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YelloRolla
Forums Junkie

Location:
On your mum!
Registered:
May 2002

Head Gasket	Sun, 30 May 2004 01:05

Corolla is off the road ATM as the head gasket got beaten up. While tuning the car for Dubbo we were unable to keep water in it (after a big boost spike and resulting detonation). I knew in my heart that the HG had gone, and yesterday I pulled the head and found that it was indeed blown (exhaust fumes coming out of the radiator is a bit of a clue ) . The last couple of weeks it had chewed through the water at a healthy pace (the doctors do recommend 2 litres a day). This kind of serves me right though; I had not bothered to O ring the head in the rush to make Dubbo (Rod actually openly frowned upon this BAD decision). Interesting thought though - 11.82 with blown head gasket? mmmm. Today I am O ringing. Can anyone recommend the use of a sealant to help keep the gasket alive? [Report message to a moderator]

IRA11Y
Forums Junkie

Club Member

Location:
sydney
Registered:
May 2002

Re: Head Gasket	Sun, 30 May 2004 01:46

you want something to keep the blown gasket working a bit longer or a sealant when you put the new gasket on??? if its for the new one just spray a thin film of Hylomar on each side... I dont think ive had a blown headgasket yet when using it, makes for a messy clean if you have to pull the head off again for any reason though. [Report message to a moderator]

YelloRolla
Forums Junkie

Location:
On your mum!
Registered:
May 2002

Re: Head Gasket	Sun, 30 May 2004 03:23

Thanks Mick. I am putting it back on this arvo. Where does one buy Hylomar? [Report message to a moderator]

Mr DOHC
Forums Junkie

Location:
Brisbane
Registered:
October 2002

Re: Head Gasket	Sun, 30 May 2004 04:57

r u using a MHG or a normal one use hylomar on a MHG and 3 bond on a normal one both can be bought from repco [Report message to a moderator]

YelloRolla
Forums Junkie

Location:
On your mum!
Registered:
May 2002

Re: Head Gasket	Sun, 30 May 2004 05:28

Thanks - normal gasket. I just went and got Hylomar from Autopoof. [Report message to a moderator]

Allan
Forums Junkie

Location:
Melbourne
Registered:
May 2002

Re: Head Gasket	Sun, 30 May 2004 05:53

spray can and not "brush on" i hope [Report message to a moderator]

IRA11Y
Forums Junkie

Club Member

Location:
sydney
Registered:
May 2002

Re: Head Gasket	Sun, 30 May 2004 08:49

yeah use spray can not brush, gives a more even coat, and i use it on normal gaskets as well as metal, works fine but as i said, its a bitch to get off again later. airtools rock EDIT: forgot to mention for normal gasket use a very light coat! [Updated on: Sun, 30 May 2004 08:52] [Report message to a moderator]

3t-RA40
Regular

Location:
Newcastle
Registered:
May 2002

Re: Head Gasket	Mon, 31 May 2004 05:02

Don't you just hate head gaskets. I think I have an issue with mine after dubbo. Copper gasket, o ringed, used 3 bond to seal it up (2 years ago) but now have some oil in the water? Don't know if gasket, sealer or head bolts (streched) . Any ideas boys. [Updated on: Mon, 31 May 2004 05:03] [Report message to a moderator]

YelloRolla
Forums Junkie

Location:
On your mum!
Registered:
May 2002

Re: Head Gasket	Mon, 31 May 2004 07:22

HG is back in, the head has been o ringed. I used a light coating of spray on Hylomar. 3T RA40 - interesting note, I reckon that head bolt stretch may well be one of the flaws with the 3T. I cranked the down fairly tight, but not all bolts felt nice when they were pulled up. [Report message to a moderator]

3t-RA40
Regular

Location:
Newcastle
Registered:
May 2002

Re: Head Gasket	Wed, 02 June 2004 02:16

Jason, what pound did you tighten head down to. When I had the motor built (the first time) they told me 75 pounds per square inch and this was with o-ringed block, standard head gasket and no reciver groove in the head for o-ring. Since then I've changed to copper gasket when we rebuilt it properly with reciver groove now in the head and the guy from ridgecrest said to use the same torqe figure for head bolts as before. Neil. [Report message to a moderator]

YelloRolla
Forums Junkie

Location:
On your mum!
Registered:
May 2002

Re: Head Gasket	Wed, 02 June 2004 05:16

Neil, I used 75ft/lbs [Report message to a moderator]

IRA11Y
Forums Junkie

Club Member

Location:
sydney
Registered:
May 2002

Re: Head Gasket	Wed, 02 June 2004 06:29

I find the same issues with some older 4AG's ive done, theres sometimes one or two that dont feel like theyre.. how can i put it.... biting in? properly, and even if you go to new arp bolts its improved but not as good. Im thinking that there is somehow minor vibration wear occuring on the threads in the block so these bolts arent getting full friction face to face?? ( does that make sense? ) when youre locking them down. If this is the case it is easy to move on to the next stage and say that the overall torque of the head is uneven ( despite what the load on the bolt reads at the micrometer ) and therefore is possibly prone to blow. thoughts?? maybe im full of hot air with my theorys LOL failing that im standing in bullshit [Updated on: Wed, 02 June 2004 06:33] [Report message to a moderator]

3t-RA40
Regular

Location:
Newcastle
Registered:
May 2002

Re: Head Gasket

Wed, 02 June 2004 22:50

YelloRolla wrote on Wed, 02 June 2004 15:16

Neil,

I used 75ft/lbs

Yeh, that's what I meant, not 75 pounds per square inch No No No

, sorry just being blonde Very Happy

.

So, if I replace the head bolts should I take the head off completely and reseal head gasket or just redo the bolts? Can I reuse the same copper head gasket again?

[Report message to a moderator]

YelloRolla
Forums Junkie

Location:
On your mum!
Registered:
May 2002

Re: Head Gasket	Thu, 03 June 2004 00:36

I'd be very tempted to replace one bolt at a time if i was ONLY changing the bolts. [Report message to a moderator]

3t-RA40
Regular

Location:
Newcastle
Registered:
May 2002

Re: Head Gasket	Thu, 03 June 2004 03:29

The only problem I can think of is if its opened up enough to let oil past a seal dose that mean that there is a possibility that oil will get past the seal again even with new head bolts? Can I just reuse the existing copper gasket by resealing? [Report message to a moderator]

YelloRolla
Forums Junkie

Location:
On your mum!
Registered:
May 2002

Re: Head Gasket	Thu, 03 June 2004 03:52

If you are going to open it up, then you will need to anneal the gasket prior to re-seating the gasket. You are best to do it properly & remove the head and gasket, anneal the gasket, clean and re-seal. [Report message to a moderator]

3t-RA40
Regular

Location:
Newcastle
Registered:
May 2002

Re: Head Gasket	Thu, 03 June 2004 04:35

Just got off the phone to ridgecrest and they said the same thing regarding annealing gasket. And I think for the time involved I will crack the head off and do it properly. [Report message to a moderator]

1gt48u
Regular

Location:
newcastle
Registered:
April 2004

Re: Head Gasket	Thu, 03 June 2004 04:53

painful neil time to burn it?? [Report message to a moderator]

3t-RA40
Regular

Location:
Newcastle
Registered:
May 2002

Re: Head Gasket	Thu, 03 June 2004 22:02

Come on, it's only 10 head bolts, and redoing the gasket . As far as burning I leave that to you . [Report message to a moderator]

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