Builds Project Killer B - 1988 BJ73

[bjowett]

Parts...

There is a potential choice for a different OEM exhaust valve here. The 1BZ-FPE, which is the lpg/cng version of this engine, utilizes a different exhaust valve. Physically notable differences of the 1BZ valve are a very slightly larger head diameter, a wider seat , a margin that is thicker by about 30%, and a large back cut on the tulip. Being that the valve is twice the price of the regular 15BF Series, I'm wagering, at this point, that it may be an even higher grade of material over the stainless 15BF Valve. CNG/LPG engines tend to have higher requirements of their exhaust valves over even turbo diesels. It's a long shot, but is anyone well ver

 

[bjowett]

ARP head studs are on the way. Has anyone sourced studs for the rods and mains?

 

[bjowett]

The 15BFT is completely disassembled. The 109mm pistons finally showed up... off for treatment and coating.

 

[OGBeno]

The 15BFT is completely disassembled. The 109mm pistons finally showed up... off for treatment and coating.

View attachment 1692954

ART’s?

 

[bjowett]

Yes.

 

[OGBeno]

Yes.

Very nice!!

 

[bjowett]

Here is the underside. Note the intake hole for the oil gallery, the drain hole is opposite lower. The hollow gallery/ring cools the upper steel (alfin type) ring land and crown.

 

[OGBeno]

-58101. 15B iteration?

 

[bjowett]

Yes, with an FT suffix.

 

[bjowett]

Hmmm, these will work nicely up front. They have properly sized 3.75 ID spring.... no dinky 3.0 springs here.

 

[bjowett]

Great video showing how a piston oil gallery works... about 1:24 into the video.

 

[bjowett]

Rear 79 Series spring swap has begun. 59.5" length.

 

[OGBeno]

Any modifications to the spring hangers?

 

[bjowett]

Yes, the front hanger will move forward roughly 5", the shackle mount rearward roughly 6".

 

[bjowett]

 

[OGBeno]

Makes sense. 79 frames are very long.

 

[bjowett]

New old stock BJ70 power steering pumps... oh yeah! I snagged three of these, so two will be up for grabs if their condition is good.

 

[bjowett]

I'll put your name on one. Also PM'ing you.

 

[bjowett]

No more PM? Lol... PM me or I'll text you.

 

[SNLC]

I haven't been following along entirely.....

Why are you swapping to the 79 series rear axle? Or is it just the springs?

Cheers