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


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

Re: LT5 Gaskets & Seals
 

Thanks for the update Jerry.:wave:

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:dontknow:,thanks.

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.

Re: LT5 Gaskets & Seals
 

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

Re: LT5 Gaskets & Seals
 

Good prices Jerry :thumbsup:

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?

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:cool:. 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:)

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.

Re: LT5 Gaskets & Seals
 

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?