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Old 02-19-2019   #1
aafc
 
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Default injection housing leak

After a hard drive i noticed some oil on the right side of inj housing. It looks like there is a leak from the gasket. Time to pull housing and replace the
gaskets. Should i replace the o rings on my injectors while i'am in there.
Injectors are from FIC installed some time ago. I ordered new housing
gaskets and plenum gaskets, but forgot to order o rings. Do i replace
only the primary or do all of them.
Thanks
John
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Old 02-19-2019   #2
A26B
 
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Default Re: injection housing leak

Quote:
Originally Posted by aafc View Post
After a hard drive i noticed some oil on the right side of inj housing. It looks like there is a leak from the gasket. Time to pull housing and replace the
gaskets. Should i replace the o rings on my injectors while i'am in there.
Injectors are from FIC installed some time ago. I ordered new housing
gaskets and plenum gaskets, but forgot to order o rings. Do i replace
only the primary or do all of them.
Thanks
John
John,

FIC injectors come with new, Viton o-ring seals, except for the primary injector lower o-ring seals(8), Jerrys Gaskets PN 10067600-V. If you are not sure the o-rings you have presently are Viton, I recommend replacement. The rest of the o-ring seals are OK for re-use provided they are not damaged.

Lightly lube all of the o-rings with motor oil before re-installing. Do not use silicone grease.
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JERRYS LT5 GASKETS & PARTS
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Old 02-19-2019   #3
Ccmano
 
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Default Re: injection housing leak

Quote:
Originally Posted by A26B View Post
Lightly lube all of the o-rings with motor oil before re-installing. Do not use silicone grease.
Jerry,

I’m curious why you recommend not using silicone grease?
H
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Old 02-19-2019   #4
A26B
 
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Default Re: injection housing leak

Quote:
Originally Posted by Ccmano View Post
Jerry,

I’m curious why you recommend not using silicone grease?
H
Silicone will damage the O2 Sensors.
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Jerry Downey
JERRYS LT5 GASKETS & PARTS
http://www.jerrysgaskets.com
1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc.
2016 Black-Red, 3LT-Z51 Auto 8-speed.

Last edited by A26B; 02-20-2019 at 07:08 PM. Reason: Correcting an error.
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Old 02-20-2019   #5
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
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Default Re: injection housing leak

Quote:
Originally Posted by A26B View Post
Silicone will kill the catalyst in the converters.
Actually Jerry my understanding is that silicone kills the O2 sensor, not the converter.
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Old 02-20-2019   #6
A26B
 
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Default Re: injection housing leak

Quote:
Originally Posted by XfireZ51 View Post
Actually Jerry my understanding is that silicone kills the O2 sensor, not the converter.
You are right Dom, my mistake. I knew that but it just didn't come forward when I was recalling the issue with silicone. One of those symptoms of age.. Thanks for calling it to my attention.
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Jerry Downey
JERRYS LT5 GASKETS & PARTS
http://www.jerrysgaskets.com
1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc.
2016 Black-Red, 3LT-Z51 Auto 8-speed.
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Old 02-23-2019   #7
BigIke
 
Join Date: Aug 2014
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Default Re: injection housing leak

Replaced mine, 5 years overdue, tighten our replace the evac cover bolts/gasket, it will be loose.

Get Jerry's core plugs and deep-6 the secondaries!!!

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