Toymods Car Club Inc: Tech & Conversions => Shim over, Bucket over? Difference?

Toymods Car Club
www.toymods.org.au

Toymods » Tech & Conversions » Shim over, Bucket over? Difference? Show: Today's Posts :: Show Polls Email to friend

Author

Topic

gianttomato
Forums Junkie

I supported Toymods

Location:
I renounced punctuation
Registered:
May 2002

Re: Shim over, Bucket over? Difference?	Sat, 15 February 2003 11:37

They are different ways of adjusting the valve clearance. Shim over - adjusting shim sits in a recess of the bucket. Cam acts directly on the shim. Advantage here is that the cam doesn't have to be taken out to do the valve clearances. This is OK to a point, but with high lift cams there is a tendency for the shims to be 'flicked out' of the bucket recess at high RPM, causing horrendous damage. Most late model DOHC multivalve Toyota engines are of this design. Shim under - shim sits in a recess in the valve retainer, and this all sits under the bucket. The cam acts directly on the bucket so there is nothing to flick out. One can put the lumpiest cams and rev not having to worry about spitting out a shim. The problem is that you have to take the cam out to adjust the valve clearance. I believe 2TG, 18RG, and Gen3 onwards 3SGE have this set up. Can also get TRD stuff to suit 4AGE/7MGTE. No shim - the 1SZ-FE has buckets which have a small adjustment 'nipple' cast into their underside. The buckets are available in a range of different adjustments. Again, this means there are no shims to flick out, but also means that you have to buy a new bucket if the adjustment is out. I will post pics of both set ups for the 2JZGE tomorrow night. [Updated on: Sat, 15 February 2003 11:39] [Report message to a moderator]

Current Time: Sun Jul 13 23:00:05 UTC 2025

Total time taken to generate the page: 0.015975952148438 seconds

.:: Contact :: Home ::.