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TA_C10 · 10-30-2019, 07:58 PM

Updates - Booster Vacuum Check Valve and Steering Shaft

Got the steering column painted and rebuilt. That new steering shaft boot was perfect fit. Little grease and it installed without issue. In the kit you had the option of using 2 studs with nuts, or 1 stud with nut and 1 press-in stud. I chose the press-in stud for the side that the bolt goes in to clamp holding it to steering gear. The reason being is if you use the stud, you have to put a nut on the end and it would get in the way of the bolt head you tighten to the steering gear. See third pic below.

The brake booster and intake vacuum connection. So my LM7 intake had a plug installed in the back of intake vacuum port. I found the part number to convert the pug to barb fitting. I also found the part number to replace the check valve in the booster to match the vacuum port size in LM7. Boom. Done. Ready for vacuum hose.

Intake Barb for LM7 truck intake = GM 12559760

Booster Check Valve = GM 15823207

Comparison between the old 3/8" valve to the new 1/2" valve.

10-30-2019, 07:58 PM	#398
TA_C10 Registered User Join Date: Jun 2018 Location: Texas Posts: 1,353	Re: TA_C10: Stage 1 Updates - Booster Vacuum Check Valve and Steering Shaft Got the steering column painted and rebuilt. That new steering shaft boot was perfect fit. Little grease and it installed without issue. In the kit you had the option of using 2 studs with nuts, or 1 stud with nut and 1 press-in stud. I chose the press-in stud for the side that the bolt goes in to clamp holding it to steering gear. The reason being is if you use the stud, you have to put a nut on the end and it would get in the way of the bolt head you tighten to the steering gear. See third pic below. The brake booster and intake vacuum connection. So my LM7 intake had a plug installed in the back of intake vacuum port. I found the part number to convert the pug to barb fitting. I also found the part number to replace the check valve in the booster to match the vacuum port size in LM7. Boom. Done. Ready for vacuum hose. Intake Barb for LM7 truck intake = GM 12559760 Booster Check Valve = GM 15823207 Comparison between the old 3/8" valve to the new 1/2" valve. __________________ TA_C10 Stage 1 build - http://67-72chevytrucks.com/vboard/s....php?p=8333444 "It's only money". Last edited by TA_C10; 10-31-2019 at 09:16 AM.