402 ls2 swap people needed. HELP
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From: bayarea
402 ls2 swap people needed. HELP 
Hello All I need some help with my 402 ls2. Here is a break down on whats in this motorSDPC short block (402) -15 cc pistons
Cam 226/226 580 lift 112 lsa
Stage 2 heads with a 65cc with .0041 gasgets (these are ls1 heads)
Had it put in the car with the new motor and then started the up.(motor was primed before stating) There was a loud ping/hitting (sounds a little like a tin can banging on metal. My first though was maybe I did not have Valve/piston clarence but the heads don't looked like they where milled.
I was also wondering could it be that with the stroke of the new motor could it be hiting the oil pan with the crankshaft?? Or is there somthing I overlooked??
With a 4" stroke, the crank weights hitting the windage tray, I think thats what it is, seems to be a problem. Did you check for clearences here? A few washers to space it out is enough. With a cam lift that small, PV clearence should not be an issue. Do the pistons have valve reliefs?
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From: bayarea
Originally Posted by Ferocity02
With a 4" stroke, the crank weights hitting the windage tray, I think thats what it is, seems to be a problem. Did you check for clearences here? A few washers to space it out is enough. With a cam lift that small, PV clearence should not be an issue. Do the pistons have valve reliefs?
I do think you are right about the crankweights i will check it in the morning.
I had the same problem i just hit the tray witha ballpein hammer so i didnt have to clearance the pick upfor the proper oil pan the pick up cleareance. I have a 632/642 lift cam and 2cc relief and have plenty of clearance w/ a 2.08 intake valve.
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From: bayarea
Thankyou Thankyou all for your replys I talk to my shop about this and they also called SDPC and got the same answers. It should be all done by tommarow. (I hope)
Thanks Again your guys are "the Man"
Thanks Again your guys are "the Man"
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From: Anderson, Indiana
It's not the crank that hits, it's the rod bolts. Here's what it looks like from just rolling the engine thru one revolution with a breaker bar:
Due to the angle of the windage tray, it required 2 washers per stud on one side:
....and one washer per stud on the other:
No contact after that. I also used a drop of Loctite on each nut due to the reduced thread contact caused by the spacers.
Due to the angle of the windage tray, it required 2 washers per stud on one side:
....and one washer per stud on the other:
No contact after that. I also used a drop of Loctite on each nut due to the reduced thread contact caused by the spacers.
__________________
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
John - That's what my windage tray looked like, but the gouges were slight and not that deep. I shimmed all of them with 2 washers with the exception of the one where the oil pump mounts, which I only used one washer.
Jhong321 - Unfortunately this is one of those issues only an experienced LSX engine builder knows about, but the average person doesn't. You need to tear it apart to check the damage.
Jhong321 - Unfortunately this is one of those issues only an experienced LSX engine builder knows about, but the average person doesn't. You need to tear it apart to check the damage.
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From: bayarea
Well we pulled the oil pan and wandage and it was only one tiny little mark on it and everything else was fine. Put it all back together and stared it up and it ran perfect now i just need to go breck it in and get it tuned. Thanks again for all your help
