2000 s70 GLT Lifter seating by size

clifford06 · Post by **clifford06** » 23 Oct 2015, 19:47

Greetings. Is there a chart, diagrahm or schematic that shows the placement of lifters by size / thickness in the head ? My storage container was knocked over and lifters were scattered out of order. Several of them will need to be replaced due to rusting from blown head gasket.
Dealer says replacement kit is the same as my 2000 T5. Can I use the same placement of lifters by size in the GLT head as in my T5 head ? Is there valve clearance difference between the two ? This would reduce the machine shop cost by just dropping them in instead having to measure individual clearance.
Thoughts and opinions respected.

Post by **rspi** » 23 Oct 2015, 20:02

I believe the T5 and GLT share the same head.

Post by **jimmy57** » 23 Oct 2015, 20:46

They aren't fitted by any scheme. They are used as adjustment for clearance. The measured clearance decides where they go. Intakes set to .20mm +/- .03mm and exhaust is .40mm +/- .03 mm.

Make sure valves are seated and then find two tappets of the same size in your selection out of engine.
Two of the same size makes your math and measurements easier.
Install tappets in intake one holes and drop in intake cam and make yourself a cam holddown out of some strap of metal and run a top cover bolt down into head to keep cam pushed down. snug it down, no need for lots of force. use feeler gauges to determine the approximate clearance.

Example: using 16.16 tappets you measure .32mm and .13 mm on the 1st and second positions intake. You are targeting .20mm. For 1 the clearance is .12mm too big so the tappet needs to be .12 mm more than the gauge tappet to close down the too wide clearance. 16.16mm + .12mm = 16.28 mm tappet for position 1. For 2 the clearance is .07mm too small. The tappet needs to be .07mm smaller to open the clearance up. The problem here is the tappets are in .02mm increments. You can use .06mm smaller, a 16.10mm tappet to get .19mm, or use one .08mm smaller and end up with 16.08mm tappet and end up with .21mm clearance. Write down both and use either you have on hand or can get from dealer.

Do the same procedure for all the others once cylinder set at a time for intake and then use exh cam and do the same once cylinder set at a time for exhaust. For exhaust the math differs in that you use .40mm as target.

Remember that too big clearance gets bigger(taller) tappet and too small clearance gets smaller(shorter) tappet.

When you are done you will have a list of 20 tappets and you sort through the ones you have that are OK and put them in 20 Dixie cups each marked with their intake and exhaust position numbers. Any you don't have on hand are the ones you get by size from dealer or indy that has them. Don't count on any indy shop having them and the dealer will likely have to order most.
Also remember you have the plus/minus .03mm range so you may have some tappets that still meet the range that is OK. The tappet size should be visible by looking under tappet where it has the stem that touches the valve stem.

Post by **RussB** » 23 Oct 2015, 21:15

Don't the 2000 T5's have solid lifters? Would the shims be the same as for the hydraulic lifters?

Post by **jimmy57** » 23 Oct 2015, 21:29

2000 has solid lifters, no shims. Hydraulic tappets do not use shims, the hydraulic function takes up the clearance. The lifters (tappets) have stem on underside that touches valve top. The stem to top tappet face is ground to sizes in .02mm increments so the tappets are the valve clearance control.

Post by **RussB** » 23 Oct 2015, 22:00

Thanks for the info, jimmy57

clifford06 · Post by **clifford06** » 23 Oct 2015, 22:15

This Information is golden. Lifters are solid. It's a rainy weekend , so I think I'll check my T5 lifter numbers and compare them to the original lifter numbers. I remember seeing "jimmy57" s previous response to lifter clearance about rotate cam 180 degrees "away".
Correct me if wrong. This means measure clearance between valve and cam when "tip" of cam lobe is at it's it highest point, away from valve?

I

Post by **FLXC90** » 23 Oct 2015, 22:42

Correct, you are looking for static clearance with the valve fully closed, and the lifter at rest. You are establishing an area of slack that is taken up as the engine comes up to temperature. (That is why the exhaust starts with a greater clearance)

clifford06 · Post by **clifford06** » 23 Oct 2015, 23:32

Thanks. Report back with update.

clifford06 · Post by **clifford06** » 16 Dec 2015, 18:07

Greetings. If possible, could I just swap my T5 lifters and cams ? This would shorten install time. T5 lifters are in order and position secure and in better shape than 2.4 GLT lifters. Cam shafts have same ID numbering. Cam seals fit both. Thoughts and opinions respected.