harry yarnell Posted March 1, 2018 Share Posted March 1, 2018 '90 Reatta Is the HB a press-fit or slip-fit? Trying to replace a CPS and can't get the balancer off. I thought this year was a slip-fit. Havn't tried to pry...yet. I see no holes in the balancer to install a puller. Link to comment Share on other sites More sharing options...
AZVET Posted March 1, 2018 Share Posted March 1, 2018 I am quite sure that only the 88s and early 89s are a slip on design. Do a Google search to make sure though. In fact, I did a quick search at NAPA's site and found the 88 and 91s have different Dorman parts numbers. When I installed a new one on my 88 I rented a puller but was surprised that I did not need it as the old one slipped off easily. Link to comment Share on other sites More sharing options...
Cargirl Posted March 1, 2018 Share Posted March 1, 2018 This might help, it's from the Reatta Owners Journal, a great source for all things Reatta: :http://www.reattaowner.com/roj/component/content/article/index.php?option=com_content&view=article&catid=65:engine&id=234:harmonic-balancer-bolt-removal Link to comment Share on other sites More sharing options...
padgett Posted March 1, 2018 Share Posted March 1, 2018 Agree, my '90 is a press fit. Is there a way to tell which a loose balancer is ? Link to comment Share on other sites More sharing options...
Ronnie Posted March 1, 2018 Share Posted March 1, 2018 To my knowledge only the 1991 is a press fit balancer. RockAuto.com seems to agree as they list the same part numbers for 1988-1990 balancer. There are a number of reasons the balancer won't slide off easily. Corrosion and bad crankshaft key/keyway are two that come to mind, Link to comment Share on other sites More sharing options...
harry yarnell Posted March 1, 2018 Author Share Posted March 1, 2018 Actually I lied. The car is a '93 Riviera. Hey, it's the same as a Reatta. Not. The HB is pressed on. The three threaded puller holes are hidden behind slots. I got it off. Interesting, the CPS isn't adjustable as in earlier 3800's. It's one solid assy; You just just bolt it on and reinstall the HB. Link to comment Share on other sites More sharing options...
Ronnie Posted March 1, 2018 Share Posted March 1, 2018 7 minutes ago, harry yarnell said: Actually I lied. The car is a '93 Riviera. Hey, it's the same as a Reatta. Not. The HB is pressed on. The three threaded puller holes are hidden behind slots. I got it off. Interesting, the CPS isn't adjustable as in earlier 3800's. It's one solid assy; You just just bolt it on and reinstall the HB. No problem. We'll lie to you the next time we answer your questions. Link to comment Share on other sites More sharing options...
padgett Posted March 1, 2018 Share Posted March 1, 2018 Looks like all C (88-90) engines use the same balancer since it s the same crank, 25533717, "L" engine had a 24501594 so that must have been where it changed (nothing guaranteed from memory). Link to comment Share on other sites More sharing options...
DS_Porter 89 Burgandy Posted March 2, 2018 Share Posted March 2, 2018 10 hours ago, AZVET said: I am quite sure that only the 88s and early 89s are a slip on design. My '89 is a slip fit and I am glad it is. I have changed plenty of CPS's. Good that they changed to a non-adjustable CPS. Too late for us. I use a couple thicknesses of tape on each side of the slotted ring in order to align the CPS before tightening the clamp. Are there any better ideas? Link to comment Share on other sites More sharing options...
DAVES89 Posted March 2, 2018 Share Posted March 2, 2018 I have heard a business card works well. Link to comment Share on other sites More sharing options...
KDirk Posted March 2, 2018 Share Posted March 2, 2018 (edited) There was an official Kent Moore tool for adjusting the cps if you can find it. I have one, will need to dig it out and post the number later. Not difficult to turn up on eBay, that's where I bought mine. It does double duty to check the vanes on the back of the harmonic balancer are straight , as well. Edited March 2, 2018 by KDirk (see edit history) Link to comment Share on other sites More sharing options...
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