Worn distibutor question..
Thread Starter
Cruising
Joined: Dec 2004
Posts: 13
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Worn distibutor question..
Guys I have 181K on my 88 vette. I would like to replace the distributor to see if I can get it to idle better. So the question is how much play can the rotor assembly have up and down? there is no lateral movement just up and down. Also since it idles rough Im really assuming its low or uneven compression. So Im replacing all outer parts now so when I get to rebuilding it I will have a total new L98.
Melting Slicks
Joined: Feb 2006
Posts: 2,753
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From: backwoods upstate ny
up and down movement was designed into your disrtrib to carry oil into the lower bushing (the upper is lubed from the grease reservoir there, but loads are much less severe than the lower bushing sees)...do not remove the ''slop'' from the up/down unless you frequently have your distributor out and oil the lower bushing manually.
your rough idle is very likely due to worn valve seats AND guides....oem valve guides have two seals rather than one (which would suffice for oil control) to reduce cat contamination (feds say the factory MUST replace any emission component which fails before 50k.
your rough idle is very likely due to worn valve seats AND guides....oem valve guides have two seals rather than one (which would suffice for oil control) to reduce cat contamination (feds say the factory MUST replace any emission component which fails before 50k.
Last edited by redrose; Sep 24, 2006 at 09:53 AM.
Race Director
Joined: Jun 2004
Posts: 13,966
Likes: 710
From: WI
Here are two nice topics on shimming:
http://forums.corvetteforum.com/show...gear+installed
http://forums.corvetteforum.com/show...gear+installed
I shimmed mine with this kit:
http://www.jegs.com/webapp/wcs/store...tegoryId=18435
Five dollar, much cheaper then $$$$$$ for a new distrib.
http://forums.corvetteforum.com/show...gear+installed
http://forums.corvetteforum.com/show...gear+installed
I shimmed mine with this kit:
http://www.jegs.com/webapp/wcs/store...tegoryId=18435
Five dollar, much cheaper then $$$$$$ for a new distrib.
Thread Starter
Cruising
Joined: Dec 2004
Posts: 13
Likes: 0
How about even compression in cylinders
Thanks Guys.
One more ? then. Could my bad idle and light load driving issues be caused by uneven compression? It does have 181K miles. What are your thoughts? Let me add this; I had the throttle body rebuilt, replaced EGR valve and injectors. This fixed other problems I had but not this.
Bottom line, From what I have and what you might be saying is that I need to do a rebuild soon. If so what price range would I be looking at for a close to stock engine?
Thanks
One more ? then. Could my bad idle and light load driving issues be caused by uneven compression? It does have 181K miles. What are your thoughts? Let me add this; I had the throttle body rebuilt, replaced EGR valve and injectors. This fixed other problems I had but not this.
Bottom line, From what I have and what you might be saying is that I need to do a rebuild soon. If so what price range would I be looking at for a close to stock engine?
Thanks
Last edited by Lee A. McKinley; Sep 26, 2006 at 08:34 PM.
Race Director
Joined: Feb 2004
Posts: 12,518
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Originally Posted by Lee A. McKinley
Thanks Guys.
One more ? then. Could my bad idle and light load driving issues be caused by uneven compression? It does have 181K miles. What are your thoughts? Let me add this; I had the throttle body rebuilt, replaced EGR valve and injectors. This fixed other problems I had but not this.
Bottom line, From what I have and what you might be saying is that I need to do a rebuild soon. If so what price range would I be looking at for a close to stock engine?
Thanks
One more ? then. Could my bad idle and light load driving issues be caused by uneven compression? It does have 181K miles. What are your thoughts? Let me add this; I had the throttle body rebuilt, replaced EGR valve and injectors. This fixed other problems I had but not this.
Bottom line, From what I have and what you might be saying is that I need to do a rebuild soon. If so what price range would I be looking at for a close to stock engine?
Thanks
Post them for us to look at.
