1KZ-TE 1994 Hilux Surf Engine Blow By

[rehanlodhi]

Hi all, Wanted to ask if my 1kz-te engine blow is normal? because I've been told from every mechanic that amount of blow I'm getting is pretty normal in these engines and not to worry about anything. But I am experiencing power loss(specially after speedometer reaches 60) and oil coming out of oil cap and bit of oil is flowing into the turbo as well from blow-off pip.

Could someone assist in identifying the necessary steps to resolve this issue from the following videos? Any help would be awesome!




Context: Its 1994 hilux surf 3.0 diesel turbo with around 169000 milage on the odometer, fuel pump was repaired recently(like 4 months ago) with serviced injectors not sure if its the first repair, OEM turbo working just fine and engine is running liqui moly 20w-50.

 

[GreenPump]

This isn't much information to go on. Are you experiencing any of the following...

• Oil consumption
• Exhaust smoke
• Starting issues/low compression symptoms

Have you checked valve clearances? Is there also blow-by from your oil dipstick tube? Compression test results?

 

[gigantorr]

As a cross check / for info, I've got an LN167R 3.0L 5L engine with 315,000 km on the ODO and unfortunately it decided to put its head in the oven (blew the head gasket).
Fortunately, I took care of things well enough not to cook the engine and the OEM head ended up in the bin.
The head was replaced with an after market casting and all the OEM valves and other bits and pieces were given a birthday and it all got put back together - she works fine now.
To finish off proceedings, I had the shop who sorted out all the work to do a compression test.

Results as follows:
1/ 435 2/ 430 3/ 430 4/ 425 (results in psig)
Target Spec 455 psig
Minimum Permissible 284 psig
Max. Variation < 71 psi.
So, with an average compression at about 93% of target after all those miles, I reckon that's pretty good going. Personally, I heaved a sigh of relief that the old donk should have a fair few miles in the old beast yet.

If you're seriously concerned about blowby, then get your engine compression tested so that you're working with quantitative data rather than internet guesswork. The attached service data sheet covers a 1KZ-TE, so you could use that data for reference.

From what I know (which isn't saying much) all these old diesels blow by a bit and it's not necessarily the end of the world. I've got the advantage of being the only owner. Your case sounds like your 1KZ is not in as happy a place as my 5L.

Your vids haven't come through (maybe try youtube?).

Hope you get it sorted but all I can suggest is work with data (I've got an engineering background - not mechanical though) and take it from there. Otherwise you're just adrift in a sea of conjecture.