CC Heads |
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CC Heads |
revhi109 |
Nov 13 2013, 03:30 PM
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#1
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Member Group: Members Posts: 73 Joined: 20-April 12 From: Minnesota Member No.: 14,404 Region Association: None |
Due to lack of compression I have removed both my heads to bring into the machine shop. As I was cleaning them I noticed a few minor casting details. I checked the part number on both heads and this is what I came up with.
021-101-371-S (1.8 Bus) Passenger side 022-101-372-G (2.0 Bus) Drivers side The guy I bought this "rebuilt" engine from must have mixed and matched a few components. When I get these heads re-surfaced, do you think the CC's will be close? Ive never built an engine like this before. |
stugray |
Nov 14 2013, 12:12 AM
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#2
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Advanced Member Group: Members Posts: 3,824 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
I dont know how that is even possible.
I thought (about to get 'lerned') that you could not mix 1.8L & 2.0L because they are always 3 vs 4 bolt patterns on the intake side. I am probably wrong when it comes to bus parts though. |
gothspeed |
Nov 14 2013, 12:15 AM
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#3
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Senior Member Group: Members Posts: 1,539 Joined: 3-February 09 From: SoCal Member No.: 10,019 Region Association: None |
I dont know how that is even possible. I thought (about to get 'lerned') that you could not mix 1.8L & 2.0L because they are always 3 vs 4 bolt patterns on the intake side. I am probably wrong when it comes to bus parts though. +1 ... 'bus' 2.0 heads have 4 bolts on the intake as well ... but I believe the chambers and possibly also valve sizes are different from each other.... (IMG:style_emoticons/default/popcorn[1].gif) |
revhi109 |
Nov 14 2013, 07:20 AM
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#4
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Member Group: Members Posts: 73 Joined: 20-April 12 From: Minnesota Member No.: 14,404 Region Association: None |
They both have 4 intake studs. I will have to get a caliper and measure both valves to double check that. If that's the case this rebuild might be a little more expensive than I was thinking.
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SLITS |
Nov 14 2013, 07:58 AM
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#5
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
Stock configuration:
021 101 371S ... 39.3mm Intake X 34mm Exhaust. FI head ('74 1.8L) 022 101 372G ... 37.5mm Intake X 33mm Exhaust. FI head ('76-'78 2.0L) Combustion chambers have a slightly different shape between the two. Interchangeable. "G" heads could have had the valves upped in size when rebuilt. |
revhi109 |
Nov 14 2013, 08:13 AM
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#6
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Member Group: Members Posts: 73 Joined: 20-April 12 From: Minnesota Member No.: 14,404 Region Association: None |
I did remove the valves to clean and noticed that one head had vintage looking valve with the VW logo on them and the other head looked like more modern valves. Would it be frowned upon to use 2 differently shaped chambers? This rebuild is turning into a disaster. The sad part about all of this is that the car came with a blown 2.0L engine. And I have this guy the core. As I've learned more about these engines I realize that was a huge mistake.
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Cupomeat |
Nov 14 2013, 08:46 AM
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#7
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missing my NY 914 in VA Group: Members Posts: 1,336 Joined: 26-November 07 From: Oakton VA Member No.: 8,376 Region Association: MidAtlantic Region |
I did remove the valves to clean and noticed that one head had vintage looking valve with the VW logo on them and the other head looked like more modern valves. Would it be frowned upon to use 2 differently shaped chambers? This rebuild is turning into a disaster. The sad part about all of this is that the car came with a blown 2.0L engine. And I have this guy the core. As I've learned more about these engines I realize that was a huge mistake. Don't give up, this will be worth it in the end. See if you can pick up a set of rebuilt 1.8l heads as they are much better flowing than the 2.0l bus and 1.7l 914 heads, plus you will not need to get new intake manifolds (for the proper 2.0l intake bolt config) nor new tin (to move the spark plug to the 2.0l lower location). Don't let this drag you down, but given the possibility of mixing and matching lots of parts on these cars, a few unscrupulous or clueless people will have done whatever it took to get it running/sold/etc. (IMG:style_emoticons/default/welcome.png) |
revhi109 |
Nov 14 2013, 09:04 AM
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#8
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Member Group: Members Posts: 73 Joined: 20-April 12 From: Minnesota Member No.: 14,404 Region Association: None |
Luckily I still have both style tin and intake manifolds for the 2.0. I will try searching for a set of matching rebuilt heads. No point in spending the money rebuilding 2 oddball bus heads... FML
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Cupomeat |
Nov 14 2013, 05:08 PM
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#9
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missing my NY 914 in VA Group: Members Posts: 1,336 Joined: 26-November 07 From: Oakton VA Member No.: 8,376 Region Association: MidAtlantic Region |
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cwpeden |
Nov 14 2013, 06:10 PM
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#10
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Great White North, huh? Group: Members Posts: 916 Joined: 20-August 06 From: Victoria BC Member No.: 6,693 Region Association: Canada |
I would take a close look at the rest of the rotating assembly too. Mix of rods, pistons and cylinders. I had a motor with 6mm rockers on one side and 8mm on the other.
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revhi109 |
Nov 14 2013, 08:31 PM
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#11
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Member Group: Members Posts: 73 Joined: 20-April 12 From: Minnesota Member No.: 14,404 Region Association: None |
Just ordered a matching pair of 1.8 heads on here. How do you measure the rockers? Hope its legit.
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914itis |
Nov 14 2013, 08:43 PM
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#12
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Advanced Member Group: Members Posts: 2,892 Joined: 9-October 10 From: New York City Member No.: 12,256 Region Association: North East States |
I am packing them right now. |
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