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Bryan
Hagerty Employee

Piston Slap: Toyota’s non-hybrid, hybrid engine

Al writes:

I have an early ’70s vintage Toyota 2TG engine that I made into a hybrid 3T/2TG to get it up to about a 1.8 liters. I marked the two sets of timing chains and cams when I removed the heads to make sure it would go back together as it should. No matter how I position the chains and cams, I cannot get it all to line up as it was. It seems to be out a half degree on one cam.

 

The Toyota service manual makes reference to special tools to align the cams and chains. These aren’t readily available. Is there a way to make sure the components won’t self destruct without the special guides? The last thing I want is this self destructing when I fire it up. I’ve spun it all manually and via the starter and everything turns; I’m just trying to avoid a latent timing issue when I tune it. Any advice on setting up the DOHC cams will be appreciated.

 

Sajeev answers:

I’ve been privy to hybrid motor swaps in the Datsun Z-car world, but they were all overhead cam (OHC) motors ... 

 

Read the full article on Hagerty.com:

https://www.hagerty.com/media/advice/piston-slap-toyotas-non-hybrid-hybrid-engine/

 

2 REPLIES 2
takidd
New Driver

A little clarity is needed.  It was and is a DOHC.  All that was swapped was the 3tc rotating assembly to give it .2 more liters.  Thats why Im confused.  The head and all timing components remain the same.

Sajeev
Community Manager

I hate to admit it, but I am still stumped as to why this is happening.