need help finding oem lq4 piston part #
Thread Starter
Teching In
Joined: Mar 2014
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From: Central WI.
need help finding oem lq4 piston part # 
i broke a ring land on #6 and want to throw another oem piston in, but can't seem to find the right one. ordered one from the stealership using the vin # and they sent me a gen IV piston. engine came out of an 03 express van. vin #1GCHG35U331185686. the piston is the pressed pin style with coated skirt.
Last edited by wicked_sten; May 6, 2016 at 08:57 PM.
What was the part number you received? If its not correct, they should take it back.
I found 89017473 supperceeds 89017238
Should be 2nd design piston with coated skirt and pressed pin rod. about 495 Grams
1st design had no coating and weighed about 450 grams.
I found 89017473 supperceeds 89017238
Should be 2nd design piston with coated skirt and pressed pin rod. about 495 Grams
1st design had no coating and weighed about 450 grams.
Thread Starter
Teching In
Joined: Mar 2014
Posts: 14
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From: Central WI.
Thanks!They gave me a 89017472, floating style
You know, I didn't look close enough. The part number I gave above is a .5mm Over size
The one they gave you is correct for a Standard bore. It states it can be used for pressed or floating.
Likely It's just a revised version and has valve relieves as you stated.
Most likely you will need to track down a good used one. Sorry for the confusion.
89017472
PISTON,(W/PIN)(WHEN REPLACED BY 89017472 USE T/W CONN ROD 12607475)(STD)(USED WITH FLOATING PIN PISTON)(WITH PIN RETAINING CLIP). PISTON,(W/PIN)(WHEN REPLACING 89017237 USE T/W CONN ROD 12607475)(STD)(USED WITH FLOATING PIN PISTON)(WITH PIN RETAINING CLIP)(USED TOGETHER WITH CONN ROD 12577583). PISTON,(W/PIN)(WHEN REPLACING 89017237 USE T/W CONN ROD 12607475)(STD)(USED WITH FLOATING PIN PISTON)(WITH PIN RETAINING CLIP). PISTON,(W/PIN)(WHEN USED ON 2002 AND PRIOR LQ4 ENGINES,CRANKSHAFT COMPATIBLE WITH FLOATING PIN PISTON MUST ALSO BE USED.)(STD)(2ND DESIGN WEIGHS ABOUT 495 GRAMS,HAS SKIRT COATING)(FOR 1ST DES SEE 88894003). PISTON,(W/PIN)(STD)(USED WITH FLOATING PIN PISTON)(W/PIN RETAINING CLIPS). PISTON,(W/PIN)(STD)(USED WITH FLOATING PIN PISTON)(WITH PIN RETAINING CLIP).
The one they gave you is correct for a Standard bore. It states it can be used for pressed or floating.
Likely It's just a revised version and has valve relieves as you stated.
Most likely you will need to track down a good used one. Sorry for the confusion.
89017472
PISTON,(W/PIN)(WHEN REPLACED BY 89017472 USE T/W CONN ROD 12607475)(STD)(USED WITH FLOATING PIN PISTON)(WITH PIN RETAINING CLIP). PISTON,(W/PIN)(WHEN REPLACING 89017237 USE T/W CONN ROD 12607475)(STD)(USED WITH FLOATING PIN PISTON)(WITH PIN RETAINING CLIP)(USED TOGETHER WITH CONN ROD 12577583). PISTON,(W/PIN)(WHEN REPLACING 89017237 USE T/W CONN ROD 12607475)(STD)(USED WITH FLOATING PIN PISTON)(WITH PIN RETAINING CLIP). PISTON,(W/PIN)(WHEN USED ON 2002 AND PRIOR LQ4 ENGINES,CRANKSHAFT COMPATIBLE WITH FLOATING PIN PISTON MUST ALSO BE USED.)(STD)(2ND DESIGN WEIGHS ABOUT 495 GRAMS,HAS SKIRT COATING)(FOR 1ST DES SEE 88894003). PISTON,(W/PIN)(STD)(USED WITH FLOATING PIN PISTON)(W/PIN RETAINING CLIPS). PISTON,(W/PIN)(STD)(USED WITH FLOATING PIN PISTON)(WITH PIN RETAINING CLIP).
Thread Starter
Teching In
Joined: Mar 2014
Posts: 14
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From: Central WI.
The description almost seems contradicting, since the wrist pins are different diameters between gen III and gen IV rods/pistons. I never even picked the one they ordered up to try after they told me it came with circlips, I had just assumed it was wrong. Thanks for the help, I'll head to the classified section.