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Inside a 944 tappet....

Well ...

I was just asking Juvy this a couple nights ago in the lecture series running in Chat....

but someone over at rennlist posted this pic which is great!!!!!!.....

So where does the tappet fail ?

Any problems in soaking these in Varsol, Brake Cleaner ? to remove all the gunk.............


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Alex - PCA Polar Region - Boxster Muncher
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Old 02-04-2004, 03:31 PM
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Don't have a 944 lifter to look at but most hydraulic lifters have snap rings to facilitate disassembly.

Crud gets caught in the checlk ball cavity and keeps it from seating.
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Hugh - So Cal 83 944 Driver Person
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Old 02-04-2004, 03:46 PM
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Quote:
Originally posted by SoCal Driver
Don't have a 944 lifter to look at but most hydraulic lifters have snap rings to facilitate disassembly.

Crud gets caught in the checlk ball cavity and keeps it from seating.
Socal, So do you think a good cleaning in solvents would be a good thing or a bad thing ?

Did you look at that link I posted above.... are there any rubber seals in the tappet ???



I am just pondering the thought of throwing my lifters in varsol/brake cleaner........... In the picture posted on rennlist, I cant see what if anything could go wrong....
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Old 02-04-2004, 03:58 PM
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call me ignorant, but what does a tappet do?
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Old 02-04-2004, 04:31 PM
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I soaked mine in carb cleaner then blew them out. Prior to install i filled with oil and worked them. Apply moly engine assembly lube to the contact surfaces so as no scarring will happen on initial start up.

lifters provide the medium to which operates the valves. The bottom surface rides the cam and the upper contacts the valve. Hydraulic lifters (ours) use oit to pump up the lifter to always maintain contact, hence no adjustment necessary.
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Old 02-04-2004, 04:52 PM
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Quote:
Originally posted by ds475
call me ignorant, but what does a tappet do?
Three octaves higher than a trumppet.



Same as a lifter.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 02-04-2004, 05:17 PM
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Quote:
Originally posted by ae1969
Socal, So do you think a good cleaning in solvents would be a good thing or a bad thing ?

Did you look at that link I posted above.... are there any rubber seals in the tappet ???



I am just pondering the thought of throwing my lifters in varsol/brake cleaner........... In the picture posted on rennlist, I cant see what if anything could go wrong....
Best luck I've had with chevy hydraulic lifters is to soak then back flush them. Used shop air.

Think the rubber seal is to keep the pressure in because that whole insert is pressed in to capture the piston/check valve assembly.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 02-04-2004, 05:20 PM
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