YotaTech Forums - View Single Post - 93 4Runner 3.0

aLostDawg · 10-18-2004, 01:33 PM

Thanks for the compliments. As far as the sludge issue goes. I think this is an isolated occurance caused by a lack of maintenance. When I was working at Toyota I never saw a 3.4l with this problem. Several sets of head gaskets on the 3.4l and never saw anything close to this. On the other hand I did a couple of rebuilds and a couple sets of heads on Sienna's under Toyota's SPA. One tell-tale sign is to pull the oil filler cap and look inside of it. Sometimes sludge will even build up in there. I wouldn't worry too much though. This will happen if you don't change the oil. Regular oil changes will prevent this in a 3.4l.

JC

10-18-2004, 01:33 PM	#5 (permalink)
aLostDawg Registered User Join Date: Apr 2004 Location: Colorado Springs, CO Posts: 176	thx Thanks for the compliments. As far as the sludge issue goes. I think this is an isolated occurance caused by a lack of maintenance. When I was working at Toyota I never saw a 3.4l with this problem. Several sets of head gaskets on the 3.4l and never saw anything close to this. On the other hand I did a couple of rebuilds and a couple sets of heads on Sienna's under Toyota's SPA. One tell-tale sign is to pull the oil filler cap and look inside of it. Sometimes sludge will even build up in there. I wouldn't worry too much though. This will happen if you don't change the oil. Regular oil changes will prevent this in a 3.4l. JC