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General Category >> Rubber Side Down! >> Valve clearance, hot or cold engine?
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Message started by Thomas Högberg on 07/21/16 at 10:43:24

Title: Valve clearance, hot or cold engine?
Post by Thomas Högberg on 07/21/16 at 10:43:24

Hi
searched but not found, hot or cold engine when I set the valve clearance?

Title: Re: Valve clearance, hot or cold engine?
Post by verslagen1 on 07/21/16 at 10:55:09

Always done on a cold engine.

Title: Re: Valve clearance, hot or cold engine?
Post by Thomas Högberg on 07/21/16 at 11:14:52

Thanks :-)

Title: Re: Valve clearance, hot or cold engine?
Post by Armen on 07/21/16 at 11:51:17

Back in the day, some cars listed both hot and cold clearance, as the mechanic would be driving the car into the shop and onto the lift.
Craziest was my '68 Opel Kadett. Valve clearance was listed/measured on the RUNNING engine. Factory tool to cover the cam sprocket so the oil wouldn't fly all over while adjusting the valves.
Not kidding ;)

Title: Re: Valve clearance, hot or cold engine?
Post by cheapnewb24 on 07/21/16 at 16:04:52

I'd think it would be hard to check a hot engine. You'd be constantly burning yourself on pretty much everything. That doesn't include the race to get it apart while it's still hot. Any engineer who designed one that way should be beaten with a stick.

Title: Re: Valve clearance, hot or cold engine?
Post by Kris01 on 07/21/16 at 18:12:59

How many 9 fingered mechanics worked on your Opel? ;D

Valve clearance lessens on a hot engine, correct? We want 0.003-0.005" clearance, correct?

Title: Re: Valve clearance, hot or cold engine?
Post by Ruttly on 07/21/16 at 20:37:37

Yes adjust them cold
I had a ford falcon six cylinder that you had to adjust the valves hot and running , what a challenge , very accurate to loose it clattered too tight you couldn't get your feeler gauge out