4AGE - smoke machine

[oldeskewltoy]

afew points..... wet test tells NOTHING about oil control rings... neither does compression test or leakdown test!

A fresh rebuild should be allowed to run at 1500-2000 rpm for at least 10-20 minutes. If after that time you still have smoking issues then may require a teardown.

[Grega]

feral - they were not soaked no, but, the sides of the pistons (skirts) were lubed prior to installing into the bores.

turbo4agte - true ; however ; its not always possible not to do this (bleeding cooling system comes to mind) post a fresh build

anyways, its stopped smoking now for some reason. i drove it last night and its not smoking. it may just be that things need to bed in (bear in mind i'm lucky if i've driven 1-2km)

(i've never built an engine before, so, all this is very very new to me)

[turbo4agte]

turbo4agte - true ; however ; its not always possible not to do this (bleeding cooling system comes to mind) post a fresh build

Says the guy without access to a Snapon Coolant Exchanger which cycles coolant through the engine automatically.

I just mean dont just leave it idling in the driveway for like 10 minutes, thats all.

[oldcorollas]

A fresh rebuild should be allowed to run at 1500-2000 rpm for at least 10-20 minutes. If after that time you still have smoking issues then may require a teardown.

that running time and revs is just for bedding in cams... it may be detrimental to rings....

there are of course many theories on running an engine in, but most manfacturers use the same one....

run it up on a rolling road a couple of times to get load on the rings (motoman stylez)

[Grega]

turbo4agte - nah hell no.
couple of minutes here and there tops
10 mins = glazed bores

stu - my cams don't need running in brother - they're the old ones re-used.

my running in style is not to baby the thing - and at the same time not rev the ring off the thing either - no 8000rpm changes but normal driving as i would every day to and from work for example (when not stuck in traffic)

[oldcorollas]

http://www.mototuneusa.com/break_in_secrets.htm


a lot of the fears of breaking in improperly are just a legacy of the olden days of shit american motors... with shit bores, shit pistons and shit rings.... relative to today

[jeffro ra28]

some may be interested to know that some manufacturers assemble their rings, pistons in the bores with wd-40 or a similar lube. Not oil! the Instructions on some "totalseal" rings is not to use any oil!

As OC said, alot of these run in stories are derived from shit american motors which are hardly relative to the engine standards of today. Heck, i dont beleive in run, just flog the crap out of it from day one. I havent had any comebacks yet.

[feral4mr2]

Why exactly would you soak your pistons and rings in oil before breaking in a rebuilt engine?

is something my grandfather taught me when i built my 1st engine 17 odd years ago. i've done it ever since and it's never caused any harm.
i run some of the same oil i will use for the break in over the rings/pistons before inserting them into the bore. then they and the bores are lubed. i dont know, a dry 1st fire up doesnt sound right to me.
hell you lube the bearings on assembly dont you.....

[turbo4agte]

Well I lube the bore, and the piston pins. Otherwise the rest stays dry.

You make it seam like you even coat the top of the pistons and compression rings in oil, which doesn't make any sense to me since those areas never see oil in a good running engine.

It just doesn't seem right putting oil where it never normally enters. The only smoke I want on initial startup is the little bit thats caused from the lubed valve guides.

[30psi 4agte]

is something my grandfather taught me when i built my 1st engine 17 odd years ago. i've done it ever since and it's never caused any harm.
i run some of the same oil i will use for the break in over the rings/pistons before inserting them into the bore. then they and the bores are lubed. i dont know, a dry 1st fire up doesnt sound right to me.
hell you lube the bearings on assembly dont you.....

I must say i do this too... and always have...
I dont drown them in oil but just a light lube on the rings before i put em in.

[feral4mr2]

Well I lube the bore, and the piston pins. Otherwise the rest stays dry.

You make it seam like you even coat the top of the pistons and compression rings in oil, which doesn't make any sense to me since those areas never see oil in a good running engine.

It just doesn't seem right putting oil where it never normally enters. The only smoke I want on initial startup is the little bit thats caused from the lubed valve guides.

yes i do put a coat on the compression rings, but not over the top of the piston.

it's all good buddy, i'll keep doing it the way i have for years, and you do it the way you have.

[Grega]

i didn't coat the rings
i coated the skirts though
i've never built an engine before ; the toyota manual didn't say to do this ; i figure toyota knows best so just followed their instructions
anyway, my 4AGE is no longer a smoke machine, i've done some 50km now and no problems whatsoever.....the 4AGE with the auto is actually quite toey i'm very suprised, it goes extremely well.
thanks to all for your suggestions and comments here I really appreciate the feedback etc i receive here.

[Grega]

I did a writeup on my whole conversion too in case anyone is interested

http://www.toymods.net/forums/showth...591#post711591