# Sbc 283 **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** engines\ **Created:** [May 22, 2009, 2:33am UTC](https://community.cartalk.com/t/sbc-283/30815 "2009-05-22T02:33:21Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![67chevelle300](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/67chevelle300/32/1288_2.png) [@67chevelle300](https://community.cartalk.com/u/67chevelle300)\ **Post date:** [May 22, 2009, 2:33am UTC](https://community.cartalk.com/t/sbc-283/30815/1 "2009-05-22T02:33:21Z")
yeah i have a 65 283 thats just been rebuilt and it seems to have a lot of blow back but i havent ran it ofr 5 mins is that normal for a sbc? ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [May 22, 2009, 2:41am UTC](https://community.cartalk.com/t/sbc-283/30815/2 "2009-05-22T02:41:05Z")
Do you meen blow-by? not blow-back. When this type of mistake is made in the post it makes me wonder about the OP’s ability to diagnosis,this is only fair. Was the engine professionaly rebuilt? were any short-cuts taken in the re-build? ---
**Author:** ![67chevelle300](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/67chevelle300/32/1288_2.png) [@67chevelle300](https://community.cartalk.com/u/67chevelle300)\ **Post date:** [May 22, 2009, 2:44am UTC](https://community.cartalk.com/t/sbc-283/30815/3 "2009-05-22T02:44:49Z")
well so far i have noticed that it has blow by comming out of the valve covers and it dosent smoke at all ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [May 22, 2009, 2:47am UTC](https://community.cartalk.com/t/sbc-283/30815/4 "2009-05-22T02:47:23Z")
It’s not normal. Oil in the air cleaner housing or what? ---
**Author:** ![67chevelle300](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/67chevelle300/32/1288_2.png) [@67chevelle300](https://community.cartalk.com/u/67chevelle300)\ **Post date:** [May 22, 2009, 2:55am UTC](https://community.cartalk.com/t/sbc-283/30815/5 "2009-05-22T02:55:12Z")
well as of right now it was only comming out of the valve cover breathers but other wise it ran fine ---
**Author:** ![67chevelle300](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/67chevelle300/32/1288_2.png) [@67chevelle300](https://community.cartalk.com/u/67chevelle300)\ **Post date:** [May 22, 2009, 3:17am UTC](https://community.cartalk.com/t/sbc-283/30815/6 "2009-05-22T03:17:28Z")
i guess the best way i can make sure is to do a compression test right? or should i run it for a few minutes first? if i have too ill pull it back apart anyone have any ideas? ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [May 22, 2009, 3:52am UTC](https://community.cartalk.com/t/sbc-283/30815/7 "2009-05-22T03:52:19Z")
Does it have a PCV or a draft tube?? If PCV, is that part working correctly? Was the block bored and new pistons installed, or just new rings on the old pistons? ---
**Author:** ![67chevelle300](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/67chevelle300/32/1288_2.png) [@67chevelle300](https://community.cartalk.com/u/67chevelle300)\ **Post date:** [May 22, 2009, 3:55am UTC](https://community.cartalk.com/t/sbc-283/30815/8 "2009-05-22T03:55:22Z")
there in no pcv provision on the vlave covers but i also blew apart the little filters that go in the breathers its a std piston size with new rings and close to std bore ---
**Author:** ![pleasedodgevan2](https://avatars.discourse-cdn.com/v4/letter/p/ad7895/32.png) [@pleasedodgevan2](https://community.cartalk.com/u/pleasedodgevan2)\ **Post date:** [May 22, 2009, 4:34am UTC](https://community.cartalk.com/t/sbc-283/30815/9 "2009-05-22T04:34:47Z")
The draft tube should vent from the rear of the engine and point down near the front of the transmission. Hope the hole isn’t plugged. You do have the original intake manifold, I hope. ---
**Author:** ![67chevelle300](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/67chevelle300/32/1288_2.png) [@67chevelle300](https://community.cartalk.com/u/67chevelle300)\ **Post date:** [May 22, 2009, 4:41am UTC](https://community.cartalk.com/t/sbc-283/30815/10 "2009-05-22T04:41:27Z")
it is pluged and i believe i know whats wrong two of the sets of rings had a little or than .020 top ring gap but the others were fine they were right on the money but my machinest said since they were cast ring so they should seat fine without any problems i guess there is a chance ill have to pull it back apart and see whats going on and it dosent make sense though it runs great otherwise ---
**Author:** ![researcher](https://avatars.discourse-cdn.com/v4/letter/r/edb3f5/32.png) [@researcher](https://community.cartalk.com/u/researcher)\ **Post date:** [May 22, 2009, 7:10pm UTC](https://community.cartalk.com/t/sbc-283/30815/11 "2009-05-22T19:10:00Z")
I gather that cylinders were not bored oversize and honed to fit new pistons. So did you hone the cylinders to give the rings something to seat against? Were the pistons renewed? How many miles on the 283 before it was rebuilt. You will have a lot of blowby until you get the rings to seat. In fact I would not even do a compression check or leak down test until there is 500 to 1000 miles break in miles on this engine. ---
**Author:** ![67chevelle300](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/67chevelle300/32/1288_2.png) [@67chevelle300](https://community.cartalk.com/u/67chevelle300)\ **Post date:** [May 23, 2009, 3:59am UTC](https://community.cartalk.com/t/sbc-283/30815/12 "2009-05-23T03:59:23Z")
o yeah today i pulled it back apart and got a new set of chrome-moly rings and it dosent have near as much blowby and i had to check the ring gaps and i found that the old rings had two that were close to 40 thousands or more ---
**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\ **Post date:** [May 23, 2009, 12:29pm UTC](https://community.cartalk.com/t/sbc-283/30815/13 "2009-05-23T12:29:41Z")
That sounds like a lot of work you have put into that engine. I’m glad you came back with your fix. If there are problems with the engine later, you’ll “call back”, won’t you? ---
**Author:** ![67chevelle300](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/67chevelle300/32/1288_2.png) [@67chevelle300](https://community.cartalk.com/u/67chevelle300)\ **Post date:** [May 23, 2009, 4:31pm UTC](https://community.cartalk.com/t/sbc-283/30815/14 "2009-05-23T16:31:10Z")
yeah this is the first budget engine ive ever built im used to putting togther forged small and big blocks and i know how much gap you want to run and such but im good now it sounds great and i love how that little mouse likes to spin up im gonna start putting my forged 402 back togther now i just got to get the heads gone through