blown head gasket job

[Taiamai_Rebel]

Hi there, i have currently a blown head gasket on my 1994 GQ 4.2 petrol carby engine, and as i was ordering a new head gasket set, water pump and thermostat, the shop said i should also buy new head bolts as the old ones stretch? Is this true? Also is there anything i should be wary about while attempting this job. thanks

[YNOT]

Head bolts do stretch so it's best to replace them every time.
You should have the head crack tested and surface machined while it's off the engine, a full head reco would be even better.
Also a good idea to have the radiator reconditioned at the same time.

Have fun torqueing the head down, last time I did one the specs said to tighten the head bolts (all 20 odd of them) down in 3 stages, loosen them all off then do it all again. A bugger of a process.

Tony

[patch697]

Head bolts do stretch so it's best to replace them every time.
You should have the head crack tested and surface machined while it's off the engine, a full head reco would be even better.
Also a good idea to have the radiator reconditioned at the same time.

Have fun torqueing the head down, last time I did one the specs said to tighten the head bolts (all 20 odd of them) down in 3 stages, loosen them all off then do it all again. A bugger of a process.

Tony

Roger that old mate....................lol

[Taiamai_Rebel]

thanks for the tip ynot, i'll get the radiator done and head tested while its off, pays to do the job properly. I'm looking forward to this job, some people tell me to get rid of my patrol and update but she's done me good over the last 2 years, so i'll keep her,and get rid or update those people instead. Thats why i joined this forum!!!

[patch697]

thanks for the tip ynot, i'll get the radiator done and head tested while its off, pays to do the job properly. I'm looking forward to this job, some people tell me to get rid of my patrol and update but she's done me good over the last 2 years, so i'll keep her,and get rid or update those people instead. Thats why i joined this forum!!!

Word of advice....... Never trust a Tojo driver, they only want you to swap side cos there blinded with jealousy & hate, I mean really really hate being shown up by Patrol owners.. (They hate being recovered buy us also..... I have first hand in this....lol)

Stick with us mate, you'll be right..............hahahahahaha

[patch697]

Word of advice....... Never trust a Tojo driver, they only want you to swap side cos there blinded with jealousy & hate, I mean really really hate being shown up by Patrol owners.. (They hate being recovered buy us also..... I have first hand in this....lol)

Stick with us mate, you'll be right..............hahahahahaha

P.s. The TB42's are renown for doing there heads, so if its got a few K's up & you can swing it, I'd take Tony's advice & go a reco head. It may save you redoing the job in the near future.

[yakumo]

Generally I'd lube the new bolts aswell, just in case you didnt know

[albi]

thanks for the tip ynot, i'll get the radiator done and head tested while its off, pays to do the job properly. I'm looking forward to this job, some people tell me to get rid of my patrol and update but she's done me good over the last 2 years, so i'll keep her,and get rid or update those people instead. Thats why i joined this forum!!!

ahh thats why you get rid of it and get a landie lol
you only have to replace the head bolts if they are a torq to yeild " ie a stretch bolt" or in other words if the tension is ,say 1st step 40nm 2nd step 60 deg 3rd step a further 60 deg , then these are a stretch bolt and are single use only.

[albi]

Generally I'd lube the new bolts aswell, just in case you didnt know

yeh and that aswell ^^^^^^lol hmmmm lube
under the head of bolt and washer and on the thred .

[Ade]

Word of advice....... Never trust a Tojo driver, they only want you to swap side cos there blinded with jealousy & hate, I mean really really hate being shown up by Patrol owners.. (They hate being recovered buy us also..... I have first hand in this....lol)

Stick with us mate, you'll be right..............hahahahahaha

'tojo driver'..love that name hehehehehehe