cracked head......

by **KIWIINGENUITY** » Wed Oct 21, 2009 2:36 pm

Well I have a 1992 isuzu bighorn that cracked a head, I got a new head for it from the web and while im waiting for it to come in the post I was wondering if by cracking the head if anything alse in the motor has been damaged :?:

I hope not, I also got a new gasket set , But i shouldnt neeed to replace anything alse should I ??

thanks everyone

by **geeves** » Wed Oct 21, 2009 7:10 pm

The 3.1 heads do crack for no obvious reason. Do check all the usual things for overheating and take the water pump off and check. Theres been a couple that have corroded the impeller off. Not sure if this applies to the 4jg2 as well but the famous toyota 2LT head problem is helped heaps by a big bore exhaust

by **KIWIINGENUITY** » Thu Oct 22, 2009 8:13 am

haha . best excuse ive ever herd for a 3inch striaght through with a big bore, see what the cop says when i tell him its to stop the head from cracking haha. How can i get all the stop-leak radiator stuff that i put in the radiator back out ? as i thought it was a whole in the radiator, cheers

by **Demonic** » Thu Oct 22, 2009 8:32 am

Cant save the Stop Leak additive by itself, but you can just drain the radiator into a container, save it for next time.

by **mulover** » Thu Oct 22, 2009 12:50 pm

stop leak won't hurt anything being in there unless you have a very high concentraton of it in there. Just drain the system and then flush.

by **KIWIINGENUITY** » Fri Oct 23, 2009 8:18 pm

ok thanks, i will flush it all anyway, How do I no if the water pump is stuffed when i take it of ?? cheers

by **Demonic** » Fri Oct 23, 2009 8:57 pm

if there is freeplay in it, its pretty stuffed.

by **mulover** » Tue Oct 27, 2009 12:49 pm

pretty much, basically all pumps are the same, if they make strange nosies or you can wobble the shaft, then they need attention, for the cost of a water pump and for all the work you have done so far, i would be putting a new one in, would be a great shame if you got it all back together and the water pump crapped out a few hundred k's later.

by **KIWIINGENUITY** » Tue Oct 27, 2009 2:01 pm

ok, will look into that, I cant just go replacing everything, money doesnt grow on trees were I live haha .

by **geeves** » Tue Oct 27, 2009 3:00 pm

3 things to watch on the waterpump
1 leakage
2 freeplay
3 condition of the impellor. This shouldnt happen unless the antifreeze is overlooked but there have been a few with rusted out impellors

by **KIWIINGENUITY** » Tue Oct 27, 2009 4:17 pm

pretty sure the whole truck was neglected. got it cheap. The body is in very good condition, same with interiour. But running gear..... well lets just say it doesnt have anything close to a service history since imported in 2001. dont think the oil had been changed for a good 20 000 km when I got it..... like I said it was cheap. so i dought it has ever had antifreeze in n.z .

by **mulover** » Wed Oct 28, 2009 12:58 pm

Even though you may be on a budget, i'd be stretching out and getting a water pump to be safe, would be a shame for all the money you have just spent to go down the drain.

by **daone** » Fri Oct 30, 2009 8:43 pm

Replace the water pump, timing belt, and all the idler & tensioners. This will save your time n money in the future

by **KIWIINGENUITY** » Fri Oct 30, 2009 8:46 pm

thanks, thats a good way to look at it .

by **mulover** » Mon Nov 02, 2009 10:18 am

Its the one rule i have and will always work to, if i've taken something apart to do something and there is a seal or something important like a pump that is getting on a bit, i will replace it, and usually keep the old one for a spare.

by **KIWIINGENUITY** » Mon Nov 02, 2009 4:17 pm

Ok you win haha. I will put a new timing belt on. I would be stuped not to as its not far of needing replaced anyway. Will check the water pump for play, And if its ok then it will have to stay. Iv got a full motor for spare parts but its done more km than this one, So water pump would most likely be worse i think ? ..
thanks

by **mulover** » Wed Nov 04, 2009 10:16 am

thats true, they all wear out over time, i brought a couple of old motors a while ago, and it turns out that most of the stuff i wanted was stuffed anyways and they where a bit of a waste of money!!

by **KIWIINGENUITY** » Wed Nov 04, 2009 12:05 pm

yup , Had that happen. I replaced my Ld28 nissan diesel thats in my xb falcon with one that had lower kms thinking it would be a better motor. sadly That was not the case. Im going to put new big ends in my old motor and its going straight back in haha.

by **Aperahama** » Wed Nov 04, 2009 12:25 pm

make sure you replace the head bolts as the old one's will be stretched and won't clamp the head down enough

by **KIWIINGENUITY** » Wed Nov 04, 2009 3:59 pm

you have a rota ? is it turbed ? haha

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