Topic: Oil pump

[Grunt]

This might be a total noob question,but,(I am a noob) just did a timing chain on my 86 pickup. Now I have a leak at the bottom of the oil pump. I'm thinking I must have rolled the o ring out of the milled slot in the pump body. Leak is there when truck is running, pressure from pump is my best guess. Is there a trick to sealing this up? Thanks in advance for any help. Have a new o ring on the way.(me and the NAPA people are seeing alot of each other these last few days) Later Mac

[emsvitil]

Are you sure it's not the oil seal?

[SolidAxle]

if that little o-ring slipped out at all and got pinched then thats the problem. I like to coat it in grese so that it sticks in its groove when i put it together. It may be the seal though  . If theres a groove in the crank pulley from where the seal was riding you can sand the seal down so that when you bottom it out in the pump it rides in a different spot on the crank...pulley.

[Grunt [OP]]

The back of the pulley is bone dry. The front seal seems to be good. No burrs or issues with install. I'll give grease a shot. This is turning into a PITA. Thanks for the help, first Toyota, cool little truck. Later Mac

[93tonkatoy]

The oil pump bolts are supposed to have a sealant applied to the threads when the pump is installed. Did you do this? If not, that could be the source of the leak. I believe the top bolt is the one that usually seeps oil out.

[jimbo74]

probably that wierd shaped huge o ring.... i had that leak before, pinched it after my timing chain. spent the $10 on the oem and the leak was gone

[Grunt [OP]]

Tearing into to it this morning, hope to be driving it today. Again, thanks for the help. Later Mac

[Grunt [OP]]

Well it was the o-ring. Rolled out of groove when installed. Replaced, all is well. Thanks for the push in the right direction. Later Mac

[SolidAxle]

Good to hear you got it fixed up.