LT5 Gaskets & Seals - ZR-1 Net Registry Forums

A26B · 10-05-2008

LT5 Gaskets & Seals

I just added LT5 valve stem seals and a thicker than OEM plenum gasket (0.047" compared to 0.031") to my products list, so I'm taking the opportunity to repost the list.

The 375 hp engine pan gasket has been modified from the stock configuration by increasing the width of the gasket approximately 50% on the front & rear of the pan, where it's most prone to leakage. Compressed thickness is virtually identical to the OEM gasket.

My oil pump pickup tube seal (o-ring) cross section diameter has been increased compared to the OEM part to obtain the proper design compression for use with either my pan gasket or the GM gasket.

Also added:

Dipstick tube seal 90~95 MY
Oil Pump Pickup Tube Seal 93~95 MY
Head Gaskets 90~95 MY
Stainless Steel Bolt Kits 90~95 MY
Gasket & Seal "Kits" 90~95 MY (several different levels available from basic injector service to complete overhaul)
Viton Fuel System Seals 90~95 MY
Bolts...... & More Bolts

PARTS, lots of new & used OEM parts

and...... currently being manufactured for Jerrys Gaskets
Bolt, Camshaft Sprocket 90~95 MY
Seat, Valve Spring 90~95 MY

WWW.JERRYSGASKETS.COM

Thanks to all who have purchased gaskets & seals.... I appreciate your orders.

flyin ryan · 10-05-2008

Thanks for the update Jerry.

flyin ryan · 10-05-2008

Hey Jerry, your head gaskets are regular composite material aren't they? not MLSs'? going to need a set soon so just wondering

,thanks.

A26B · 10-06-2008

Hi Ryan,

You are correct, head gaskets are GM/OEM. I'm working on a different design but will only be applicable with new, custom cylinders.

flyin ryan · 10-07-2008

o.k. thanks. no problem. i'll be in touch.

FU · 10-08-2008

Good prices Jerry

RKC · 10-09-2008

Regarding the valve stem seals, I haven't really taken a close look or a close read on the subject, but can the valve stems seals work on the exhaust side of the '90 cylinder heads? Can they be replaced without removing the heads? I've assembled some SBC heads in the past. Is there a substantial difference in the placement of the seals, or do they just slip over the valve stem, replace the springs and retainers?

flyin ryan · 10-09-2008

you can add/change valve seals with the engine still in the vehicle, same as an OHV/pushrod engine, but it's a pain...same as OHV/pushrod engine

. i don't believe you can add "Factory" seals to the exhaust side of 90 heads without machining but you can maybe use another seal as long as the O.D. of the seal isn't too big & get into the I.D. of the valve spring. i use U.S. Seal stuff when things get tight, they have seal's with really thin wall/jacket designs that can help out a ton when stuff gets tight. i never build engines ever without exhaust valve seals. i'd like to add them to my 90 too

RKC · 10-10-2008

Thanks for the info. After starting the header swap, I eyed the exhaust ports and its not a pretty sight. Looks like 13 of 16 exhaust valves are having trouble controlling the oil. Just thought it might be easier to put on stem seals than remove and rebuild the heads.

flyin ryan · 10-11-2008

Quote:

Originally Posted by RKC

Thanks for the info. After starting the header swap, I eyed the exhaust ports and its not a pretty sight. Looks like 13 of 16 exhaust valves are having trouble controlling the oil. Just thought it might be easier to put on stem seals than remove and rebuild the heads.

i'm with ya...if you can get in there o.k. it'll still be worth installing positive seals now. hard to say for sure how wore the guides are? probably not really all that bad considering all the oil they've been splashing around in. how many miles on her?

10-05-2008	#1
A26B Join Date: Dec 2003 Location: Arcadia, OK Posts: 3,399	LT5 Gaskets & Seals LT5 Gaskets & Seals I just added LT5 valve stem seals and a thicker than OEM plenum gasket (0.047" compared to 0.031") to my products list, so I'm taking the opportunity to repost the list. The 375 hp engine pan gasket has been modified from the stock configuration by increasing the width of the gasket approximately 50% on the front & rear of the pan, where it's most prone to leakage. Compressed thickness is virtually identical to the OEM gasket. My oil pump pickup tube seal (o-ring) cross section diameter has been increased compared to the OEM part to obtain the proper design compression for use with either my pan gasket or the GM gasket. Also added: Dipstick tube seal 90~95 MY Oil Pump Pickup Tube Seal 93~95 MY Head Gaskets 90~95 MY Stainless Steel Bolt Kits 90~95 MY Gasket & Seal "Kits" 90~95 MY (several different levels available from basic injector service to complete overhaul) Viton Fuel System Seals 90~95 MY Bolts...... & More Bolts PARTS, lots of new & used OEM parts and...... currently being manufactured for Jerrys Gaskets Bolt, Camshaft Sprocket 90~95 MY Seat, Valve Spring 90~95 MY WWW.JERRYSGASKETS.COM Thanks to all who have purchased gaskets & seals.... I appreciate your orders. __________________ 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; 09-29-2010 at 10:35 AM. Reason: Update to website sales format*

10-05-2008	#2
flyin ryan Join Date: Aug 2006 Location: Edmonton, Alberta or Phoenix, Arizona Posts: 2,736	Re: LT5 Gaskets & Seals Thanks for the update Jerry.

10-05-2008	#3
flyin ryan Join Date: Aug 2006 Location: Edmonton, Alberta or Phoenix, Arizona Posts: 2,736	Re: LT5 Gaskets & Seals Hey Jerry, your head gaskets are regular composite material aren't they? not MLSs'? going to need a set soon so just wondering,thanks.

10-06-2008	#4
A26B Join Date: Dec 2003 Location: Arcadia, OK Posts: 3,399	Re: LT5 Gaskets & Seals Hi Ryan, You are correct, head gaskets are GM/OEM. I'm working on a different design but will only be applicable with new, custom cylinders. __________________ 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.

10-07-2008	#5
flyin ryan Join Date: Aug 2006 Location: Edmonton, Alberta or Phoenix, Arizona Posts: 2,736	Re: LT5 Gaskets & Seals o.k. thanks. no problem. i'll be in touch.

10-08-2008	#6
FU Join Date: Mar 2004 Location: Found Member Posts: 4,327	Re: LT5 Gaskets & Seals Good prices Jerry

10-09-2008	#7
RKC Join Date: Jul 2008 Location: Southern California Posts: 17	Re: LT5 Gaskets & Seals Regarding the valve stem seals, I haven't really taken a close look or a close read on the subject, but can the valve stems seals work on the exhaust side of the '90 cylinder heads? Can they be replaced without removing the heads? I've assembled some SBC heads in the past. Is there a substantial difference in the placement of the seals, or do they just slip over the valve stem, replace the springs and retainers?

10-09-2008	#8
flyin ryan Join Date: Aug 2006 Location: Edmonton, Alberta or Phoenix, Arizona Posts: 2,736	Re: LT5 Gaskets & Seals you can add/change valve seals with the engine still in the vehicle, same as an OHV/pushrod engine, but it's a pain...same as OHV/pushrod engine. i don't believe you can add "Factory" seals to the exhaust side of 90 heads without machining but you can maybe use another seal as long as the O.D. of the seal isn't too big & get into the I.D. of the valve spring. i use U.S. Seal stuff when things get tight, they have seal's with really thin wall/jacket designs that can help out a ton when stuff gets tight. i never build engines ever without exhaust valve seals. i'd like to add them to my 90 too

10-10-2008	#9
RKC Join Date: Jul 2008 Location: Southern California Posts: 17	Re: LT5 Gaskets & Seals Thanks for the info. After starting the header swap, I eyed the exhaust ports and its not a pretty sight. Looks like 13 of 16 exhaust valves are having trouble controlling the oil. Just thought it might be easier to put on stem seals than remove and rebuild the heads.