Crashtd420 Posted March 19, 2020 Report Share Posted March 19, 2020 2 minutes ago, d.p said: And zvcardept lists the bearings for .25mm UNDERSIZE not oversize. \https://zcardepot.com/products/crankshaft-main-bearing-set-l20b-engine?variant=30986488774769 So is it safe to say my bearings are .25 undersized? If so then I would have no problem getting them off Ebay. It depends how you look at it... The crank is undersize so the bearing is oversized.... I would trust z car over what I saw on ebay for quality.... 1 Quote Link to comment
d.p Posted March 19, 2020 Author Report Share Posted March 19, 2020 (edited) 7 minutes ago, Crashtd420 said: It depends how you look at it... The crank is undersize so the bearing is oversized.... I would trust z car over what I saw on ebay for quality.... Quote An oversized bearing has the same inside diameter but a bit more material on the outside diameter. An undersized bearing measures the same outside but is thicker on the inside. So you would think I would want undersized so it had more material to mate with the crank that is undersized? I could be totally wrong on this but fuck if I know anything about any of this. lol More googling: Quote If you have the crank ground, they will grind it to a standard undersized (let's say .010 under). Then, you order the larger (or, "undersize") bearings for the 10-under crank. Edited March 19, 2020 by d.p 1 Quote Link to comment
Crashtd420 Posted March 19, 2020 Report Share Posted March 19, 2020 If you have the crank ground, they will grind it to a standard undersized (let's say .010 under). Then, you order the larger (or, "undersize") bearings for the 10-under crank. This is basically how you want to look at it.... 1 Quote Link to comment
Charlie69 Posted March 19, 2020 Report Share Posted March 19, 2020 The Z20 I have has 2 dip stick holes and I have seen L16s and L20Bs with 2 dipstick holes also, Maybe Mike or Hainz knows why some blocks are this way. You engine is looking good. Be sure to set the rings on the pistons in the proper order. 1 Quote Link to comment
d.p Posted March 19, 2020 Author Report Share Posted March 19, 2020 Rod bearings are VV .10 5644 so looks to be .25mm as well. So I will just them both from Zcardepot and call it a day. 2 Quote Link to comment
datzenmike Posted March 19, 2020 Report Share Posted March 19, 2020 All rods diameters are the same but L16/18 mains are smaller than L20B mains. If buying off e-Bay you better confirm the fit with plasti gauge. 1 Quote Link to comment
d.p Posted March 19, 2020 Author Report Share Posted March 19, 2020 (edited) 3 minutes ago, datzenmike said: All rods diameters are the same but L16/18 mains are smaller than L20B mains. If buying off e-Bay you better confirm the fit with plasti gauge. Same parts that zcar is selling just cheaper on Ebay/summit. Zcar tends to be more expensive from what I have seen. Crank: https://www.summitracing.com/parts/cle-ms2042a25mm?seid=srese1&gclid=EAIaIQobChMItbCb3LSn6AIVBXiGCh0M8w_pEAQYASABEgImHPD_BwE Main: https://www.summitracing.com/parts/cle-cb966a25mm/applications Edited March 19, 2020 by d.p 2 Quote Link to comment
Crashtd420 Posted March 19, 2020 Report Share Posted March 19, 2020 13 minutes ago, d.p said: Same parts that zcar is selling just cheaper on Ebay/summit. Zcar tends to be more expensive from what I have seen. Crank: https://www.summitracing.com/parts/cle-ms2042a25mm?seid=srese1&gclid=EAIaIQobChMItbCb3LSn6AIVBXiGCh0M8w_pEAQYASABEgImHPD_BwE Main: https://www.summitracing.com/parts/cle-cb966a25mm/applications That works.... 1 Quote Link to comment
d.p Posted March 20, 2020 Author Report Share Posted March 20, 2020 Ordered bearings and a new screen. Figure with all this coronavirus shit I got nothing but time to work on this engine amongst other things. Quote Link to comment
Greaser2 Posted March 20, 2020 Report Share Posted March 20, 2020 12 minutes ago, d.p said: Ordered bearings and a new screen. Figure with all this coronavirus shit I got nothing but time to work on this engine amongst other things. I would be careful ordering anything from CALIFORNIA Quote Link to comment
Crashtd420 Posted March 20, 2020 Report Share Posted March 20, 2020 9 minutes ago, d.p said: Ordered bearings and a new screen. Figure with all this coronavirus shit I got nothing but time to work on this engine amongst other things. I know I'm trying to atleast order my front coilovers before we go into lockdown up here.... seems like we are getting close to a "shelter in place order" Quote Link to comment
Crashtd420 Posted March 20, 2020 Report Share Posted March 20, 2020 2 minutes ago, Greaser2 said: I would be careful ordering anything from CALIFORNIA I have thought about this too... Maybe on line orders aren't a good idea right now..... Quote Link to comment
d.p Posted March 20, 2020 Author Report Share Posted March 20, 2020 I shipped one of my HREs to CA which was supposed to arrive there today to get fixed. Whether HRE is open to accept it or not and whether they do anything with it for the foreseeable future who the fuck knows. Just my luck. I ordered those bearings from MO so I should be good there. I WFH already so no real change to my job or my life for the most part. Maybe my son being out of school indefinitely is a change but just treat it as summer came sooner than usual. I am sure he will be complaining about how bored he is very soon. How is this shit affecting everyone else? Quote Link to comment
Crashtd420 Posted March 20, 2020 Report Share Posted March 20, 2020 So far we are ok up here.... We stocked up a little extra with neccessary supplies.... Kid is out of school till April 6th, luckily my mother in law lives on the other side of our duplex and the wife is down to half days.... I'm still working for now... only a 6 man machine shop so not too bad... Quote Link to comment
demo243 Posted March 20, 2020 Report Share Posted March 20, 2020 1 hour ago, Crashtd420 said: I know I'm trying to atleast order my front coilovers before we go into lockdown up here.... seems like we are getting close to a "shelter in place order" Not a bad idea... Just ordered some parts from oreilly should we go on lock down.... then I can atleast work on the dattos. Wish I had more cash floating around I'd order a full front end kit from Dave at Futo and get working on the 510 Quote Link to comment
d.p Posted March 28, 2020 Author Report Share Posted March 28, 2020 Time to install bearings and wondering what I need to measure and the best way to do that? The book I have isn’t overtly clear on this part. Do I want to measure journal to bearing or just bearing oil clearance ? Or both? And do I need to measure all of them? Quote Link to comment
d.p Posted March 28, 2020 Author Report Share Posted March 28, 2020 (edited) Ones more question. The bearings that came out have grooves on both halves (full groove?). The ones I got from zcardepot (sealed power) only have grooves on one side. why is that? new on the left old on the right. Edited March 28, 2020 by d.p Quote Link to comment
d.p Posted March 28, 2020 Author Report Share Posted March 28, 2020 Well I did the main bearing clearance and it came out .002” or .051mm. Is that within spec? Quote Link to comment
Crashtd420 Posted March 28, 2020 Report Share Posted March 28, 2020 Dont you have the book? Atleast you picked the right dimension to measure.... Quote Link to comment
Crashtd420 Posted March 28, 2020 Report Share Posted March 28, 2020 And I dont think the groove matter... Did all of them have the groove on both sides? Quote Link to comment
d.p Posted March 28, 2020 Author Report Share Posted March 28, 2020 Yeah I do but didn’t see it in the section about measuring it. I’ll look again. And yes all the bearings that came out of the engine had full grooves. I read that allows more oil flow for race engines. Mixed opinion on full 3/4 or half grooves are better from what I read. Quote Link to comment
Crashtd420 Posted March 28, 2020 Report Share Posted March 28, 2020 4 minutes ago, d.p said: Yeah I do but didn’t see it in the section about measuring it. I’ll look again. And yes all the bearings that came out of the engine had full grooves. I read that allows more oil flow for race engines. Mixed opinion on full 3/4 or half grooves are better from what I read. Well if it makes you feel better I think I have the same type of bearings.... You should be fine.... I see the spec is .0022- .0027 Quote Link to comment
Crashtd420 Posted March 28, 2020 Report Share Posted March 28, 2020 That's close enough to say your good with a plastic gauge measurement... Quote Link to comment
d.p Posted March 28, 2020 Author Report Share Posted March 28, 2020 Solid!!! Thanks crash. Quote Link to comment
Crashtd420 Posted March 28, 2020 Report Share Posted March 28, 2020 Are you using assembly lube? Do yourself a favor and as you tighten things to spec keep spinning the motor... If it ever starts to tighten up stop immediately and make sure nothing got out of place..... I had a bearing move on me while trying to install a piston .... so just take you time.... Quote Link to comment
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