Tappets good or bad

AllenD · 03-11-2018, 05:03 PM

Hey everyone new guy here......thanks for having me!
So I have a question about tappets in the housing (996-104-042-05)
On the intake tappets (99610525525) I can slightly push 4 of the down
moving about 1/8” and 2 I can’t push down at all. So basically I’m trying to figure out which are bad and which are good. As for the exhaust tappets (99610504172) none of them will push down, so are they good or bad...... I’m baffled!
Thanks so much for your time.

yelcab1 · 03-12-2018, 11:52 AM

On oil fed tappets, if you can push them down at all, then the check valve are bad.

AllenD · 03-12-2018, 04:28 PM

Yeah that’s what I figured....thanks. I wonder if you can rebuild them

yelcab1 · 03-15-2018, 06:04 AM

Quote:

Originally Posted by AllenD

Yeah that’s what I figured....thanks. I wonder if you can rebuild them

Yes, you can rebuild them, but it is a chore. What are the costs of new ones?

AllenD · 03-15-2018, 07:46 AM

Cheapest I found was 137.00 a piece........I figured out how to rebuild them it is a chore but if you take your time you can do it..

yelcab1 · 03-15-2018, 08:03 AM

Good, post some pictures and the instruction for all to follow next time. That is a $3200 saving.

BYprodriver · BYprodriver's Garage

Quote:

Originally Posted by AllenD

Yeah that’s what I figured....thanks. I wonder if you can rebuild them

Proper way to test them is submerge in clean oil at about 200 degrees. You will see them purge debris as you pump the plunger. Those that cannot be pumped are excessively clogged & should be replaced.

AllenD · 03-19-2018, 04:56 PM

I will post some pics .....the newer intake tappet has a clip holding the bottom washer on..... but the older tappets (99610525520)
are what I rebuilt......