![]() |
|
|
|
Registered
|
Quote:
DIN 127, DIN 128 and DIN 6905 DIN 137 and DIN 6904 DIN 6797 DIN 6798 DIN 93, DIN 432 and DIN 463 DIN 526 DIN 7967
__________________
Roland 930 Turbo '81 Too many modifications to list |
||
![]() |
|
Registered
Join Date: Jul 2013
Location: Brisbane, Australia.
Posts: 2,605
|
what washers do you use when fastening the cam towers to the heads?
__________________
Always learning. www.aircooledporsches.com.au See me bumble my way through my first EFI and TURBO conversion! https://youtu.be/bpPWLH1hhgo?si=GufVhpk_80N4K4RP |
||
![]() |
|
Registered
|
Quote:
Also, curious to the expert's opinions on disassembly/cleaning of brand new pistons and cylinders. Do I pull the pistons out and check the ring alignment? Do I remove the rings to clean them even more thoroughly? ![]() ![]()
__________________
Lillie - 1979 911 SC Targa, The Original 911 SCWDP Car. Currently in open heart surgery. |
||
![]() |
|
Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,487
|
I have yet to take apart a factory built motor that had split washers or just flat washers in cam tower or inside the cam boxes.
Don’t worry about ring alignment, the rings will align in moments where they want to run. I have always had to assemble a new set of Mahles but I’m sure they know more about P&C than we do. Bruce |
||
![]() |
|
Registered
|
That sounds like a story. This is my first (and hopefully only) new piston/cylinder set.
__________________
Lillie - 1979 911 SC Targa, The Original 911 SCWDP Car. Currently in open heart surgery. |
||
![]() |
|
Registered
Join Date: Apr 2012
Posts: 256
|
Looks to me like the CIS “hump” is oriented at the bottom of the cylinder and it is supposed to be on the left. You’ll need to separate the piston from the cylinder, so you can clean, oil, and orient everything at that time.
__________________
Ward Komers 1984 944 Track Car - Sold 1968 912 Rust Bucket - Under Repair 1971 911T - Under Repair |
||
![]() |
|
![]() |
Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,487
|
What is the weight differences from the other pistons in the set?
Casting in the piston should be 93L7 for 8.5 compression of 78/79, or what is the match number from old pistons in case they were changed? Yes, the low face of piston goes to the right to face the spark plugs Bruce |
||
![]() |
|
Registered
|
Quote:
I'm trying to determine if I need to remove all these pistons from their cylinders, clean, oil, borrow/buy the ring compression tool and re-assemble. Or is it OK to lubricate, properly orient the piston, and start putting them on?
__________________
Lillie - 1979 911 SC Targa, The Original 911 SCWDP Car. Currently in open heart surgery. |
||
![]() |
|
Registered
Join Date: Feb 2004
Location: denver
Posts: 1,147
|
Disassemble and clean. Many have found new P&C to be quite dirty.
John |
||
![]() |
|
Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,487
|
You just showed one Porsche piston, so I was inquiring
By the box, you purchased directly from dealer? Maybe that’s why they were pre assembled… Bruce |
||
![]() |
|
Registered
|
Quote:
Sounds like a plan. I'm pulling up videos of the process and will begin cleaning shortly. I'm looking to borrow the compression tools to put it all back together.
__________________
Lillie - 1979 911 SC Targa, The Original 911 SCWDP Car. Currently in open heart surgery. |
||
![]() |
|
Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,487
|
Just go to NAPA and get the metal coil that uses 1/4 inch drive to tighten
Usually less than $10 on their tool tree. The band with locking pliers may not have the correct band for 95mm and it has more bands than you’ll ever need or use..but the pliers are good for pulling the fan housing band together to get the bolt in. Bruce |
||
![]() |
|
![]() |
Registered
|
Quote:
![]()
__________________
Lillie - 1979 911 SC Targa, The Original 911 SCWDP Car. Currently in open heart surgery. |
||
![]() |
|