P0335 - GM 4.3 Crank Sensor Shim




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jvw57: 2001 Astro w 4.3L, I changed the sensor and the new one came with 2 shims measuring .020 each. I did not add the shims as the one I took out was not scratched.. The new one lasted about a week and when I pulled it off, it was scratched. I added both shims and it was magically fixed. Thanks for this video!! 

Damon Dinicola: Thanks for the video and the post of TSB it was a great help!

KenMildred BarnabyBlais: just a tip about this change of crank censor there is a retainer nut inside casing that hole censor this retainer nut will lossin after time and cause the crank censor to move around and cause the mulit missfire error it just happen to me a little piece of twine to hold it together and some five min epoxy put bolt throu censor first tread retainer nut back on just a few threads then put enough epoxy on it push it back up in place then re tighting nut should work fi for you and could save you 110 dollars on new crank censor hope this helps someone

TwiZtiDTeXas: Okay so you built a new shim for it, and reused the same sensor. What happens if I buy a New Delco sensor for it do I still need to buy a shim for it or no? Thanks for the vid.

jamesrussell0823: I had the very same issue. I pulled the engine to replace the crankshaft, main bearings, rod bearings, and oil pump. As everyone knows, you must remove the time chain cover. All was well and then all of a sudden I got the check engine light and the 3000 rpm issues. I am so glad that I ran across this video! I fashioned a "shim" from a piece of gasket material that I had, popped the crankshaft position sensor back in and viola, I have my strong running Blazer back. For those of you with this issue, you can get the shim at AutoZone for about $4.00 if you don't have a way of making one for yourself. The AZ part number is SU12931. Hope this helps for other folks!!

hpelsilenciohp martinez: u can get it in ebay for only 25.00 buck

osocali777: Thnx 4 the tip u just saved me 80 bucks that I can spend on something else on my engine.....appreicate ya taking the time to post helps alot of us

omar pinckney: I was always trying to figure out why that was happening thanks!!!

hpelsilenciohp martinez: thanks bro i wonder where was located

MARTINLOCZ: I have a 2000 gmc savanna same motor and need to know where its located please thanks

Ten Second BuickGN: good stuff :)

joat rating: We all should take the time and post videos like this to spread our own knowledge. .

wtbm123: I agree if the sensor is not hitting then it does not need shined. Have you checked the sensor its self

Probedude2000: Do you still have a sensor? Really just need the O.D. of the sensor to know what the I.D. of the shim needs to be.

wtbm123: I do not have one to measure,but some take more than one shim. You only need to shim if it is hitting. Mine was hitting pretty hard so I used a piece of thin black gasket material. No harm in shimming out as it will not hit anything. Most of the time i have ran in to the need to shim is when a plastic cover has been reused.If you do not see where it is hitting it may not need shimmed.

Thisoldcar: Thats real interesting and good information to know about. Thx for posting the information to help the rest of us troubleshoot and fix these problems that develop from time to time. Cheers OLDDUDE

76chyanne: no your vid is well explained ,the time cover was not replaced sensor just crapped out ,put new one in and fired up this guy was tost i just got my self obssesd with shim cause a four dollar fix was better then 100 but cover was not replaced so it was my bad not listening thanks for vid

kerobinsonii: Very cool ! BTW I got your sticker and will get a video of it up soon !

Probedude2000: Thank you. It's a friends vehicle that I'm going to take a look at tomorrow to help them out. I suspect it will need to be shimmed. McMasterCarr has 0.020" thick shims, 25 for $6 and I can get them in a day. Cheaper than Autozone at $4 each and then I'll have enough to give away to others. Just wish I knew for sure the size.

76chyanne: after talking with gm i installed as is ,fired right up runs like a champ,just letting you no ,u buy a sensor dont get the shim its not needed on after market sensor ,great vid just letting u no

wtbm123: Thanks

76chyanne: i just wanted to drop a line the video was help thanks ,but i have a 2003 s-10 pickup zr2 4.3 would start but die then it wood not start this sensor was bad but after searching around i got sensor but no shim ,had to be ordered called my local gm service dealer tech said there is no buliten ,he said the bulliten must have been pulled ,the after market sensors do not need the spacer,they have fixed the problem with these sensors the prob depth is different ,so tried shim but it ran like crap ,

Probedude2000: If I could trouble you, do you still have a shim left over that you can measure? Looking for the I.D. and O.D. dimensions so I can either make my own or buy my own shims. I think the I.D. is 0.75" and the O.D. is 1.00" but I'm not sure. Have a Jimmy that is throwing a P0335 code.

vwdarrin: good tip

wtbm123: thanks for watching

Yaheuben66: So I take it that the sensor picks up a change in magnetic feild as the crankshaft goes past?

wtbm123: Cool glad you found the fix. Those plastic covers sometimes have a mind of their own.. Thanks for watching and commenting

Timetotinker: really cool info......tony

fatstercat: mr sensor needs to be put in his place with a shim of course lol cool shtuff terry

wtbm123: thanks

wtbm123: The size would be determined by how much it needs shimmed.Just add till you are sure it does not hit but not to far out it will not pick up signal.

Ironheart Fabrication: That's something I don't want to forget! Thanks for the info.

wtbm123: thanks

wtbm123: Thanks for watching

ZIGgassedUP: That's what we call "a trick for young players"...Good tip for the rest of the gang.

wtbm123: Yes ,basically what it does

wtbm123: thanks for watching

wtbm123: LOL , Really Wilber fixed it , he just lets me take the credit.

wtbm123: Cool Thanks for watching

wtbm123: thanks for watching

wtbm123: Cool.

Don's trains and more: It took me a while to find the correct diagnosis for my engine, same problem as yours. Unfortunately my timing cover has never been replaced and my engine has roughly 335000 miles on it. I did use the shim GM part# 12565102, at some point I thought the original problem was the tone wheel moving, turns out as you stated the plastic timing cover warps/cracks, when the engine gets good and hot it set a different air gap at the tone wheel. This causes p0339,336 to set on the dtc or MIL. Good video.

tao manivong: Thanks for your help i fix mine by watching your video

Fred Gaines: Good video as always!

wtbm123: Thanks for watching

wtbm123: Most of the time you do not need the shim . You are supposed to replace the cover everytime it is removed. Alot of people try and reuse the cover and most times if shims are needed , that is why. So if the sensor goes bad you most likely able to just replace. I got the bulletin straight from GM for the 4.3 , so not sure why they could not find it. Sorry if i confused people with the video , I thought i had explained why i had to shim ,Thanks for watching.

hillard2327: I had to do the same thang to my chevy

Probedude2000: Electrically not yet. No running issues, just the code. Going to get a used one at the junkyard to try.

TheRickfix: thankx for the tip,good stuff

jevchance: Good to see a vid from you sir!
Rating:
P0335 - GM 4.3 crank sensor shim 4.7 out of 5

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P0335 - GM 4.3 crank sensor shim