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Old 02-04-2020, 11:31 PM   #1
odiaz1831
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Default 2001 DOHC Engine Rebuild Difficulty

How difficult is an engine rebuild on one of these engines? I don't need one but I'm starting to find less and less s series at my local PNP. Was thinking about pulling an engine and slowly trying to rebuild it on my free time. I took an engine rebuild class at community college. I've never rebuilt an engine besides in that class and that class used engine that were missing parts and we never got to see if they would turn over. So I have some understanding. However I've never fully done it from start to finish. I know I'll need some new tools, but how difficult would it be? I'm pretty mechanically inclined, I'm currently a diesel apprentice. I know it'll be a fun learning experience, just want to know if this is a good engine to learn on?

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Old 02-05-2020, 12:33 AM   #2
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Default Re: 2001 DOHC Engine Rebuild Difficulty

It all depends.

What does the engine need to meet or exceed spec and how much of the work do you wish to do?

Does it need machining? How much are you willing to spend? What tools/machines do you have access to? How handy are you with measuring equipment? Do you have inside and outside micrometers or a bore dial set?

Have friends locally who do?

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Old 02-05-2020, 12:38 AM   #3
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Default Re: 2001 DOHC Engine Rebuild Difficulty

I say find a good machine shop and go for it. I spent about $1400 on my engine rebuild. It runs awesome.
http://www.saturnfans.com/forums/sho...d.php?t=230898

Edit: I see you are in Chicago. I used Pakes machine shop in Janesville, WI. Highly recommended.

...
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Engine, subframe, diff pin mod, brake lines, headliner, alternator, and so on!
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Old 02-05-2020, 01:02 AM   #4
odiaz1831
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Default Re: 2001 DOHC Engine Rebuild Difficulty

Quote:
Originally Posted by onlinebiker View Post
It all depends.

What does the engine need to meet or exceed spec and how much of the work do you wish to do?

Does it need machining? How much are you willing to spend? What tools/machines do you have access to? How handy are you with measuring equipment? Do you have inside and outside micrometers or a bore dial set?

Have friends locally who do?
I don't have an engine picked out yet but regardless I want to break it down fully and have it machined if need be. I'm pretty good with measuring equipment, but I would need more quality measuring tools. I have a micrometer from HF but would prefer a better one so I can continue to do this and learn. Budget currently is no limit since I plan on doing this at a pretty slow pace. I eventually want to finish with an engine that is as good as if it came off the assembly line (preferably better since I want the upgraded pistons to not let it burn oil eventually). Any brands you recommend for measuring equipment

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Old 02-05-2020, 02:55 AM   #5
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Default Re: 2001 DOHC Engine Rebuild Difficulty

Quote:
Originally Posted by Waiex191 View Post
I say find a good machine shop and go for it. I spent about $1400 on my engine rebuild. It runs awesome.
http://www.saturnfans.com/forums/sho...d.php?t=230898

Edit: I see you are in Chicago. I used Pakes machine shop in Janesville, WI. Highly recommended.
Thanks for the push! I'll look into Pakes. 1400 doesn't seem too bad for getting a fresh enginein one of these cars. Plus I really want the experience. Any brands you recommend for measuring equioment? I know Mitutoyo is a good one but they're on the much much higher side

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Old 02-05-2020, 02:56 AM   #6
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Default Re: 2001 DOHC Engine Rebuild Difficulty

Quote:
Originally Posted by odiaz1831 View Post
Any brands you recommend for measuring equipment
If budget doesn't matter it's hard to do better than Starrett. Pratt & Whitney make some good gauge's too, our shop has ones that measure +/- 0.0006in from the 50's.
Not sure which is more expensive but for normal engine work the HF gauges are good enough.

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Old 02-05-2020, 08:50 AM   #7
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Default Re: 2001 DOHC Engine Rebuild Difficulty

For me, it was only the best measuring equipment - whatever they had at Pakes. Plus it came with people who know how to use it. If you want the experience of mic-ing the bores and journals, buy the best you can afford and this is not a time to go to Harbor Freight.

Pakes bought the rebuild kit for me from enginetech including silv-o-lite pistons I specified. They ordered the right size of bearings and pistons. That was part of the $1400. Also they rebuilt the head. I didn't have to mess with it.

...
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'99 SL2, 5SP bought new
Rebuilt at 204,067 September 2017
Engine, subframe, diff pin mod, brake lines, headliner, alternator, and so on!
'98 SC2, 5SP bought 2018

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Old 02-05-2020, 09:05 AM   #8
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Default Re: 2001 DOHC Engine Rebuild Difficulty

Quote:
Originally Posted by odiaz1831 View Post
I don't have an engine picked out yet but regardless I want to break it down fully and have it machined if need be. I'm pretty good with measuring equipment, but I would need more quality measuring tools. I have a micrometer from HF but would prefer a better one so I can continue to do this and learn. Budget currently is no limit since I plan on doing this at a pretty slow pace. I eventually want to finish with an engine that is as good as if it came off the assembly line (preferably better since I want the upgraded pistons to not let it burn oil eventually). Any brands you recommend for measuring equipment
Mitutoya is ok..

Starrett, Brown and Sharp and Fowler are all better.

Your best bet is buying used - from a retiring machinist who took good care of his equipment. I bought everything I owned used (except a couple of pairs of calipers)

You need up to 4 inch micrometers.

You will also need telescope gauges at minimum for measuring the bore - but that is a time consuming task with telescope gauges. A good bore dial is preferred - but they can be pricey. I bought my set (1.5 -6 inch) at auction for $25. (Nobody else seemed to know what it was)(I also got my dial hones at the same auction for $10 a set - with spare blades.. Again - nobody knew what they were)

You will also need a dial indicator and a flex magnetic base. In fact - buy this first... It will allow you to check crankshaft endplay with the engine assembled - an excellent first indicator of engine condition. A new crank isn't cheap.

...
92 SC2
93 SC2
96 SC2
97 SL2
97 SC2
99 SC2
01 SC2 x 2 yellow
02 SC2
02 SL2
parts
2 94 SC2 parted out
2 96 SC2
98 SC2 - rusty frame minus engine.

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Old 02-11-2020, 12:21 PM   #9
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Default Re: 2001 DOHC Engine Rebuild Difficulty

My local rebuilder quoted $2000 for a good engine,
and $4000 for a screamer.

OldNuc advised, expect to pay $2000 for Parts alone, if DIY.

The body would need be in perfect condition to justify.

To really do it right , need a 'torque plate', plus diamond hone, plateau .

probably smarter to get a 5-10 year old car from a going manufacturer

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Old 02-11-2020, 12:47 PM   #10
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Default Re: 2001 DOHC Engine Rebuild Difficulty

Difficulty depends on your experience. With a class under your belt, you will make it through without major mistakes, but there will be plenty of places where you will have questions if you have not done it before.

Machine shop selection is critical. You want to find one that is very picky and has the tools to do the job. OldNuc states to stay away from the fuzzy dice shops and look for one where the local truck engines get rebuilt. You want to see a clean and well-organized shop. Quiz them about how they will be boring and honing the cylinders so you can get the plateau finish using the proper grit.
Instruct the shop that you need factory clearances.

For the torque plate that the OP mentions, ideally, boring the cylinders uses a torque plate so that the cylinders are bored to the proper geometry, the torque plate provides the necessary pressure so that when the cylinders are bored, they have the same geometry when the head is installed. A good shop will order pistons and bearings for you. The flip side is, I've never found a shop that has a torque plate, and my first rebuild ran fine until someone totaled the car in a crash, and I'm keeping my eyes open for a donor vehicle.

Felpro gaskets can be found online.

The head can be rebuilt at the same time as the block. You may opt for cleaning the lifters yourself. I've never gotten them apart, but I had a shop take care of them. There are links here to differentracing articles on various aspects of the build, look him up and read.

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Old 02-15-2020, 01:48 AM   #11
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Default Re: 2001 DOHC Engine Rebuild Difficulty

> I've never found a shop that has a torque plate

I contacted a rebuilder in L.I. area, suggested by a wrecking yard which had a national customer base before 2009.
The rebuilder said that no one would bother with a torque plate on 'that engine'.

Some guys on this forum used one, though.
I once found a manufacturer of torque plates for Saturn S Series.

The shops OldNuc suggests will Not have a torque plate that fits; those engines work fine.

As soon as the head is torqued down, the out-of-round spec is at the limit for at least one cylinder.
But, 90% of the oil consumption issue is from the lack of piston 'drain back' holes... and aging intake valveguide-to-stem seals (which easy/routine to renew at rebuild, or even on car).

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Old 02-15-2020, 06:55 AM   #12
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Default Re: 2001 DOHC Engine Rebuild Difficulty

Quote:
Originally Posted by TomM96 View Post
> I've never found a shop that has a torque plate

I contacted a rebuilder in L.I. area, suggested by a wrecking yard which had a national customer base before 2009.
The rebuilder said that no one would bother with a torque plate on 'that engine'.

Some guys on this forum used one, though.
I once found a manufacturer of torque plates for Saturn S Series.

The shops OldNuc suggests will Not have a torque plate that fits; those engines work fine.

As soon as the head is torqued down, the out-of-round spec is at the limit for at least one cylinder.
But, 90% of the oil consumption issue is from the lack of piston 'drain back' holes... and aging intake valveguide-to-stem seals (which easy/routine to renew at rebuild, or even on car).

I was at Perry's Harley Davidson a couple decades ago - and saw their "mechanic" honing out a Evolution cylinder without the torque plates - which the company I worked for built - abd HD required as a dealer essential tool.

Genius mechanic had never heard of them.....

.....

Another reason for DIY.....

...
92 SC2
93 SC2
96 SC2
97 SL2
97 SC2
99 SC2
01 SC2 x 2 yellow
02 SC2
02 SL2
parts
2 94 SC2 parted out
2 96 SC2
98 SC2 - rusty frame minus engine.

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