Author |
Message |
vavwfan1 Samba Member
Joined: May 25, 2018 Posts: 78 Location: Virginia
|
Posted: Sat Oct 20, 2018 3:57 pm Post subject: New to flat engines |
|
|
Well, I just got a 74 bus, and want to pull engine due to oil leak. PO said top-end was rebuilt, and I highly suspect rear main seal the culprit.
I'm use to 1600 DP & SP engines so I'm curious if someone can "overview" the difference between the older style and the new? (beyond the description in Bentleys)
Thanks for helping a Newbee out..... |
|
Back to top |
|
|
busdaddy Samba Member
Joined: February 12, 2004 Posts: 51149 Location: Surrey B.C. Canada, but thinking of Ukraine
|
|
Back to top |
|
|
aeromech Samba Member
Joined: January 24, 2006 Posts: 16971 Location: San Diego, California
|
Posted: Sun Oct 21, 2018 8:09 pm Post subject: Re: New to flat engines |
|
|
I’ll try.
The T4 is heavier. It’s built tougher. It’s way more expensive and complicated. You can change the push rod tube seals without pulling the heads so that’s easier. Some parts aren’t made anymore so you have to use 40 year old ones. They are either dual carb or fuel injected instead of single carb so that’s tougher. If by chance someone installed a single aftermarket carb it’s prone to drive ability issues like carb icing. There aren’t as many choices for things like exhaust, etc. _________________ Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound |
|
Back to top |
|
|
Wildthings Samba Member
Joined: March 13, 2005 Posts: 50351
|
Posted: Sun Oct 21, 2018 8:52 pm Post subject: Re: New to flat engines |
|
|
One of the main causes of leaks on these engine is the oil pressure switch which is pretty well hidden under the tin. Other likely leaks are the valve cover gaskets and the pushrod tubes. The distributor o-ring can also pump oil onto the top of the engine it isn't that easy to see. |
|
Back to top |
|
|
|