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View Full Version : Sohc blown hg..or not?


ZenkiKid
07-21-2010, 10:13 AM
So I read online that Sohc KA's have this problem with the chain guides where if they wear all the way down it will cause timing cover damage and lead to coolant in the motor.

1990-1994 Nissan 240SX: Reliability - Consumer Guide Automotive (http://consumerguideauto.howstuffworks.com/1990-to-1994-nissan-240sx-2.htm)

Timing belt: Timing-chain tensioner tends to fail, damaging the timing cover and allowing coolant to leak into the oil pan. (1990)

A couple months ago I thought I blew my headgasket because i noticed coolant in my engine oil and i got the milky substance. I almost Overheated but I was able to shut the car off and allowed it cool down and filled my radiator up with enough coolant/water to make my way home and park my car where its been since. Never once did I have white smoke coming out of my exhaust.

Just the other day I got bored and started my car and noticed that the car started and idled just fine and no white smoke. What are the chances that I really dont have a blown HG and my timing cover just got eaten up?

ZenkiKid
07-21-2010, 06:30 PM
common guys anyone?

orion::S14
07-21-2010, 08:54 PM
It's very common for the chain to eat through the front cover, like you said.

Happens on DE's as well, but less so.

The best thing you could do is compression test the motor.

Let it run for a minute or so, to warm it up a little. Then perform a simple compression test.

If it tests fine, then chances are it's your front cover. Pick up a replacement from someone on here for cheap.

- Brian