1KZ-TE Started giving blow and consuming engine oil

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umairhamza (umairhamza) 2011-07-06 18:01:04 +0500 #1

Hi Dear All,

Im using FJ-90 with 1KZ-TE and it started giving blow when checked by opening engine oil cap plus it is also consuming enigne oil but the performance, feule consumption, starting and pickup is still extreemly good so kindly sugges me the optimum solution for this problem, what could be the side affects in the future and is it repairable/restorable or changing the main block assembly would be the only solution in the future. I shall be very kind of your openions and suggession.Thanx

umairhamza (umairhamza) 2011-07-06 18:03:07 +0500 #2

As we know that Diesel is already very expensive so this a new add-on of refilling an expensive diesel engine oil after every specific period

Xulfiqar (Xulfiqar) 2011-07-06 18:12:37 +0500 #3

If its not reducing engine oil, or smoking out the oil cap its OK - dont worry about it. When it comes to a point that the cap blows off the valve cover as soon as you loosen it - Then you have blowby.

Bad injection timing can also cause blowby. The pump is set by a dial gauge.

For oil consumption - renew the valve seals, its a normal wear item. Any workshop that is equipped enough can change them without removing the head.

umairhamza (umairhamza) 2011-07-06 18:20:24 +0500 #4

Thanx Xulfiqar...And yes it is reducing engine old and last time a mechanic said that your engine is weak and the best solution is to change the main head assembly but I`m really surprised and happy that changing the valve seals is possible without removing engine head plus how setup the proper fule injection...or it can only be done by some diesel laboratory? And do I need to find some educated high tech mechanic who can easily change the valve seals or any good diesel mechanic can do that?

Xulfiqar (Xulfiqar) 2011-07-06 18:57:17 +0500 #5

I dont know about hi tech mechanics - but I change them myself, with a simple jig to press the valves to remove the keepers. With the engine at TDC the 1st and 4th piston are at top - remove and replace their seals - as you remove the keepers the valves will rest on the piston face - hence no worry of valves dropping.

Once done - you can rotate engine carefully to align the centre 2 pistons no. 2 and 3 to TDC and replace their seals. When done - pack it up.

The pump timing is done by inserting a dial guage in the pump high pressure iron head and resting it on the plunger. It should have a little advance like 1mm at TDC.

jm_baloch (jm_baloch) 2017-01-23 22:13:49 +0500 #6

Hi brother,

Can this process be done by liqui moly diesel intake decarb spray? I need to know if this product of liqui moly is worth buying to clean intake and egr valve?