sshewins
Jesus Freak
I've looked, but apparently not in the right places. I can seem to find anything on how to remove or install precups. Maybe I'm missing something, but I just can't find it. Thanks in advance,
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precup removal and install
- Thread starter sshewins
- Start date
DZZ71
"Living The 6.5 Dream"
Remove heads from engine then remove pre cups from heads install new precups then install heads with new gaskets and ARP head studs.
bison
Well-Known Member
You can remove them with hammer and punch trough the injector hole
Precups are easy to pop out. Woden dowell and a few wacks of a hammer through the injector hole. Clean the carbon with a wire brush and install the new precups. Check for them being level with the head - there is a spec for this above or below the head measurements.
sshewins
Jesus Freak
Oh, ok. That's easy. Here I'm thinkin its got a hidden bolt somewhere. Thanks!
3500GMC
What T F, over
Watch for fitment between different heads/precups... They gotta be exactly flush with the head to seal up properly. Some 'machine shops' mill heads with the cups in place...
sshewins
Jesus Freak
My former bro-in-law has a machine shop and he has to send diesel heads to another shop to "grind" because of the precups will tear up his milling machine. I'm just glad we still get along pretty well.