rb mounting, what to believe? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

kapowered · 02-18-2003, 07:04 PM

I don't know who to believe, I am planning on doing a RB20 swap and was wanting to know if the engine mounting points are the same as for the KA. I've read threads saying that it will drop right in and I have read those that say it needs to have the mounting points moved. So which one is true?

whateverjames · 02-18-2003, 09:14 PM

Q: Is it true that you have to cut into the firewall or extend your front end?

A: No, there is no need for cutting into the firewall or extending the front end. If you wish to use the stock engine fan that attaches to the fan clutch assembly, you will have to re-locate your radiator or extend the front end. This is why I recommend power fans for extra cooling.

Q: Can you use the Stock RB25DET mounts?

A: Yes, the stock engine mounts are bolted to the stock crossmember which shares the same bolt pattern as the KA crossmember when bolting up to the 240SX chassis. The tranny mount can be used, but must be taken off and flipped backwards. After you do this, you should add a spacer 1.5" thick made out of anything such as wood, metal, plastic, rubber, etc... as long as it will not collapse.

http://240skyline.nissanpower.com/custom.html

I'm going to assume the RB20 would be the same.

02-18-2003, 07:04 PM	#1
kapowered Join Date: Dec 2002 Location: South Carolina Posts: 32 Trader Rating: (0) Feedback Score: 0 reviews	rb mounting, what to believe? I don't know who to believe, I am planning on doing a RB20 swap and was wanting to know if the engine mounting points are the same as for the KA. I've read threads saying that it will drop right in and I have read those that say it needs to have the mounting points moved. So which one is true?

02-18-2003, 09:14 PM	#2
whateverjames Nissanaholic! Join Date: Jul 2001 Location: St. Louis Age: 45 Posts: 2,263 Trader Rating: (0) Feedback Score: 0 reviews	Q: Is it true that you have to cut into the firewall or extend your front end? A: No, there is no need for cutting into the firewall or extending the front end. If you wish to use the stock engine fan that attaches to the fan clutch assembly, you will have to re-locate your radiator or extend the front end. This is why I recommend power fans for extra cooling. Q: Can you use the Stock RB25DET mounts? A: Yes, the stock engine mounts are bolted to the stock crossmember which shares the same bolt pattern as the KA crossmember when bolting up to the 240SX chassis. The tranny mount can be used, but must be taken off and flipped backwards. After you do this, you should add a spacer 1.5" thick made out of anything such as wood, metal, plastic, rubber, etc... as long as it will not collapse. http://240skyline.nissanpower.com/custom.html I'm going to assume the RB20 would be the same. __________________ 02 Blazer X - 90 240SX w/SR oh noes