How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask CERTIFIED Your Own Question
CERTIFIED
CERTIFIED, Auto Service Technician
Category: Chevy
Satisfied Customers: 82
Experience:  A.S.E certified as Master auto Technician and Advanced Engine Performance Over 25 years experience
6246978
Type Your Chevy Question Here...
CERTIFIED is online now
A new question is answered every 9 seconds

1991 chevy s10 blazer 4x4: plug gap and type..firing order

Customer Question

i need the plug gap and type for a 1991 chevy s10 blazer 4x4 also the distibutor firing order and vacuum hose routing
Submitted: 9 years ago.
Category: Chevy
Expert:  CERTIFIED replied 9 years ago.


HelloCustomer

Here is a TSB on the plug gap

Number: 91-515-6D

Section: 6D

Date: SEPT. 1992

Corporate Bulletin No.: 266401R

ASE No: A1, A8

Subject:
SPARK PLUG GAP REVISED SPECIFICATION

 

Model and Year:
1991 S/T TRUCKS WITH 4.3L ENGINE

 

SERVICE UPDATE

The following represents revised information for SECTION 6D4 in the 1991 S/T service manuals.

This information replaces the plug gap information found under "Spark Plugs" in "Specifications."

The gap for plugs used in the 4.3L (LB4) (VIN Z) engine should be 0.035 inch, not 0.045 as stated in the manual. Torque remains as stated.

 

I would recommend using A/C delco brand spark plugs.

 

graphic

 

graphic

Related Chevy Questions