Tahoe motor rebuild

6.2 turbo · May 16, 2010

Northern Auto Parts has Perfect Circle rings for $127,Summit wants almost $200 for the same part#. I'll probably get rings timing chain and high volume oil pump from Northern Auto Parts. Its amazing how much prices can vary,it never hurts to shop around.

Mikey von · May 17, 2010

davo727 said:
As far as the 1.7 rockers and maxpf engine working well? Last I saw on mikeyvons thread I dont think it has run yet to confirm anything

this is true that it has not been run under fuel to test. But it has been spun with a starter and clearances have been confirmed. I just need some cash to get it going (and a plan for exhaust). Have other priorities right now though.

6.2 turbo · May 24, 2010

I just bought a Isky Groove O Matic cylinder oring tool from Summit,maybe I'll test it on the 6.2 first ? Also I got a DS4 pump from a friend and removed the head and rotor,and the fuel spill valve,nobody ever mentioned that these pumps have 8 delivery valves compared to the DB2 which has only one. Looks like it would be easy to install a Db2 cam ring which would only need the cam pin hole enlarged. I'm seriously thinking of converting the Tahoe to electronic pump, do any of the trucks use a computer that sits on the fenderwell,and what year would be best,I imagine get the newest one I can find. The DS4 pump cam pin is larger than the DB4 and the DB2 has the smallest one.

6.2 turbo · May 25, 2010

Got my rings ,timing chain and oil pump today,from Northern Auto Parts. The rings are Perfect circle,but are actually Mahle,for $127,pretty happy about that. Got the oil pan painted Chevy orange.

redshift96 · May 25, 2010

$127 ??

6.2 turbo said:
Got my rings ,timing chain and oil pump today,from Norther Auto Parts. The rings are Perfect circle,but are actually Mahle,for $127,pretty happy about that. Got the oil pan painted Chevy orange.

Damn, that's a great price.

I think Mahle/Clevite "owns" Perfect Circle now, or at least the name. Or in some way, they're all rolled up in bed together.

6.2 turbo · May 29, 2010

Checked piston stick out on cyl's 1 and 2 its about .013 with the piston centered and .017 with it cocked, with .043 gaskets this should be exactly 22.5 to 1 and.030 squish area,and .026 at the closest if the piston rocks,I don't believe I want to go any closer.

buddy · May 29, 2010

Even GM conceded to 21.5 compression ratio in later engines. you may want to go a little lower. Is your gasket measured .043 after being squished down, as I thought it was supposed to compress to .045.

Matt Bachand · May 30, 2010

Wow thats tight. Its almost amazing that leaking injectors don't hydrolock more often.

6.2 turbo · May 30, 2010

I measured a used Felpro at the fire ring,I could easily be off a little. I am a little worried about having so much compression,even more so now that I have seen the DS4 cam lobes, which should be the same as Bill Heath"s So I have a pretty good idea how much fuel he actually has.

6.2 turbo · Sep 12, 2010

I really need to get to work on this thing. My wife's getting impatient. Lately I have been swamped with side jobs. Seems like I'm fixing everybody's vehicle except my own. I also need to decide what transmission to use, I'm tempted to use a nv3500,but am considering a 4l80e ,with a full manual shift kit ,or with the computer out of my 92. I believe there will be issues with torsion bar crossmember and the longer 4l80e,compared to the 4l60e . I know somebody that has a 4 door Tahoe with a 6.5 and a 700r4,and he is happy with it.

Veg_Out · Sep 13, 2010

I really want to see photos and video of this completed project!

DZZ71 · Sep 13, 2010

Me to!

6.2 turbo · Sep 20, 2010

Bought the copper 6.2 head gaskets on Ebay they are only .042 thick. I think they might work with orings and shellac or silicone . Guess I will build some compression now.

6.2 turbo · Sep 26, 2010

Got the gaskets the other day,they will not stick into the bore on the 6.5 , and look great. There is instructions with them on how to anneal the copper,don't think I will though.

6.2 turbo · Oct 23, 2010

Got a hydroboost,master cyl,and diverter valve,off a 89? chevy trk at the junk yard. Cost $26. Now I can get rid of the vac booster and abs. I will use all copper nickel alloy lines,so they don't rust .

6.2 turbo · Oct 25, 2010

http://www.thetrucksthttp://www.the...w.thetruckstop.us/forum/images/attach/jpg.gif I'm planning on using 12.9 allen head bolts for mains and heads . Also a picture of my 6.2's oil pump drive. Got all the cyls grooved for orings and got the orings in on one side.

6.2 turbo · Nov 4, 2010

I was going to use the 12.9 allen head bolts for the mains,but couldn't get them past 120 ftlbs. I installed the factory ones at 55 ftlbs +90 degree inner and 48 ftlbs +90 degree outer. The long ones varied any where from 120-140 or more ftlbs. I swapped a few of the soft ones out that couldn't make 130 ftlbs. I decided to stop at 135 ft lbs. Heath Diesel has studs for $ 329.

6.2 turbo · Nov 7, 2010

Today I cleaned and installed all the pistons and rods. Also the timing chain and cam. The cam was binding on the cam plug. I fixed that by beating on the cam nose with a rubber mallet to get sufficient end play. The timing chain is nice and tight. The loosest rod bearing clearance is .002, same for the mains. I also got some Eagle 589 wheels with 31-10.50 R 15's 0n them,cost $100. I can't decide if I need to put stiffer valve springs in the heads. I will look into it a little. I think this motor will be tight enough for 5 w 40 synthetic oil . Half thinking of using a stock oil pan , so I don't have to spend so much money for oil.