valve springs

nando · 06-28-2005, 07:43 PM

I want to remove the valve springs on an M20 head. I've taken everything else apart. is there a part # for a compressor or a universal one I can purchase?

also, is it worth it to replace them with new ones? I have a new set that I picked up cheap, but I know springs don't really wear out (unless they break).

also I'll have an i cam, dual valve springs and 12 used rockers for sale if anyone is interested for their ETA.

rs4pro3 · 06-28-2005, 07:56 PM

Sears has a big C-clamp shaped compressor that I've had excellant use out of, no other compressor I've tried can handle the dual valve springs.http://www.sears.com/sr/javasr/produ...id=00947627000

nando · 06-28-2005, 08:05 PM

awesome! it's cheap too..

while were on the subject of heads, anyone know of the best place to get a shrick cam? IE is the cheapest I've found so far, and I haven't seen the dual pattern cams anywhere else either.

BahnE30 · 06-28-2005, 08:46 PM

racetep.com maybe, i donno jordan used them.

EtaSport · 07-05-2005, 02:16 PM

Gonna do some head work eh nando? Its worth it. I made a compressor from a 9 inch C clamp from autozone. Welded a piece of pipe to the end so it would sit on top of the retainer and I could still get the keepers in/out. It worked great for the single eta springs, but the dual springs were tough to compress.

Oh, and its worth it to get a good cam. The reground I got required oversized eccentrics that set me back another 100 buck. So if you can find a new schrick that has plenty of lobe height you can use stock eccentrics.

nando · 07-05-2005, 02:36 PM

yeah oddly enough BMP has a good selecton and halfway decent prices. I just need to decide on the duration/lift. gotta pick up my sears spring compressor today

EtaSport · 07-05-2005, 02:57 PM

Yea, ordered the eccentrics from them. The cam I got was advertised as a 274 intake and exhaust, and wow does it lope at idle. Right now I still have the 1.0 motronic and its a little rough. Vacuum decreases slightly (as any cammed car will), but still had around 10 inches at idle. Should be a bit smoother with 1.3 swap.

Still has great low end, but really shines up high around 3500. With a b25 you should be good with a 272 or a 274 single pattern. If you want to go for some more, maybe 288/274.

Considering any port work, compression increase?

MR 325 · 07-05-2005, 03:03 PM

I heart my 282

nando · 07-05-2005, 03:27 PM

I'm doing basic porting with gasket matching, polished exhaust and combustion chamber. stock compression for now, I'll be using this head later for a stroker.

as far as idle, I have a chip that raises the idle to 800rpm. I'll be using this in my auto (for now) so hopefully I won't be doing a brake stand everytime I come to a stop.

anyone have experience with a dual pattern? I was thinking of the 282/272 with 11.5mm/11.0mm of lift. what is the advantage? I do want to keep daily driveablity as this will be my only car for the forseeable future.

nando · 07-05-2005, 08:49 PM

got my spring compressor, it works perfect. best $20 I ever spent.

also decided on the dual pattern cam after talking to a few people. this should be fun.

rs4pro3 · 07-06-2005, 04:45 AM

It's a great compressor. I was able to do an eta head with those autozone OHC ones, but ended up ripping the thing apart when doing I-springs. I've had the Sears one for 1.5 years now and have torn down probally 7-10 heads with no problems.

DrMcDave · 08-08-2005, 09:36 PM

are you doing a full head rebuild? mine really needs it. I have ticking and would like to pull a bit more power out of my 2.5 if possible while i am doing the headwork. I am interested in cost figures

nando · 08-09-2005, 09:30 AM

the parts for the head aren't that bad, and if you already have a good core (I didn't) you won't have to spend as much. I have $1500 into mine but I had to buy a good core.

DrMcDave · 08-09-2005, 07:15 PM

Quote:

Originally Posted by nando

the parts for the head aren't that bad, and if you already have a good core (I didn't) you won't have to spend as much. I have $1500 into mine but I had to buy a good core.

could you possibly list what you have done. I can shop around for prices for stuff, but i am curious what all you have done. Does this include any machine work- 3 angle grind or port matching?

EtaSport · 08-10-2005, 12:25 PM

I'd recommed some work dave. Slight port increase, with matched intake manifold. Polished chambers and exhaust ports, and like you said, 3 angle valve grind. Look for a cam and maybe upgraded valve springs. A good machine shop will be able to build this head for you, or its easily done on your own. The porting I would have them do however, its a pain if your taking a lot of material off (or if you do need a valve job). Finish it up with a new set of valve seals, a cam seal and you'll be set.

06-28-2005, 07:43 PM	#1
nando Moderator Join Date: Nov 2003 Location: bellingham, wa Posts: 25,731 Images: 2	valve springs I want to remove the valve springs on an M20 head. I've taken everything else apart. is there a part # for a compressor or a universal one I can purchase? also, is it worth it to replace them with new ones? I have a new set that I picked up cheap, but I know springs don't really wear out (unless they break). also I'll have an i cam, dual valve springs and 12 used rockers for sale if anyone is interested for their ETA. __________________ Build thread R3v helped me raise $3000 for cancer research

06-28-2005, 07:56 PM	#2
rs4pro3 R3V Elite Join Date: Oct 2003 Location: Chattanooga, TN Posts: 5,808 Images: 534	Sears has a big C-clamp shaped compressor that I've had excellant use out of, no other compressor I've tried can handle the dual valve springs.http://www.sears.com/sr/javasr/produ...id=00947627000 __________________ 85 325e 2.7 ITB'd stroker

06-28-2005, 08:05 PM	#3
nando Moderator Join Date: Nov 2003 Location: bellingham, wa Posts: 25,731 Images: 2	awesome! it's cheap too.. while were on the subject of heads, anyone know of the best place to get a shrick cam? IE is the cheapest I've found so far, and I haven't seen the dual pattern cams anywhere else either. __________________ Build thread R3v helped me raise $3000 for cancer research

07-05-2005, 02:16 PM	#5
EtaSport R3VLimited Join Date: Oct 2003 Location: Mechanicsburg, PA. h-patch MD Posts: 2,843 Images: 101	Gonna do some head work eh nando? Its worth it. I made a compressor from a 9 inch C clamp from autozone. Welded a piece of pipe to the end so it would sit on top of the retainer and I could still get the keepers in/out. It worked great for the single eta springs, but the dual springs were tough to compress. Oh, and its worth it to get a good cam. The reground I got required oversized eccentrics that set me back another 100 buck. So if you can find a new schrick that has plenty of lobe height you can use stock eccentrics. __________________ Old and improved:

07-05-2005, 02:36 PM	#6
nando Moderator Join Date: Nov 2003 Location: bellingham, wa Posts: 25,731 Images: 2	yeah oddly enough BMP has a good selecton and halfway decent prices. I just need to decide on the duration/lift. gotta pick up my sears spring compressor today __________________ Build thread R3v helped me raise $3000 for cancer research

06-28-2005, 08:46 PM	#4
BahnE30 E30 Enthusiast Join Date: Oct 2003 Location: Canada Posts: 1,050 Images: 3	racetep.com maybe, i donno jordan used them.

07-05-2005, 02:57 PM	#7
EtaSport R3VLimited Join Date: Oct 2003 Location: Mechanicsburg, PA. h-patch MD Posts: 2,843 Images: 101	Yea, ordered the eccentrics from them. The cam I got was advertised as a 274 intake and exhaust, and wow does it lope at idle. Right now I still have the 1.0 motronic and its a little rough. Vacuum decreases slightly (as any cammed car will), but still had around 10 inches at idle. Should be a bit smoother with 1.3 swap. Still has great low end, but really shines up high around 3500. With a b25 you should be good with a 272 or a 274 single pattern. If you want to go for some more, maybe 288/274. Considering any port work, compression increase? __________________ Old and improved:

07-05-2005, 03:03 PM	#8
MR 325 Moderator Join Date: Oct 2003 Location: La Crescenta, CA Posts: 31,705 Images: 1035	I heart my 282 __________________ 1991 E30 M-Technic 327i Turbo --- 1986 E30 325iS --- 1997 E36 M3/4/5 Ported, Polished, & Rebuilt M20 Cylinder Heads CLICK HERE!

07-05-2005, 03:27 PM	#9
nando Moderator Join Date: Nov 2003 Location: bellingham, wa Posts: 25,731 Images: 2	I'm doing basic porting with gasket matching, polished exhaust and combustion chamber. stock compression for now, I'll be using this head later for a stroker. as far as idle, I have a chip that raises the idle to 800rpm. I'll be using this in my auto (for now) so hopefully I won't be doing a brake stand everytime I come to a stop. anyone have experience with a dual pattern? I was thinking of the 282/272 with 11.5mm/11.0mm of lift. what is the advantage? I do want to keep daily driveablity as this will be my only car for the forseeable future. __________________ Build thread R3v helped me raise $3000 for cancer research

07-05-2005, 08:49 PM	#10
nando Moderator Join Date: Nov 2003 Location: bellingham, wa Posts: 25,731 Images: 2	got my spring compressor, it works perfect. best $20 I ever spent. also decided on the dual pattern cam after talking to a few people. this should be fun. __________________ Build thread R3v helped me raise $3000 for cancer research

07-06-2005, 04:45 AM	#11
rs4pro3 R3V Elite Join Date: Oct 2003 Location: Chattanooga, TN Posts: 5,808 Images: 534	It's a great compressor. I was able to do an eta head with those autozone OHC ones, but ended up ripping the thing apart when doing I-springs. I've had the Sears one for 1.5 years now and have torn down probally 7-10 heads with no problems. __________________ 85 325e 2.7 ITB'd stroker

08-08-2005, 09:36 PM	#12
DrMcDave E30 Mastermind Join Date: Oct 2003 Location: Gettysburg, PA Posts: 1,771	are you doing a full head rebuild? mine really needs it. I have ticking and would like to pull a bit more power out of my 2.5 if possible while i am doing the headwork. I am interested in cost figures

08-09-2005, 09:30 AM	#13
nando Moderator Join Date: Nov 2003 Location: bellingham, wa Posts: 25,731 Images: 2	the parts for the head aren't that bad, and if you already have a good core (I didn't) you won't have to spend as much. I have $1500 into mine but I had to buy a good core. __________________ Build thread R3v helped me raise $3000 for cancer research

08-10-2005, 12:25 PM	#15
EtaSport R3VLimited Join Date: Oct 2003 Location: Mechanicsburg, PA. h-patch MD Posts: 2,843 Images: 101	I'd recommed some work dave. Slight port increase, with matched intake manifold. Polished chambers and exhaust ports, and like you said, 3 angle valve grind. Look for a cam and maybe upgraded valve springs. A good machine shop will be able to build this head for you, or its easily done on your own. The porting I would have them do however, its a pain if your taking a lot of material off (or if you do need a valve job). Finish it up with a new set of valve seals, a cam seal and you'll be set. __________________ Old and improved: