Need help with RB25 bearings and head gasket

[dreizm728]

Hi I’m in the middle of rebuilding my RB going into my s13 I spun a bearing in the 1st motor from no oil then replaced with ACL’s and spun them again so I went and bought another good known rb25det series 1 the issues I’m having is deciding on what brand and clearance to get I’ve heard mixed reviews on the ACL and on the KING bearings. My main clearance on the used stock bearings is .0015in (used plastigauge) the parts going into the motor are

NISSAN JDM COMPLETE ENGINE GASKET REBUILD KIT 10101-17U29
TIMING TENSIONER SPRING
TIMING BELT TENSIONERS 13070-5L300
IDLER PULLEY
NISSAN JDM FACTORY OIL PUMP 15010-5L800
NISSAN JDM PISTON RING SET 12033-21U10
ARP ROD BOLTS ‪202-6004‬ for a VG30
ARP MAIN STUDS CUSTOMRB26MAINSTUDKIT
ARP HEAD STUDS ‪202-4301‬
NISSAN JDM FACTORY WATER PUMP 21010-21U26
NGK COPPER SPARK PLUGS BKR7E
HKS FINE TUNE TIMING BELT 24999-AN001
THERMOSTAT 21200-42L01 - NISSAN 93 300ZX TT
I’m using the stock 25 rods and pistons I won’t be going oversized on anything
I’m also getting the rods resized with the ARP bolt installation does this mean I have to get the bearings shaved down also?

I also got an oem headgasket in the gasket rebuild kit but I wanted to put either a tomei or a cometic gasket for extra strength this is going to be my daily driver and occasional taking it to the track because part time drift car

After doing research I found this useful info

ARP rod bolts 202-6004 for the VG30 are for the RB25DET series 1 the ARP rod bolts 202-6007 are only for the Rb25det neo and RB26 because ARP doesn’t make any for the rb25 HOWEVER YOU MUST GET THE RODS RESIZED

The ARP main stud kit for the RB26 is in fact for the Rb25 you would have to trim part of these bolts for the 26

And the thermostat for the 300zx tt is also for the 25

Thanks in advance for the help and hopefully I returned the favor for others trying to find matching parts

[TheRealSy90]

If you're using oem rods and pistons, why even invest all that money into ARP hardware? The oem hardware is plenty strong enough for the power that you can safely make on oem rods and pistons. Just do a full oem rebuild. OEM Bearings sized to the factory markings on the crank and block.

[dreizm728]

If you're using oem rods and pistons, why even invest all that money into ARP hardware? The oem hardware is plenty strong enough for the power that you can safely make on oem rods and pistons. Just do a full oem rebuild. OEM Bearings sized to the factory markings on the crank and block.

I don’t know I just wanted to get hardened bolts and studs as a piece of mind type of thing the old motor Didn’t hold up too well I guess I just wanna be safe this time around the last 1 also didn’t have much but a headgasket

[TheRealSy90]

I'm just saying the last engine probably didn't fail solely due to the hardware.

[dreizm728]

I'm just saying the last engine probably didn't fail solely due to the hardware.

Hahahahaha it failed solely due to user error

[smoked240]

If you're using oem rods and pistons, why even invest all that money into ARP hardware? The oem hardware is plenty strong enough for the power that you can safely make on oem rods and pistons. Just do a full oem rebuild. OEM Bearings sized to the factory markings on the crank and block.

I agree with this for rb25. I went rb26 internals with arp studs but I can handle a little more.

[dreizm728]

I agree with this for rb25. I went rb26 internals with arp studs but I can handle a little more.

I understand fully but I bought all these parts back in 2012-2013 and I’ve had them sitting around and decided to go through with putting this thing together I’ve been debating on what I wanted to do with the car for years and I came to the conclusion earlier this year that I need to finish what I started to be satisfied with myself and I’ve also missed driving my s13i blew this car up late 2012 and early 2013 bought the new motor and 5 years later here I am