2.0 to 2.1 Head Swap (on Turbo model)? - SaabCentral Forums
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Old 19th November 2005
1985 Gripen's Avatar
1985 Gripen 1985 Gripen is offline
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Default 2.0 to 2.1 Head Swap (on Turbo model)?

If this has been covered before, I apologize. I tried doing an advanced search as "upgrade head 2.1" and came up with nothing.

I have an '85 900T, obviously with the 2.0 liter head. I have been wondering if I replace the head with a post-90 model year 2.1 liter (non-turbo) one if the stock APC unit can adjust all the parameters accordingly.

Also, can I just replace the 2.0 head with the 2.1 head outright (with proper gasket set, obviously) or is there more that has to be swapped-out?

I really know little about this, but my head gasket (at least) is currently blown (as evidenced by coolant in the oil) and I'm trying to plan what to do if the head itself is cracked. I can either replace the head itself with a like one or I can "upgrade" if it's not too much work.

Thanks in advance.
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Old 20th November 2005
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Saab-Daniel Saab-Daniel is offline
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Get the inlet-manifold too, then it's a straight swap. Need the right headgasket to go with that though...

Still preaching MS...!
They call him... "The Reverend"....

Now with C900 Monte Carlo Convertible, weekend-cruiser :-)
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Old 20th November 2005
SG SG is offline
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Yes. 2.1 inlet manifold and 2.1 head/2.3 (long)head - 93
is a nice upgrade. bolt on with the headgasket for the 2.1/2.3

Gives you more topend power and a lil less low end - but hey - thats what we want


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Old 20th November 2005
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Bennie Bennie is offline
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Originally Posted by SG

bolt on with the headgasket for the 2.1/2.3


I bolted a 2.3 head and a 2.1 inlet on my ex LPT and its a very nice upgrade! (car hold much more boost in the high rpm,s)

I thought that the 2.0/2.1/2.3 headgaskets are the same!?

Gr, Bennie
900s aero Trionic 5.5 and more hardware mods!
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Old 20th November 2005
DeLorean DeLorean is offline
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no, the headgaskets go like this -

2.0 block, you should use a 2.0 gasket NO MATTER WHAT HEAD YOU USE, however you probably could use a 2.1 gasket and have it work.

if you have a 2.1 block, you MUST use a 2.1 head gasket, NO MATTER WHAT HEAD YOU USE.

if you don't use a 2.1 head gasket on a 2.1 block, your pistons will tap the gasket any time the engine is running. the car will run, but it will sound broken.
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Old 24th November 2005
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Breakin5speeds Breakin5speeds is offline
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Yesssss 2.0 head gasket kit, 2.1 head, BUT big but, make sure you use the turbo cams, I believe exh is the same but the intake cam has a longer duration, also you need the 2.1 fuel rail, might as well, grab the 3.0 bar fuel pressure reg too while you're at it, ALSO being you have an 85 you need a LATER throttle, still with the big click click tps though, the 85 uses the intake manifold to bypass the throttle plate for idle, whereas the 2.1 intake relies on the throttle to have connections to bypass the plate. This is what I encountered when I swapped the head on my 87 spg, ALSO you need the Hoist/Grounding plate on the 2.1 head, else you wont be able to pull you engine if needed, or ground your harness.
"You pick up your best Girl, Get some Lutefisk sandwiches, annnd you go Ice Racing, That's a SAAB weekend" - Jay Leno

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