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Workshop => Engine and Bottom End => Topic started by: Pj Uptmor on May 22, 2014, 02:40:47 PM

Title: sealing o ring head
Post by: Pj Uptmor on May 22, 2014, 02:40:47 PM

What is the secret to seal a o ring head?  Need help please

Title: sealing o ring head
Post by: Pumashine on May 22, 2014, 07:11:06 PM

The correct size o-rings usually works.

Title: sealing o ring head
Post by: Jerry Hall on May 22, 2014, 07:38:23 PM

Quote from: Pj Uptmor;34567

What is the secret to seal a o ring head?  Need help please

Clean the o-ring groves, lay the correct o-rings in the grooves in the cylinder and bolt on the head.  If it leaks past the o-rings you have the wrong o-rings or the O-ring groves are not cut to spec.  

DO NOT PUT ANYTHING ON THE O-RINGS OTHER THAN GREASE TO HOLD THEM IN PLACE FOR INSTALLATION!!!!

If it leaks around the head nuts, use acorn nuts with copper washers.  If it leaks past the acorn nuts and copper washers, the surface of the head where the copper washers seats, needs machined.

Title: sealing o ring head
Post by: Pj Uptmor on May 22, 2014, 11:01:11 PM

The outer oring doesn't fit . It keep come out of the grove.  So how do you know it you have the correct ones.  Who do I get them from?

Title: sealing o ring head
Post by: Pumashine on May 22, 2014, 11:17:12 PM

Some guys put a little tranny fluid on the outer oring to let it relax and fit. I have had to use a thin piece up metal to hold the oring down while slipping the head on. Some air oil stores have you bring the cylinder or head (which ever the groves are cut in) down to measure and give you the correct size.Like Jerry said you can use a little grease or o-ring lube to get it to stay in place.

Title: sealing o ring head
Post by: Pj Uptmor on May 23, 2014, 12:07:38 AM

Thank you Tony for the information.

Title: sealing o ring head
Post by: F-Red on May 23, 2014, 06:36:13 AM

You can also stretch out the o-ring a liitte. A few tugs with both hands is just enough to lay her in there, while you install some head! :shame:

Title: sealing o ring head
Post by: rsss396 on May 23, 2014, 07:45:47 AM

Fred is correct, many times you have to gently stretch a oring to correctly lay in a groove

Title: sealing o ring head
Post by: GO OVRIT on May 23, 2014, 07:48:53 AM

Quote from: Pj Uptmor;34616

The outer oring doesn't fit . It keep come out of the grove.  So how do you know it you have the correct ones.  Who do I get them from?

I usually just order them from ESR

Title: sealing o ring head
Post by: Pj Uptmor on May 24, 2014, 07:07:43 AM

Thank you for the quick help..  
Thanks gain