Bigg Ant

Got a question for you toyota guys....I did a motor swap on my 86 for the first time and everything seemed to work out ok. After everything checked out I drove it for awhile and then it started to overheat after 45 minutes so I pulled over and checked things out and seen a busted hose. I let it cool down and did a quick fix and got it back home. I checked the oil and it was how it should be. The next day I tinkered with it and started it up again and I could smell the sweetness of antifreeze, I looked on the dipstick and seen the oil/antifreeze mixture going on. Is there any other way the antifreeze could mix with the oil besides blowing the head gasket? The motor ran like a champ when I took it out of the other truck, was it just my bad luck and the gasket gave out after the swap? Looking for feedback before I get out in the heat and start tearing it down....Thanks!

swampfox

Timing chain might have wore a grove in the timing cover.

Bigg Ant

Wouldn't you hear the chain in there rattling around though if the guides were broken?

yoterr

yeah more than likely, buy urself a compression tester and do a leakdown test..(pump cylinder with 100 psi) and you can hear it bubbling in the rad then you have a bad head gasket...

Bigg Ant

I checked the compression and it wasn't too good.....what do I do now since the compression is low? Rebuild?

yoterr

depends...if you have a fubarred head gasket this would make compression low, search for a leakdown test do it and find out if it truly is the headgasket, or it can even be improperly adjusted valves or leaky valve seals

yoterr

also did you toss a cap full of oil in after you checked compression? if the # go'es up then you have bad rings and prolly just need to rebuild, if there the same its something els