Need To Find Out What Size Valve Stem Seals

Grumpy

The Grumpy Grease Monkey mechanical engineer.
Staff member
i have a set of dart pro 1 215 aluminum heads and i need to find out what size valve stem seals i need. https://www.summitracing.com/parts/drt-11521122p these are the heads and here is one of the 2 sizes that i think may fit. https://www.summitracing.com/parts/drt-26000021 and https://www.summitracing.com/parts/drt-26000022. never changed them before but it looks easy to do, just need to know the right size. any help is appreciated.



I just don,t see that as a huge issue,
don,t you have access to an accurate dial caliper
to accurately measure the valve stem?
12cal.jpg

fel-ss72527_w.jpg


heads still on engine

http://store.summitracing.com/partdetai ... toview=sku

pro-66832_cp.jpg


heads off the car

http://store.summitracing.com/partdetai ... toview=sku

https://www.jegs.com/i/Moroso/710/62371/10002/-1
heads still on engine
mor-62370.jpg


sun-cp7827_w.jpg

If the valve springs are to be removed with the heads still on the car,
the last thing you want is too remove a valve spring and have the valve to drop into the cylinder,
if you use air the crank tends to want to spin the crank to BDC, youll want to verify TDC ,
and make sure the flywheels temporarily prevented from turning from that the TDC position,
Ive used both methods both work,you can put 6 ft of rope in the cylinder while its in BDC then turn it to TDC, Ive used both with zero issues,
If you use the compressor youll want to keep it at 120 psi and constantly feeding pressurized air to keep the valves held in place,
and theres a small chance the compressor pushes enough moisture to allow water to accumulate in the cylinders,
so be sure you spin the engine with the starter with the spark plugs removed several times before you re-install plugs.
if you use the rope, theres a very low chance that the rope will tangle and form a knot that makes removal difficult,
in either case be sure the pistons locked at tdc,
before removing the valve springs, on each cylinder.



https://www.eastwood.com/rockwood-v...kedid=458085203015&wickedsource=google&wv=3.1
_p_3_p31487_5.jpg

related info

http://garage.grumpysperformance.co...anging-valve-springs-on-the-car.404/#post-496

http://garage.grumpysperformance.com/index.php?threads/removing-valve-seals.4283/#post-96765

http://garage.grumpysperformance.co...mpressors-and-checking-springs.903/#post-1465

http://garage.grumpysperformance.co...eplacing-oil-seals-in-heads.14660/#post-78667

http://garage.grumpysperformance.co...gree-valve-seats-tpi-motors.14662/#post-98674

http://garage.grumpysperformance.co...ting-up-the-valve-train.181/page-2#post-96257
 
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