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GerhardH · 07-05-2020, 05:50 AM

And preparation for the new valves:
looking for stock similiar but stainless steel.

At the moment I believe that the contact area (Seat width) shut be:

.060 to .080 inch for the exhaust and .040 inch for the inlet. (Exhaust must transpoprt more head)
.060 to .080 inch = 1.524-2.032 mm = 1.5-2 mm
.040 inch = 1.016 mm = 1 mm

Apply the paste to 3-4 points on the underside of the valve.
Rotate the valve in the seating with the valve grinding tool, lifting occasionally.
You can tread the paste with a litte bit oil.
Good cleaning after is mandatory.

07-05-2020, 05:50 AM	#87
GerhardH Registered User Join Date: Aug 2017 Location: South Germany Posts: 527	Re: My 1968 C-20 Golden Anniversary Project And preparation for the new valves: looking for stock similiar but stainless steel. At the moment I believe that the contact area (Seat width) shut be: .060 to .080 inch for the exhaust and .040 inch for the inlet. (Exhaust must transpoprt more head) .060 to .080 inch = 1.524-2.032 mm = 1.5-2 mm .040 inch = 1.016 mm = 1 mm Apply the paste to 3-4 points on the underside of the valve. Rotate the valve in the seating with the valve grinding tool, lifting occasionally. You can tread the paste with a litte bit oil. Good cleaning after is mandatory. Attached Images __________________ Best regards GerhardH! Members met: 68 short step, 68bowtie, 72c20customcamper, botmfedr1, C/10 King, Chevyland, cornerstore, dmjlambert, fun in dirt, GMan69, Ol Blue K20 1968 CHEVROLET C20 Custom Camper 50th Anniversary, Long bed (LB) 8', 327 V8, Air Condition (AC), Power Steering (PS), Power Brake (PB), Z62 Custom & Comfort Appearance, Turbo Hydramatic TH 400 http://67-72chevytrucks.com/vboard/s...d.php?t=760400 Last edited by GerhardH; 07-05-2020 at 06:45 AM.