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 Post subject: B202 refresh
PostPosted: Sat Oct 03, 2020 3:23 pm 
Full Pressure Turbo

Joined: Wed Jun 18, 2008 6:31 pm
Posts: 827
Location: nottingham
Car Models: T16s
Bored with the bad weather so i thought i would strip down my spare engine (b202) in preparation for a winter refresh .I removed this engine some 3 years ago when i fitted a lower miles unit plus did the T5 conversion , the only issue it had was crank case pressure coming up the dipstick tube (rings).Pleasantly surprised as the head is good (held fuel over the valves for over an hour) & the bores are good (no steps & honing marks are there).So my questions are , what suppliers / manufactures of gaskets / seals / rings etc would you guys recommend ?..
The bores all measured 90 mm the shells are marked .25 mm 5510 & the caps 0132 25 ? .I presume this has had a rebore so ring & shell size are very important , plus my currant engine also suffers from crank case over pressure so if there are any improved rings i would be grateful to hear of them .
ImageIMG_20201003_104500 by B White, on Flickr
ImageIMG_20201003_125151 by B White, on Flickr

1993 T16s t5d.

 Post subject: Re: B202 refresh
PostPosted: Thu Oct 22, 2020 12:08 pm 
Active user

Joined: Sun Sep 16, 2018 5:56 pm
Posts: 32
Car Models: 900
I suspect if its a low mileage B202 blowing oil from the dipstick, its much more likely a blocked PCV than worn rings. Bores on these engines are renowned for their longevity.
I'm sure someone smarter than me will be along shortly though

 Post subject: Re: B202 refresh
PostPosted: Thu Oct 22, 2020 1:15 pm 
UKSaabs Trader
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Joined: Wed May 12, 2004 9:53 pm
Posts: 17951
Location: Devon
90mm is the standard bore size so if it measures 90.0mm then it hasn't been re-bored. As mentioned above, the bores are very hard-wearing on the B202 and don't often need re-boring. Perhaps the crankshaft has been reground, though.
The original gaskets and seals for Saab were made by Elring so genuine Saab or Elring makes sense. Elring will be cheaper.

Are the rings worn? How do the gaps compare with the workshop manual?
I don't know of any "improved" rings that will work better than standard rings in good condition.

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