For the engine rebuild gurus - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

puma · 09-06-2016, 05:17 PM

OK guys, trying to lift the heads on the FA20 because we are pretty sure we have a blown head gasket. This is my first subaru engine and not much experience engine wise so i am following the shop manual.

I am kind of confused to this portion, i am ready to remove the camshafts but i am not sure this part actually works. So far timing chains are off and from where they let me put the crankshaft and the camshaft, the intake valves on the LH side are open.

Now to remove the camshaft they want me to first turn the cranshaft 200 deg, which in my opinion will make the piston contact the intake valves???

here is the portion i am talking about

After this step, the next step is to turn the camshaft 180deg which i suppose will close the intake valves. Shouldn't i do that before i actually turn the crankshaft? Why in hell are they making me turn the crankshaft before i remove the camshaft?

thanks for any help

puma · 09-06-2016, 05:30 PM

Oh and an other question, do i actually have to remove the camshafts gears to remove the camshafts sub assembly or can i leave them installed?

spitfire481 · 09-06-2016, 09:16 PM

You can leave the sprockets attached to the cams. I always just rotate each one a little until there's no tension then remove the caps. Never had an issue. You will know if you have valve contact. Slight movements with no real force

puma · 09-06-2016, 09:22 PM

ok makes sense, do you have any idea why they say to do such a thing, i mean rotating the cranshaft before putting the intake valves free of tension?

spitfire481 · 09-06-2016, 09:41 PM

Quote:

Originally Posted by puma

ok makes sense, do you have any idea why they say to do such a thing, i mean rotating the cranshaft before putting the intake valves free of tension?

No idea. Some of their instructions are confusing and not really needed anyway. Just make sure the head is straight up when you pull the cams out. If not you will loose the rockers and valve shims. Make sure you store them so they go back in the same spot, unless you are replacing valves and or cams

puma · 09-06-2016, 09:50 PM

wow thanks i was going to remove them like that, i will rotate the engine, thanks for the warning!

spitfire481 · 09-06-2016, 09:59 PM

Quote:

Originally Posted by puma

wow thanks i was going to remove them like that, i will rotate the engine, thanks for the warning!

Once the cams come out they will all fall out with ease. Just pay close attention when you lift the cam up. Other than that it's all pretty straight forward. If you're not changing the cams or valves you can reuse the oem shims in there current locations. I'd still double check the clearances during assembly to make sure the factory was right but it should be fine

puma · 09-07-2016, 07:41 AM

thanks, i appreciate it, i will let you know how it went.

SoCal80six · 09-08-2016, 12:13 AM

Do they have any disassembly/assembly books for the fa20 or is it only online

Sent from my SM-G935T using Tapatalk

puma · 09-08-2016, 07:33 AM

i don't know i found mine online, they must have one at the dealer but must cost a fortune and it is he same thing as the online version.

09-06-2016, 05:17 PM	#1
puma crew chief Join Date: Mar 2014 Drives: Race car FR-S Location: Quebec Posts: 378 Thanks: 6 Thanked 189 Times in 82 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	For the engine rebuild gurus OK guys, trying to lift the heads on the FA20 because we are pretty sure we have a blown head gasket. This is my first subaru engine and not much experience engine wise so i am following the shop manual. I am kind of confused to this portion, i am ready to remove the camshafts but i am not sure this part actually works. So far timing chains are off and from where they let me put the crankshaft and the camshaft, the intake valves on the LH side are open. Now to remove the camshaft they want me to first turn the cranshaft 200 deg, which in my opinion will make the piston contact the intake valves??? here is the portion i am talking about After this step, the next step is to turn the camshaft 180deg which i suppose will close the intake valves. Shouldn't i do that before i actually turn the crankshaft? Why in hell are they making me turn the crankshaft before i remove the camshaft? thanks for any help

09-06-2016, 09:16 PM	#3
spitfire481 Senior Member Join Date: Mar 2013 Drives: 2JZ FRS Location: Pure Automotive Performance Posts: 1,378 Thanks: 97 Thanked 1,354 Times in 621 Posts Mentioned: 27 Post(s) Tagged: 2 Thread(s)	You can leave the sprockets attached to the cams. I always just rotate each one a little until there's no tension then remove the caps. Never had an issue. You will know if you have valve contact. Slight movements with no real force __________________ Pure Automotive Performance MoTeC Build Thread @spitfire481

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09-06-2016, 05:30 PM	#2
puma crew chief Join Date: Mar 2014 Drives: Race car FR-S Location: Quebec Posts: 378 Thanks: 6 Thanked 189 Times in 82 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	Oh and an other question, do i actually have to remove the camshafts gears to remove the camshafts sub assembly or can i leave them installed?

09-06-2016, 09:22 PM	#4
puma crew chief Join Date: Mar 2014 Drives: Race car FR-S Location: Quebec Posts: 378 Thanks: 6 Thanked 189 Times in 82 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	ok makes sense, do you have any idea why they say to do such a thing, i mean rotating the cranshaft before putting the intake valves free of tension?

09-06-2016, 09:50 PM	#6
puma crew chief Join Date: Mar 2014 Drives: Race car FR-S Location: Quebec Posts: 378 Thanks: 6 Thanked 189 Times in 82 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	wow thanks i was going to remove them like that, i will rotate the engine, thanks for the warning!

09-07-2016, 07:41 AM	#8
puma crew chief Join Date: Mar 2014 Drives: Race car FR-S Location: Quebec Posts: 378 Thanks: 6 Thanked 189 Times in 82 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	thanks, i appreciate it, i will let you know how it went.

09-08-2016, 12:13 AM	#9
SoCal80six Senior Member Join Date: Aug 2015 Drives: Asphalt frs Location: San diego, CA Posts: 354 Thanks: 226 Thanked 80 Times in 62 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Do they have any disassembly/assembly books for the fa20 or is it only online Sent from my SM-G935T using Tapatalk

09-08-2016, 07:33 AM	#10
puma crew chief Join Date: Mar 2014 Drives: Race car FR-S Location: Quebec Posts: 378 Thanks: 6 Thanked 189 Times in 82 Posts Mentioned: 14 Post(s) Tagged: 0 Thread(s)	i don't know i found mine online, they must have one at the dealer but must cost a fortune and it is he same thing as the online version.

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