Tomei gasket

[SKYMAGGOT]

After cleaning up a rusty cooling system in a 33 gtst that's been sitting for years it seems to have cleaned out the head gasket too haha.

It seems the Tomei metal gasket works without machining surfaces? Or put oem?

Also should put an oil restrictor while the head is off?

Thanks

[Dose Pipe Sutututu]

Tomei or Nitto, don't use the OEM one or Cosmetic ☺️

[Duncan]

And yes, put in the restrictor while you are there; a standard engine is fine with a little less oil and you are less likely to run out of oil if you have sustained high revs for any reason eg visit a track one day.

How did you clean the cooling system

[SKYMAGGOT]

3 hours ago, Duncan said:

And yes, put in the restrictor while you are there; a standard engine is fine with a little less oil and you are less likely to run out of oil if you have sustained high revs for any reason eg visit a track one day.

How did you clean the cooling system

Do you know what size restrictor?

Just flushed it with the Prestone flush & then water numerous times until the water ran clear, still looks rusted & will no doubt cause trouble later.

[MBS206]

And since the flush you have a blown head gasket?
Have you lifted the head off yet?

[WMDC35]

Are you sure the gasket is blown? What are the issues?

3 hours ago, SKYMAGGOT said:

 

Just flushed it with the Prestone flush & then water numerous times 

Thermocure is the only flush I've seen do anything with rust, very impressed with that, Prestone, rust will be by the pool having a cigarette.

 

[Duncan]

Tomei make a 1.5mm restrictor, I'd just use that.

[TurboTapin]

Be certain not to purchase your Tomei head gasket from an North American distributer. Tomei USA and Tomei JPN are not comparable. I have cheap PRP 1.5mm restrictors if you need, they're collecting dust. 

[Dose Pipe Sutututu]

Tomei US:

 

[GTSBoy]

6 minutes ago, Dose Pipe Sutututu said:

Tomei US:

 

Hey! That's not cardboard.

[joshuaho96]

On 13/07/2025 at 8:20 PM, Dose Pipe Sutututu said:

Tomei US:

 

I've heard the Tomei USA head gaskets are decent if you want to o-ring the heads but otherwise not recommended.

[Predator1]

On 23/07/2025 at 9:00 AM, joshuaho96 said:

if you want to o-ring the heads 

Didnt realise RB's had more then 1 head.