Overhauling

[Djerms]

Is it safe to say that overhauling will bring back your engine to its almost brand new state?

Considering these:
Major overhaul was done by a good mechanic/shop.

We are considering overhauling one of our company vehicles and one of my hesitations is that I heard that it won't last long or problems will come out shortly.

[niky]

It's hard to answer. It depends on how much is changed, what has to be done, and how good the mechanic is.

I've had some overhauls that lasted a long time... and some that didn't. I've had to overhaul an engine when we found out that it was previously overhauled and the previous idiot of a mechanic had put the freaking pistons in backwards... ...yes, that's a big deal, as the oilers were on the wrong side, so they weren't doing anything.

I've had one car overhauled by two different mechanics. One did a terrible job, the second one made the engine feel like new.

Also note, if the engine has had major structural damage (hydrolock, oil starvation leading to con-rod failure, overheating leading to extremely warped head), then there's no guarantee that parts you don't replace during the overhaul will not fail in the future due to hidden stress damage. This happened to me with a hydrolocked engine... after 40,000 kilometers, the head cracked due to some hidden damage from the flood.

[Cobalt Blue]

In overhauling someone told me to avoid oversizing the pistons because once you have done this, this is the last overhaul that will be effective the next might be not as efficient.

[mbeige]

Microscopic cracks can only be detected by highly trained mechanics/machinists that specialize in these things. Tolerances will probably not be as tight depending on the use it was subjected to. If the break in process was dutifully followed and pampered during its service life, then there's a good chance it will rebuild nicely but if it was abused then don't expect a lot. Having the factory service manual helps a lot in dealing with the technical aspects of the engine rebuild process.

If it's a company vehicle then chances are it's probably driver-driven so I can't vouch for how it was taken care of. It's all a subjective case of sorts so you're in the best position to determine if yours has a good chance of being rebuilt. Good luck.

[4JGtootsie]

Aside from what has been stated.

A specific service manual of that specific engine should be available to measure service limits of components. Procedures and markings should always be followed. People who overhaul without a manual/reference are irresponsible and gives good mechanics a bad reputation.

Once a mechanic assisted me in a overhaul. He said mali daw nabili kong piston rings kasi sinukut niya sa groves at ayaw pumasok and he even argued! So i said lagay mo yung rings the same exact way you put it in a piston. Tappered/keystone yung rings and he was fitting it the wrong way.

[mark_t]

Is it safe to say that overhauling will bring back your engine to its almost brand new state?

Considering these:
Major overhaul was done by a good mechanic/shop.

We are considering overhauling one of our company vehicles and one of my hesitations is that I heard that it won't last long or problems will come out shortly.

Yes, If it will be done by a Certifide Mechanic.

[norebo]

Sir, depende yan sa problema ng engine mo, ano po ba ang dahilan bakit kailangan na mag overhaul ng engine mo? Marami din po kasi dapat i-consider bago magpa-overhaul even yun damage ng engine should be consider bago mag overhaul, isa po kc yan sa magbibigay ng laki ng gastos. Depende din po sa gagawa at lalong lalo na sa machine shop na gagawa ng correction sa major engine parts(engine block, main shaft, cylinder head, etc). Malaki din po ang role ng machine shop, isa po yan sa mga nagiging dahilan kung bakit di nagtatagal ang mga overhauled engines.
Personally po kapag okay naman ang lahat tulad ng pina overhaul ko, so far six(6) years na ngayon okay pa, ala pa akong naging problema ulit sa engine.
For more info po you can pm me. Good Luck po.

[Galactus]

Yes, If it will be done by a Certifide Mechanic.

Hmmm...meron ba dito sa Pinas nun? Most mechanics here are backyard mechanics, or those who learned through experience. Wala naman yatang certifying body for automotive mechanics here, unlike sa Tate.

[1997]

Ganun din nangyare sa aken before... Overhaul ba or hinde? So we had it overhauled... After that ang pangit na ng tunog ng makina and hindi na maganda humatak.... Trsuted shop yung pinagpagawan namen... Although hindi na nagbabawas ng langis pero may usok pa din sa dip stick...

[KBR]

mmm... overhaul! I like Overhaulin!

[KBR]

this is a fully built 7MGTE engine for a 1989 Toyota Supra Turbo.. and it aint cheap.



aite, peace.

[4JGtootsie]

Nice work!!

ARP studs na ba ginamit?

[Bochekokik]

We used to have a brandnew L300 4d56 na ginagamit as public jeepney sa province. It took 6 years of daily hard use bago magsimulang mag consume ng oil. Pagdating sa ika8 years, talagang hindi na kaya ang oil consumption, 2liters per day na so nag decide na ipa overhaul. Almost lahat ng consumable parts pinalitan, piston, piston rings, bearings, cylinder liners, valves, etc. Pati injection jump at nozzles pina calibrate at pinalitan mga worn out parts.
After the overhaul, tumagal lang ng 3.5years of the same hard use, then nag start na uli mag consume ng oil. Pina overhaul uli, same procedure, best parts ang ginamit, tumagal lang uli ng 4years bago mag start mag consume ng oil.
Based on experience lang po ito, baka iba naman sa experience ng ibang tsikoters.

[Djerms]

Thanks sa mga nagreply. All the while I thought na trouble free ang overhauling. Its not cheap to buy a new vehicle din kasi.

Does anyone know of certified mechanics in the metro?

[4JGtootsie]

Nico,

Maybe you can give us the engine code so we can search people who can best undertake the task.
What are the signs that it needs an overhaul?

[yapoy86]

to all tsikoteers,

i have a recommended mechanic here in las pinas...

I have seen him overhauled different engines mostly US brand cars and European cars...

magaling talaga ito mechanic na ito.. alam ang ginagawa.. i've seen him nag overhaul ng mustang V8 gas engine, and some mercedes bens 6cyl inling gas engine and diesel engines.. may mga reference books pa nga sya basehan ng overhauling...

you may visit his shop here in las pinas near Red Ribbon just after RFC mall if coming from zapote.. Rogher Autocare..pasok lang kayo sa kanto ng red ribbon..

medyo tago lang yung shop nya pero dinadayo ng mga customer... completo sa gamit pati pang lift ng engine at yung engine holder while overhauling..

malinis gumawa... ung valve cover ko na dati laki may leak (laing moist ng oil yung paligid) eh naayos.. kaya happy na ako malinis lagi engine ko..

if you need his number pm me na lang..

[Djerms]

Yapoy,

Hehe medyo malayo yata ang las pinas.

4jg: Its for the isuzu fuego eh. Not sure kung ano angine but I'll check. I think 4jb1? Check ko bro.

Thanks.

[KBR]

Nice work!!

ARP studs na ba ginamit?

thanks bro, and yes ARP Head Studs ang nakalagay sa makina na yun.. pati HKS "Bead Type" Metal Head Gasket .. and other goodies as well


aite, peace.

[speedyfix]

aside from the mechanic the duration of the build will depend also on the parts you use. kung replacement lahat then it will last shorter than if you used oem parts.

[mark_t]

this is a fully built 7MGTE engine for a 1989 Toyota Supra Turbo.. and it aint cheap.



aite, peace.

Ayan ka na naman! nang iingit!

Dito sa Pinas wala mabilhan ng gamit kung meron man china made.