5.2/5.9 Conflicting Answers

joemadoo · 08-01-2008, 05:03 PM

I've been doing research for a few days now and I can't seem to get any straight answers.

I have a 97 ZJ with a 5.2 V8.

I recently bought a 5.9 shortblock (supposedly for a 98 Grand Cherokee) and reassembled it using a 5.9 Harmonic Balancer and a 5.9 HG set. The 5.2 flexplate bolted up and I used that also. I'm starting to find out that I might need a 5.9 Torque Converter for balancing?

I'm showing around 70-75 psi compression on all 8 cylinders when i know it should be around 130. The 5.9 block seemed to have beveled pistons that didnt quite come up to the deck and my old 5.2 had flat ones that came to the very top of the deck.

Does anyone know or know someone who knows what I need to make this monster work?

Joe

**HighLonesome** · 08-01-2008, 05:09 PM

You can't use the 5.2 flexplate. You've got to use a 5.9 flexplate. The torque converter is fine.

Don't know about the piston. The Silvolites in my rebuilt 5.9 are flat and come to the top.

What is HG set?

nashmd454 · 08-01-2008, 05:15 PM

I told you who I thought could help you and one has already chimed in.

**HighLonesome** · 08-01-2008, 05:24 PM

I wish I knew the answer to the piston question. I've never had the heads off my stock 5.9, but I think the Silvolites are an OEM-style replacment on my other 5.9.

The deal with the flexplate:
For the externally balanced 360, Chrysler moved the balancing weights from the torque converter to the flexplate in '96. The 318 flexplate doesn't have those weights, because the 318 is internally balanced. So a 5.2 flexplate will cause a serious imbalance behind the 5.9.

joemadoo · 08-01-2008, 05:33 PM

Quote:

The deal with the flexplate:

Ok, 1 straight answer down. Thanks five.nein... Unfortunately that means I have to pull the engine out again...

I'm thinking the engine shop didn't use the correct pistons. I can't think of anything else cause the bad compression.

BradMB2004 · 08-01-2008, 05:43 PM

cam timing

**HighLonesome** · 08-01-2008, 05:52 PM

Here's the flexplate you need joemadoo, cheaper than a torque converter.

http://www.hughesengines.com/partDetail.asp?partID=11137&eTypeID=10

joemadoo · 08-01-2008, 05:59 PM

Cool, I actually just found that site when you PMed me back.

Quote:

cam timing

I didnt even double check that. I just assumed the machine shop knew what they were doing...

nashmd454 · 08-01-2008, 09:37 PM

Quote:

Originally Posted by joemadoo

Ok, 1 straight answer down. Thanks five.nein... Unfortunately that means I have to pull the engine out again...

I'm thinking the engine shop didn't use the correct pistons. I can't think of anything else cause the bad compression.

you know what...you seem very rude. You seem to not be happy with anything...you send pm's and I say where to go and who to ask...not good enough...then you start another thread saying conflicting answers....I tell you who the best people are to ask on here...still not good enough. Take the engine out and put a real 5.9 in it and not a 5.2 with 5.9 parts...simple enough...hate that answer...take it to a shop. I can't believe I applauded you for the undertaking and was excited to hear when you go her purring...but now you just seem ungrateful. Sorry if that was not your intent...but that is how looks here on my end.

**5.9 ANDY** · 08-01-2008, 09:52 PM

Quote:

Originally Posted by nashmd454

you know what...you seem very rude. You seem to not be happy with anything...you send pm's and I say where to go and who to ask...not good enough...then you start another thread saying conflicting answers....I tell you who the best people are to ask on here...still not good enough. Take the engine out and put a real 5.9 in it and not a 5.2 with 5.9 parts...simple enough...hate that answer...take it to a shop. I can't believe I applauded you for the undertaking and was excited to hear when you go her purring...but now you just seem ungrateful. Sorry if that was not your intent...but that is how looks here on my end.

X2... kinda..... if you gona build a motor.... use parts for that motor, and if did any seroius research, you have discoverd that the 5.9 is externaly ballenced, and that the 5.2 isnt...

j.love · 08-02-2008, 08:41 AM

Quote:

Originally Posted by nashmd454

you know what...you seem very rude. You seem to not be happy with anything...you send pm's and I say where to go and who to ask...not good enough...then you start another thread saying conflicting answers....I tell you who the best people are to ask on here...still not good enough. Take the engine out and put a real 5.9 in it and not a 5.2 with 5.9 parts...simple enough...hate that answer...take it to a shop. I can't believe I applauded you for the undertaking and was excited to hear when you go her purring...but now you just seem ungrateful. Sorry if that was not your intent...but that is how looks here on my end.

I just used this button!

joemadoo · 08-02-2008, 09:42 AM

Quote:

you know what...you seem very rude. You seem to not be happy with anything...you send pm's and I say where to go and who to ask...not good enough...then you start another thread saying conflicting answers....I tell you who the best people are to ask on here...still not good enough. Take the engine out and put a real 5.9 in it and not a 5.2 with 5.9 parts...simple enough...hate that answer...take it to a shop. I can't believe I applauded you for the undertaking and was excited to hear when you go her purring...but now you just seem ungrateful. Sorry if that was not your intent...but that is how looks here on my end.

How do I seem rude? Sorry I'm frustrated because I can't get my "fake" 5.9 to work. Come to think of it, I've learned tons from 5.9 ANDY and five.nein, and NOTHING FROM YOU. So since you don't have anything relevant to say, DON'T chime in.

nashmd454 · 08-02-2008, 02:52 PM

Quote:

Originally Posted by joemadoo

How do I seem rude? Sorry I'm frustrated because I can't get my "fake" 5.9 to work. Come to think of it, I've learned tons from 5.9 ANDY and five.nein, and NOTHING FROM YOU. So since you don't have anything relevant to say, DON'T chime in.

relevant.....your hilarious...next time do not pm me and ask...I told you to ask them 2...you freaking

j.love · 08-02-2008, 03:48 PM

Quote:

Originally Posted by nashmd454

relevant.....your hilarious...next time do not pm me and ask...I told you to ask them 2...you freaking

good stuff.

nashmd454 · 08-02-2008, 04:49 PM

jlove...you instigator

...I am still trying to figure out what you meant by using the crawl this thread button. Anyways...on topic...or about the rant...I believe I said my peace. I am done with helping him out. To 5.9 Andy and five.niner...I am not sorry that I recommended you 2 to help him...you 2 are the best I know in this area of questions...but I am sorry that he doesn't see that as help.

08-01-2008, 05:43 PM	#6
BradMB2004 Registered User Join Date: Feb 2005 Posts: 635 Profile Gallery Classifieds My Jeeps	cam timing __________________ Brad 2004 Wrangler X 2001 Grand Cherokee Ltd. 1997 Grand Cherokee Ltd.