Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
Ready to start rebuilt engine - I think
Forum Index -> Beetle - Late Model/Super - 1968-up Share: Facebook Twitter
Reply to topic
Print View
Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic  
Author Message
Tenknots
Samba Member


Joined: April 07, 2024
Posts: 30
Location: NorCal
Tenknots is offline 

PostPosted: Thu Jul 17, 2025 10:51 am    Post subject: Ready to start rebuilt engine - I think Reply with quote

I've done my best to build this engine but not having done it before I'm a little apprehensive about starting it. During assembly I used plenty of assembly lube, there is new break-in oil in the crankcase and I've static timed it as best I can. Valves are set correctly. Every thing is torqued to specs. I rebuilt the carb so I know it will need some adjustments. Almost every component of the engine is brand new. I'll get a gallon gas jug for fuel for now and I've got a new battery.

So, my question is, what should I do before starting it? I assume the engine will spin quite a few times before it catches and I would hope that would build some measure of oil pressure before (if) it fires. How long can I let it spin before starting if it won't catch? Assuming it starts, just let it idle? (It's mounted in the car, not on a stand). If it starts, how long until I drain the break-in oil and put in regular oil?

Thanks in advance for answers and advice. If it doesn't start, I'll be back!
Back to top
View user's profile Send private message Gallery Classifieds Feedback
lgherb
Samba Member


Joined: October 21, 2023
Posts: 53
Location: Annapolis, Maryland
lgherb is offline 

PostPosted: Thu Jul 17, 2025 11:08 am    Post subject: Re: Ready to start rebuilt engine - I think Reply with quote

Add oil.
_________________
The only dumb question is the one that is never asked.
Back to top
View user's profile Send private message Send e-mail Visit poster's website Gallery Classifieds Feedback
bsairhead
Samba Member


Joined: October 08, 2008
Posts: 4488
Location: viroqua wi.
bsairhead is offline 

PostPosted: Thu Jul 17, 2025 11:10 am    Post subject: Re: Ready to start rebuilt engine - I think Reply with quote

Pull the plugs, easier spin. or just disconnect the coil wire, do not ground it and verify your oil pressure light does work and does go out. If you put in a new cam and or new lifters you need to run it up to 2000 rpm for 20 minutes. If not get it timed and break in the rings. Then change oil.
Back to top
View user's profile Send private message Classifieds Feedback
Bobs67vwagen
Samba Member


Joined: March 27, 2005
Posts: 352
Location: Eastern north carolina
Bobs67vwagen is offline 

PostPosted: Thu Jul 17, 2025 11:11 am    Post subject: Re: Ready to start rebuilt engine - I think Reply with quote

I would take the plugs out and.crank the motor with the battery for about 10 seconds at a time and do this 6 or 7 times. This will build oil pressure and will also let you listen to the engine spin in for any sounds that do not sound right. I always did break in oil for 40 or 50 miles and then changed it and checked the strainer for any odd looking material. Good luck I hope all goes well. Bob
Back to top
View user's profile Send private message Gallery Classifieds Feedback
KTPhil Premium Member
Samba Member


Joined: April 06, 2006
Posts: 35900
Location: Conejo Valley, CA
KTPhil is offline 

PostPosted: Thu Jul 17, 2025 11:52 am    Post subject: Re: Ready to start rebuilt engine - I think Reply with quote

As above. Also:
Add a cam lubricant (ZDPP) to the break-in oil.
Change oil and adjust valves after cam break-in.
Recheck ignition timing.

Do this at 100 miles also.
Then at 500 miles.
Then the regular 3000 miles thereafter.
_________________
Current Fleet:
- '71 Fastback
- '69 Westfalia
Retired:
- '67 Beetle
- '65 Beetle (x2)
- '65 Bus
- '71 Squareback
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Tenknots
Samba Member


Joined: April 07, 2024
Posts: 30
Location: NorCal
Tenknots is offline 

PostPosted: Thu Jul 17, 2025 3:46 pm    Post subject: Re: Ready to start rebuilt engine - I think Reply with quote

Thanks for all the advice! I’m going to remove the plugs and spin it a few times before starting.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Cusser
Samba Member


Joined: October 02, 2006
Posts: 33086
Location: Hot Arizona
Cusser is offline 

PostPosted: Thu Jul 17, 2025 4:44 pm    Post subject: Re: Ready to start rebuilt engine - I think Reply with quote

Yes, triple-check that the oil level is correct.

With new engines, I've just pulled the coil wire and cranked the engine, and the oil pressure light will soon go out.
_________________
1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297
Back to top
View user's profile Send private message Gallery Classifieds Feedback
MTT3107
Samba Member


Joined: September 20, 2021
Posts: 398
Location: KY
MTT3107 is offline 

PostPosted: Fri Jul 18, 2025 10:26 am    Post subject: Re: Ready to start rebuilt engine - I think Reply with quote

With a new, or rebuilt engine, I like to crank it without the spark plugs, till I see oil pressure, either on a gage, or when the oil pressure light goes off.
Of course, after verifying that it actually works...

After, that, install plugs and go for it, and watch for leaks or anything else unusual.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
MTT3107
Samba Member


Joined: September 20, 2021
Posts: 398
Location: KY
MTT3107 is offline 

PostPosted: Fri Jul 18, 2025 10:26 am    Post subject: Re: Ready to start rebuilt engine - I think Reply with quote

With a new, or rebuilt engine, I like to crank it without the spark plugs, till I see oil pressure, either on a gage, or when the oil pressure light goes off.
Of course, after verifying that it actually works...

After, that, install plugs and go for it, and watch for leaks or anything else unusual.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Beetle - Late Model/Super - 1968-up All times are Mountain Standard Time/Pacific Daylight Savings Time
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2025, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB
Links to eBay or other vendor sites may be affiliate links where the site receives compensation.