!.... was wondering what else should be done while I'm in there?? head bolts? timing belt? cam bore? waterpump ? all my seals redone? & what are wrist pins?? can someone explain the result of oversize pistons? what is the original size? how much bigger is safe?...i'm in a panic here guys.. gonna be big bucks any info would be great thanks

 

you dont need to go with bigger pistons, and shouldnt... the wristpin is what holds the piston head to the connecting rod

 

Ok thx, what about the other work i listed? do you think these things should be done?? while its in.. to save another visit? 200K and the timing belt was done once

 

all that needs to be done is new gaskets and checking the heads for warpage and of course headbolts. change the t-belt if due

 

The first thing you should do is shoot that POS. I just redid my heads on my 3.0 four months ago, and haven't been able to find a coolant leak since. Well, this morning, it started dumping coolant on the way to work & almost overheated. I'm about through with this f'n truck, user error or not.

:edit: PS. I think I may be starting to live up to my motto!

 

yeh shoot holes in the side of the block that will fix it

 

Toyota makes a 1KZT turbo-diesel with mechanical injection. I'm wondering if you could drop in a new engine and tranny for about the same as a good overhaul.

On the other hand, if I was to rebuild my 3.0 (and I don't think I will), I'd get a set of those larger valves from "enginebuilder" on Ebay, port, polish, put a set of headers on it and button it up. I'd only bore out my block if there was scoring or over 150K miles and then only .020 inch. Keep the same cams, cause they really are good truck cams...Torque comes on low.

Then break it in easy and keep driving her.