Identification help and suggestions needed for "new" ZC. - D-series.org

Go Back   D-series.org Motor Mayhem & Suspension Satisfaction DOHC ZC

D-Series.org is the premier Honda All Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 02-12-2014, 08:00 AM   #1 (permalink)
n00b
 
iTrader: (0)
Join Date: Jan 2013
Posts: 13
Rep Power: 0 CrxCarl is nobody
iTrader Score: 0 reviews
Default Identification help and suggestions needed for "new" ZC.

Hello all,

I recently found a DOHC ZC locally for $250. I picked it up after the urging of members over at the CRX Community. I am confused on which generation it is though. I have read lots of stuff on the ZCR and here, and over at the Community. I was thinking it was a third generation (OBD0) engine, but now think it is a fourth generation (OBD1). I need some input. The intake manifold along with the block are both stamped PM7. A PM7 stamped intake manifold should mean it is OBD0. But, there is a rubber plug on the exhaust cam where the cam angle sensor should be which would mean this is an OBD1 fourth generation engine. So, does it matter which intake manifold is on the car? There should be a MAP sensor on the throttle body for a generation 4 as well. That is off the motor and sitting on my work bench. Been cold lately so I haven't really looked any more closely than what is pictured. I suppose I need to look at what distributor is on the engine too. If this is OBD1, do I go with a P29 ECU or can I just chip my PM6 that is currently in the car? I should mention, my CRX is a 1991 Si. I also got some exhaust manifold with the car. Not sure about that either. I would be more than happy to take more pictures and look for more info/stampings on the engine if somebody with more knowledge just points me in the right direction.

Second part of this post is this: what should I replace? I don't terribly want to dive too deep into the engine. I am planning more on things like timing belt, tensioner, water pump, alternator belt (probably take the alternator to auto zone just to have it tested), oil pan gasket. Is there anything else I should look in to replacing? And do any of these parts change from generation 3 and generation 4?


Been in to CRXs for years, but this is my first swap and don't really want to mess this up.

Thanks in advance.








CrxCarl is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 02-12-2014, 08:12 AM   #2 (permalink)
D-series G0D
 
2jzdreamin's Avatar
 
iTrader: (49)
Join Date: Aug 2009
Location: C.T.
Posts: 5,819
Rep Power: 30 2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !
2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !2jzdreamin is on a level you can only DREAM about! ! !
iTrader Score: 49 reviews
Default

The engine harness is obd1. The distributor might be an obd2 as I only see one plug for it,I think it's a y8 distributor.

Look at the head right behind the dip stick there's numbers there. One of the numbers is the year.

Since your putting it in a crx you either keep it obd1 and get an ecu jumper or convert the motor to obd0.
__________________
MY BUILD THREAD WITH WIRE AND BRAKE LINE TUCK
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


PM me for obd1,obd2 & k-series tucked harnesses

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

all so do vtec sub-harness

MAGIC-WIRES FOR YOUR ENGINE HARNESS NEEDS

instagram @magicman9won4
2jzdreamin is offline   Reply With Quote Quick reply to this message
Old 02-12-2014, 08:21 AM   #3 (permalink)
n00b
 
iTrader: (0)
Join Date: Jan 2013
Posts: 13
Rep Power: 0 CrxCarl is nobody
iTrader Score: 0 reviews
Default

I would guess that buying the jumper would be easier, no? The head sure looks like it says 90 on it. What kind of hodge podge motor did I buy?
CrxCarl is offline   Reply With Quote Quick reply to this message
 
Old 02-12-2014, 10:18 AM   #4 (permalink)
D-series soldier
 
theotherchris's Avatar
 
iTrader: (5)
Join Date: Sep 2010
Location: Coon Rapids MN
Posts: 786
Rep Power: 13 theotherchris is hot as a volcano
theotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcano
iTrader Score: 5 reviews
Default

You bought a great motor!!!! Not some "Hodge podge "bahaha
If the head says ninety its more than likely obd0 and someone "converted" it to obd1

Judging by the fuel rail i'd say the intake is also obd0 the manifold bolt patterns are the same...however the throttle body pattern is different

Last edited by theotherchris; 02-12-2014 at 10:22 AM. Reason: Cuz I can
theotherchris is offline   Reply With Quote Quick reply to this message
Old 02-12-2014, 11:17 AM   #5 (permalink)
n00b
 
iTrader: (0)
Join Date: Jan 2013
Posts: 13
Rep Power: 0 CrxCarl is nobody
iTrader Score: 0 reviews
Default

So, should I convert back to OBD0 or just get a jumper harness and run OBD1? Which would be cheaper/easier?
CrxCarl is offline   Reply With Quote Quick reply to this message
Old 02-12-2014, 02:43 PM   #6 (permalink)
()*#$(*$
 
The_Acid_Beaver's Avatar
 
iTrader: (28)
Join Date: Oct 2006
Location: In a state of denial
Posts: 11,404
Rep Power: 0 The_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edge
The_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edge
iTrader Score: 28 reviews
Send a message via AIM to The_Acid_Beaver
Default

That's not OBD0, even if the engine might be OBD0. At the very least, it has been converted to OBD1. If it was OBD0 or pre-OBD then it would have an external CAS mounted on the exhaust cam.
__________________
Not so obvious and ruthlessly odd . . .

I don't give a damn about my bad reputation.

RTFM. No, really. Do it.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
The_Acid_Beaver is offline   Reply With Quote Quick reply to this message
Old 02-12-2014, 05:13 PM   #7 (permalink)
n00b
 
iTrader: (0)
Join Date: Jan 2013
Posts: 13
Rep Power: 0 CrxCarl is nobody
iTrader Score: 0 reviews
Default

Okay, here is an update with a couple pictures. This is what I think they did. OBD0 block, intake manifold, head. Removed the cam position sensor. Changed out the distributor for an OBD1 unit. Stuck a throttle body on the PM7 IM from an OBD1 car with a MAP sensor on the actual throttle body. Sound about right? Also, don't you have to change injectors to convert a DOHC ZC from OBD0 to OBD1?

At this point, a jumper harness sounds cheaper and easier than tracking down the parts and converting back to OBD0. Or am I wrong on this one?

Thanks.

CrxCarl is offline   Reply With Quote Quick reply to this message
Old 02-12-2014, 06:56 PM   #8 (permalink)
D-series soldier
 
theotherchris's Avatar
 
iTrader: (5)
Join Date: Sep 2010
Location: Coon Rapids MN
Posts: 786
Rep Power: 13 theotherchris is hot as a volcano
theotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcanotheotherchris is hot as a volcano
iTrader Score: 5 reviews
Default

Let's see the injector clips...I never changed my injectors when I converted.
theotherchris is offline   Reply With Quote Quick reply to this message
Old 02-12-2014, 07:22 PM   #9 (permalink)
n00b
 
seandonn's Avatar
 
iTrader: (0)
Join Date: Dec 2012
Location: florida
Posts: 33
Rep Power: 0 seandonn is learning the way of the Dseandonn is learning the way of the D
iTrader Score: 0 reviews
Default

"Sound about right?" Yes, pretty close. No you do not have to change the injectors when converting from obd0 to obd1. I'd stay obd1, I also converted mine from obd0 to obd1.
seandonn is offline   Reply With Quote Quick reply to this message
Old 02-12-2014, 07:36 PM   #10 (permalink)
n00b
 
iTrader: (0)
Join Date: Jan 2013
Posts: 13
Rep Power: 0 CrxCarl is nobody
iTrader Score: 0 reviews
Default

The guy I bought this from took it in a trade with an Integra. He said it was mounted in the car but had not been run. He said the previous owner never got it going. I am doubting this now. Somebody played with this engine. I am sure it didn't come over from Japan like this. I think I might do a little more internal snooping than I had planned before dropping this in.
CrxCarl is offline   Reply With Quote Quick reply to this message
Old 02-12-2014, 07:37 PM   #11 (permalink)
n00b
 
iTrader: (0)
Join Date: Jan 2013
Posts: 13
Rep Power: 0 CrxCarl is nobody
iTrader Score: 0 reviews
Default

I appreciate everybody holding my hand through this process.
CrxCarl is offline   Reply With Quote Quick reply to this message
Old 02-14-2014, 11:57 AM   #12 (permalink)
()*#$(*$
 
The_Acid_Beaver's Avatar
 
iTrader: (28)
Join Date: Oct 2006
Location: In a state of denial
Posts: 11,404
Rep Power: 0 The_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edge
The_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edgeThe_Acid_Beaver is off the edge
iTrader Score: 28 reviews
Send a message via AIM to The_Acid_Beaver
Default

OBD1+ Injectors are high impedance and do not require and should NOT be run with an injector resistor pack. So, if you eliminate the injector resistor then you don't need to change the injectors. Well, first you should actually measure the resistance across the terminals of the injectors to determine if they are high or low impedance.

If it's already converted to OBD1, then it will be easier to run it OBD1.
__________________
Not so obvious and ruthlessly odd . . .

I don't give a damn about my bad reputation.

RTFM. No, really. Do it.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
The_Acid_Beaver is offline   Reply With Quote Quick reply to this message
Old 02-24-2014, 09:43 AM   #13 (permalink)
D-series lover
 
Slo Mini me's Avatar
 
iTrader: (2)
Join Date: Nov 2013
Location: BFE
Posts: 286
Rep Power: 6 Slo Mini me will become famous soon enoughSlo Mini me will become famous soon enoughSlo Mini me will become famous soon enough
iTrader Score: 2 reviews
Default

Looks like a pretty clean engine anyways for the price. Hopefully no gremlins.
__________________
:Remember the difference between Fast and Furious and Fast and Stupid is a blown up engine or death. Drive within your means.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Slo Mini me is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the D-series.org forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Security Question
*Required, this field is not shown to others: While balancing on a piece of wood, two inches by four inches known as a 2x4, john and his friend sally both spotted a dalmatian inside a truck with sirens, headed to put out a fire. State what kind of animal is mentioned in the sentence above.
Insurance
Please select your insurance company (Optional)

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


iconAll times are GMT -8. The time now is 06:59 PM. | Welcome to Forum, please register to access all of our features.