cracked engine block - 4ja1

[isuzu4ja1]

Hi,

Good day to all Tsikot members, new member lang ako buti na lang meron mga ganitong forums. Meron kaming Hilander ung problem ng sasakyan meron crack yung engine block doon sa first 1st bore/sleeves (un ba tawag don?) na malapit sa auxilliary fan ng engine. Yung dahilan yata nito nung umuwi yung father ko tapos may hisss sound so check ko yung hood yon putok na yung upper radiator hose & wala ng water yung cooling system, hindi na din napansin ng father ko. Nung ilang weeks after ng accident sa radiator napansin ko lakas ng oil consumption & masmaingay na din sya and ang puti ng usok ng sasakyan parang nasa heaven, yon pinacheck namin sa mekaniko namin for overhaul na daw and ang masama pa may crack nga yung engine block pinakita samin nung naalis na yung upper part ng makina. Ang suggestion ng mekaniko namin kung makahanap daw kami ng surplus na engine block or buong surplus na makina e hindi na kaya ng budget. Ginawan na lang ng paraan double sleeves na lang nya yung part na may crack pero hindi nya garanteed na tatagal. Almost 3 yrs na din until now ok pa yung makina kaya lang hindi na lang namin masyado hinihirit baka kasi mpwersa ulit yung part na my crack. Naghanap kami sa blumentrit ng engine block ng 4ja1 meron palang 2 klase nito? 1.) Belt type 2.) Gear type-ito daw yung lilabas locally dito sa pinas sabi nung mga natanungan namin. Bihira pa yung gear type and kung meron wala pang papers baka lalo lang mapasama kasi baka galing sa carnap. Hay buhay... kapag nakakajackpot nga naman.....


1.)Magkaiba ba talaga ang mechanism ng belt type engine block sa gear type engine block pero parehong 4ja1?
2.)San pa kaya pwede makahanap ng engine block ?
3.)How much po kaya o estimate lang ng 4ja1 engine na surplus? Hindi ko na kasi natanong last time na nagcavas ako ng engine block.

[4JGtootsie]

Welcome bro!
Kung block ang may crack medyo complicated yan kasi may engine number yan. It also depends on where the crack is and how well it was repaired. My suggestion is look for a surplus engine with papers and wait till the engine gives up and just replace it.

[isuzu4ja1]

4jgtootsie,

Oo nga eh! complicated dahil nga sa meron syang engine number at required talaga na meron legal papers. Yung crack located sa front wall ng pinaka 1st na cylinder. Sa tingin ko ok yung pagkakagawa kasi tumagal sya pero syempre hindi pa din ako campante dahil nga any time pwede masira ulit. Meron nakapag sabi sakin na pwede daw ako tanong sa mga auto insurance para maghanap ng mga total wrecked na mga auto pero pwede pa yung yung makina. Siguro maghahanap muna din ako ng surplus & susulitin ko na lang yung engine ko ngayon anyway wala pa talaga syang problem up to now.

Thanks!


MGA KA TSIKOT BAKA MERON KAYO STOCK NG ENGINE BLOCK OR SURPLUS NA ENGINE NG 4JA1 W/ PAPERS PM NYO LANG PO AKO HEHEHE...

[4JGtootsie]

Tatagal yan, kung hindi matagal ng bumigay. Bantayan mo lang ang cooling system especially water pump at stuck na thermostat. Baka nga mas matibay pa yan sa mabibili mong replacement.

[isuzu4ja1]

Siguro nga ilang yrs na din sya ok pa din, na daan na din siguro sa dasal hehehe... Yep! ingat na nga ako sa temperature ngayon, san nga pala makikita sa makina yung device ng thermostat sa radiator din ba mismo? plano ko nga din maglagay ng coolant, ano ba magandang brand? maraming salamat nga pala sa mga advice medyo nakakbawas ng worries ko.

[4JGtootsie]

isuzu4ja1,

Sa upper radiator hose engine end. When you see an aluminum elbow na may dalawang nut or bolt nasa loob niyon. What happened to your engine is the 2nd worst punishment an engine can endure 1st is running it without oil.

[isuzu4ja1]

Sige check ko ito before ako magflush and maglagay ng coolant + distilled water. may nabasa ako sa ibang forum regarding thermostat valve it helps to regulate the temperature of an engine, standard ba sa lahat ng mga sasakyan ito? many thanks!!!!

[4JGtootsie]

Standard yan. I dont usually suggest removing it but in your situation i would. It will lessen the pressure within the cooling jacket. I have a friend that had a stuck closed thermostat. Nag overheat sa highway nag crack and cyl. head. Palit head, piston at liner.

[niky]

If your thermostat is old, replace it. Running without one will cause increased engine wear from running cold all the time.

[4JGtootsie]

If your thermostat is old, replace it. Running without one will cause increased engine wear from running cold all the time.

Just curious lang po. How can running a cold engine cause wear? Higher fuel consumption possible.

[niky]

It's not just fuel consumption. When the engine is cold, lubrication isn't as effective, so more wear occurs. This is slightly lessened with multigrade synthetics (0w30 (not recommended for older engines or those needing thicker oil) to 10w40) which aren't as thick at startup, but it still isn't good for your engine. Granted, running without a thermostat at 1/4 on the temperature is better than running ice cold (0 on the temp.meter), but engine oils are designed so that they're flow best at "running temperatures". Running with them for extended periods of time at a temperature they're not designed to run at will cause a lot of problems... which is why motorists in the US switch to thinner oils in the wintertime.

Also, your catalytic converter doesn't work until it's up to heat, so running at low temps is bad for your emissions. Don't pollute. Fix that thermostat...

[4JGtootsie]

Thank you sir Niky for the information.

Two last questions sir.

Pareho po ba ang running temperature at normal operating temperature?

Anong ibig sabihin ng ice cold at 0 on the temp meter?

[blitzmage_89]

nagccrack b yung bore kpag wala nang tubig dumadaan sa radiator?

[niky]

Di exact yung temp meter... 0 can mean anything below 50 degrees C.

If no water is going through the system, a whole lot of things can happen... warped heads, pistons and cylinder bores welded together... etcetera.

[4JGtootsie]

Clear na sir Niky. Thank you po!

Blits,

Nag crack yung block. Most diesel engines have liners or sleeves which can easily be replaced, hindi yon ang bumigay sa engine ni isuzu4ja1 but the block itself . The problem was no water was circulating around the water jacket of the block, because of the immense heat the block cracked. I dont know whether the radiator had water but im sure the block had none. It has happened before that the thermostat doesnt open therefore colder water in the radiator doesnt flow inside the block.

[m_ron]

how cold can you get in the manila?

[4JGtootsie]

how cold can you get in the manila?

M ron,

Four seasons na rin sa Pinas! Rainy, Christmas, Dry at School season. Mahirap ang buhay pag school season magastos na walang bonus at 13th month pay. Nagbebelow zero (0) rin hindi ang temp pero laman ng walet. Magiging icecold ang tao pag namatay sa gutom

[m_ron]

^^^^^^

[ARB]

do you have a picture of the crack or picture lang of the damaged part.

isuzu 4JA1 engines have a thin cylinder sleeve, as thin as a sardine can lang maski i double sleeve pa to it is still thin. i cant imagine to can handle the compression if damaged na ang cylinder sleeves. unless iba ang sira. also isuzu engines commonly pag na sobra ng overheat mamatay ang makina as usual sa all diesels.

more details lang sa damage, 3 years na running ganda siguro mag ayos ng mechaniko. pics na lang to help us determine what part of the engine ang na damage.

[ARB]

as for the gear vs timing belt mas maganda gear no maintenance. but quieter ang belt.

but pwede yan it transfer, na gawa na dito sa amin. 4JB1 na belt ginawang gear type. and if you plan to change block or engine get the 4JB1 para larger and more powerful engine. 2.8 liters na siya or if you can find 4JB1T may turbo na.