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What is the spark plug gap for a 79 450SL, I put in all new…

What is the spark...

What is the spark plug gap for a 79 450SL

Mechanic's Assistant: Okay, I'll connect you to the mechanic to go over that information regarding your Mercedes. Before I do, is there anything else you want him to know?

I put in all new injectors and sleeves plus rebuilt the fuel distribution block and now it won`t fire.

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Answered in 5 minutes by:
9/18/2017
Ron
Ron, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 38,620
Experience: ASE Certs.
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Hello. My name is ***** ***** I am happy to assist you today. Give me just a moment to review your post, and I'll be right back with the help you need.

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IS your the 4.5 engine?

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Okay thank yo for that, the correct gap on your 4.5 spark plugs is .032.

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Customer reply replied 10 months ago
What about the other question?

Im sorry I did not see the other question, when you say it will not fire do you mean it will crank but not start?

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Customer reply replied 10 months ago
It won`t fire.

Okay so your saying you have no spark at the spark plugs?

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Customer reply replied 10 months ago
Don`t know that. It was running before the change of parts.

Okay then that would be the next thing to check, pull a spark plug wire and hold it a 1/2 inch away from a good engine ground and crank the engine over and see if you are getting a nice blue spark out of it.

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Customer reply replied 10 months ago
the car had the battery out for about a week then replaced it with a new battery. I will check for a spark now

Okay please do, having the battery out and replacing it should not effect starting.

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Customer reply replied 10 months ago
Its getting a good spark. When the plug was out and cranking the engine over gas was squirting out.

Squirting out like the engine is over fueling?

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Customer reply replied 10 months ago
Don`t know what`s normal for fuel injection motor. Every cycle gas came out onto the exhaust shield.

You can check the pressure at the fuel distributor with gauge teed in line or at cold start injector. See the steps in the link below. That would be the place to start.

https://www.dropbox.com/s/d1nb5y51b2dyz1s/fuel%20distributor%20Sep%2018.pdf?dl=0

Ron
Ron, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 38,620
Experience: ASE Certs.
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Customer reply replied 10 months ago
I can`t test it myself now, don`t have the equipment. Thanks Walt.
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