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Modifying Firewall For Rear Cylinder Head Oil Return

the_tonkau

By the_tonkau,
in Fabrication

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the_tonkau Community Regular

the_tonkau

Posted
Posted

Hi All,

In my R33 Gtst I have an RB25/30 and I'm going to need to massage the firewall a little to fit the rear cylinder head oil drain fitting that I am using. Has anyone done this before that can share their experiences? Is there much behind the firewall in this position keeping in mind with the 3litre block its a 25mm or so higher than standard?. Its positioned in the rear top welsh plug spot that sits between the cams. (see sample pic)

Everyone's thoughts are welcome.

Cheers

Steve

post-1044-1254804816_thumb.jpg

Craved Grand Master

Craved

Posted
Posted

hammer

only real option without taking the dash out completely to section the area and weld in a new piece. You cant introduce too much heat either as there is the firewall insulation on the inside.

the_tonkau Community Regular

the_tonkau

Posted
  • Author
Posted
hammer

only real option without taking the dash out completely to section the area and weld in a new piece. You cant introduce too much heat either as there is the firewall insulation on the inside.

Thanks

Yeah, thats the plan as it stands, but I suppose I trying to find out how much room I can make before I damage whatever is behind it.....

Craved Grand Master

Craved

Posted
Posted

you will probably have less than an inch - just cant recall

have a look for the heater core DIY threads, should have pics of dash out as the only bits in that area is the heater/blower box

the_tonkau Community Regular

the_tonkau

Posted
  • Author
Posted
you will probably have less than an inch - just cant recall

have a look for the heater core DIY threads, should have pics of dash out as the only bits in that area is the heater/blower box

Thanks again, will look them up! I know I saved them as I need to do the heater solenoid when I can get the time. Shame your not in Melb, I have a fair bit of powder coating to be down once I finish installing the engine and redo all the ic pipes. I also need the cam covers done.

Cheers

Craved Grand Master

Craved

Posted
Posted

there is always AUSpost if you cant get what you need locally :)

Biggest thing to what for is the mounting points for the heater units, there are a couple of mounts up there, but i cant recall exactly where.

heater_unit.jpg

the_tonkau Community Regular

the_tonkau

Posted
  • Author
Posted
there is always AUSpost if you cant get what you need locally :P

Biggest thing to what for is the mounting points for the heater units, there are a couple of mounts up there, but i cant recall exactly where.

heater_unit.jpg

Ah, thats the pic. Thanks

Anyone else "massaged" their firewall?

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  • 1 month later...

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